* [jimc:dd-drm-rfc 13/18] drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: warning: Value stored to 'a' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
@ 2022-01-22 20:15 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2022-01-22 20:15 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 33981 bytes --]
CC: kbuild-all(a)lists.01.org
TO: Jim Cromie <jim.cromie@gmail.com>
tree: https://github.com/jimc/linux.git dd-drm-rfc
head: c86deb7d09199fd29665d9c68f1e70850132e49a
commit: ed4425a17de1eb5638703d40ed1d002b28963687 [13/18] drm_print: add choice to use dynamic debug in drm-debug
:::::: branch date: 4 months ago
:::::: commit date: 4 months ago
config: x86_64-randconfig-c007-20211009 (https://download.01.org/0day-ci/archive/20220123/202201230137.mBVZ14jX-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 30caca39f401ae17927439c0a0bd6d1b1916dd6a)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/jimc/linux/commit/ed4425a17de1eb5638703d40ed1d002b28963687
git remote add jimc https://github.com/jimc/linux.git
git fetch --no-tags jimc dd-drm-rfc
git checkout ed4425a17de1eb5638703d40ed1d002b28963687
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
^
include/linux/mfd/twl.h:157:9: note: expanded from macro 'TWL_CLASS_IS'
return ((id) == (GET_TWL_REV)) ? 1 : 0; \
^
include/linux/mfd/twl.h:160:1: note: Returning the value 1, which participates in a condition later
TWL_CLASS_IS(4030, TWL4030_CLASS_ID)
^
include/linux/mfd/twl.h:157:2: note: expanded from macro 'TWL_CLASS_IS'
return ((id) == (GET_TWL_REV)) ? 1 : 0; \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/mfd/twl-core.c:1201:6: note: Returning from 'twl_class_is_4030'
if (twl_class_is_4030()) {
^~~~~~~~~~~~~~~~~~~
drivers/mfd/twl-core.c:1201:2: note: Taking true branch
if (twl_class_is_4030()) {
^
drivers/mfd/twl-core.c:1202:3: note: 'temp' declared without an initial value
u8 temp;
^~~~~~~
drivers/mfd/twl-core.c:1204:3: note: Calling 'twl_i2c_read_u8'
twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mfd/twl.h:180:9: note: Calling 'twl_i2c_read'
return twl_i2c_read(mod_no, val, reg, 1);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/mfd/twl-core.c:473:7: note: 'regmap' is null
if (!regmap)
^~~~~~
drivers/mfd/twl-core.c:473:2: note: Taking true branch
if (!regmap)
^
drivers/mfd/twl-core.c:474:3: note: Returning without writing to '*value'
return -EPERM;
^
include/linux/mfd/twl.h:180:9: note: Returning from 'twl_i2c_read'
return twl_i2c_read(mod_no, val, reg, 1);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mfd/twl.h:180:2: note: Returning without writing to '*val'
return twl_i2c_read(mod_no, val, reg, 1);
^
drivers/mfd/twl-core.c:1204:3: note: Returning from 'twl_i2c_read_u8'
twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/mfd/twl-core.c:1205:8: note: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage
temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
~~~~ ^
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:514:8: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch]
if (!(dflow->en_scaling || dflow->en_img_enhancement))
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1164:8: note: Calling 'komeda_splitter_validate'
err = komeda_splitter_validate(pipe->splitter, conn_st,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:572:6: note: Assuming 'splitter' is non-null
if (!splitter) {
^~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:572:2: note: Taking false branch
if (!splitter) {
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:577:2: note: Taking false branch
if (!in_range(&splitter->hsize, dflow->in_w)) {
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:583:2: note: Taking false branch
if (!in_range(&splitter->vsize, dflow->in_h)) {
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:592:2: note: Taking true branch
if (IS_ERR(c_st))
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:593:3: note: Returning without writing to 'l_output->en_scaling'
return PTR_ERR(c_st);
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1164:8: note: Returning from 'komeda_splitter_validate'
err = komeda_splitter_validate(pipe->splitter, conn_st,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1166:6: note: Assuming 'err' is 0
if (err)
^~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1166:2: note: Taking false branch
if (err)
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1168:8: note: Calling 'komeda_scaler_validate'
err = komeda_scaler_validate(conn, kcrtc_st, &l_dflow);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:514:8: note: Branch condition evaluates to a garbage value
if (!(dflow->en_scaling || dflow->en_img_enhancement))
^~~~~~~~~~~~~~~~~
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
>> drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: warning: Value stored to 'a' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct drm_plane *a = node->base.plane;
^ ~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: note: Value stored to 'a' during its initialization is never read
struct drm_plane *a = node->base.plane;
^ ~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/arm/display/komeda/komeda_kms.c:122:22: warning: Value stored to 'b' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct drm_plane *b = new->base.plane;
^ ~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:122:22: note: Value stored to 'b' during its initialization is never read
struct drm_plane *b = new->base.plane;
^ ~~~~~~~~~~~~~~~
include/linux/list.h:73:2: warning: Dereference of null pointer [clang-analyzer-core.NullDereference]
WRITE_ONCE(prev->next, new);
^
include/asm-generic/rwonce.h:61:2: note: expanded from macro 'WRITE_ONCE'
__WRITE_ONCE(x, val); \
^
include/asm-generic/rwonce.h:55:30: note: expanded from macro '__WRITE_ONCE'
*(volatile typeof(x) *)&(x) = (val); \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:205:6: note: Assuming 'err' is 0
if (err)
^~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:205:2: note: Taking false branch
if (err)
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Assuming 'i' is < field 'num_crtc'
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:846:7: note: expanded from macro 'for_each_new_crtc_in_state'
(__i) < (__state)->dev->mode_config.num_crtc; \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Loop condition is true. Entering loop body
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:845:2: note: expanded from macro 'for_each_new_crtc_in_state'
for ((__i) = 0; \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Assuming field 'ptr' is non-null
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:848:16: note: expanded from macro 'for_each_new_crtc_in_state'
for_each_if ((__state)->crtcs[__i].ptr && \
~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/drm/drm_util.h:63:38: note: expanded from macro 'for_each_if'
#define for_each_if(condition) if (!(condition)) {} else
^~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Left side of '&&' is true
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:848:16: note: expanded from macro 'for_each_new_crtc_in_state'
for_each_if ((__state)->crtcs[__i].ptr && \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Taking false branch
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:848:3: note: expanded from macro 'for_each_new_crtc_in_state'
for_each_if ((__state)->crtcs[__i].ptr && \
^
include/drm/drm_util.h:63:32: note: expanded from macro 'for_each_if'
#define for_each_if(condition) if (!(condition)) {} else
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:214:7: note: Assuming 'err' is 0
if (err)
^~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:214:3: note: Taking false branch
if (err)
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:217:9: note: Calling 'komeda_crtc_normalize_zpos'
err = komeda_crtc_normalize_zpos(crtc, new_crtc_st);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Left side of '&&' is false
struct komeda_crtc *kcrtc = to_kcrtc(crtc);
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded from macro 'to_kcrtc'
#define to_kcrtc(p) container_of(p, struct komeda_crtc, base)
^
include/linux/kernel.h:495:61: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Taking false branch
struct komeda_crtc *kcrtc = to_kcrtc(crtc);
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded from macro 'to_kcrtc'
#define to_kcrtc(p) container_of(p, struct komeda_crtc, base)
^
include/linux/kernel.h:495:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:322:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:310:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:302:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Loop condition is false. Exiting loop
struct komeda_crtc *kcrtc = to_kcrtc(crtc);
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded from macro 'to_kcrtc'
#define to_kcrtc(p) container_of(p, struct komeda_crtc, base)
--
10 warnings generated.
Suppressed 10 warnings (10 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
14 warnings generated.
drivers/target/target_core_pr.c:227:2: warning: Value stored to 'tpg' is never read [clang-analyzer-deadcode.DeadStores]
tpg = sess->se_tpg;
^ ~~~~~~~~~~~~
drivers/target/target_core_pr.c:227:2: note: Value stored to 'tpg' is never read
tpg = sess->se_tpg;
^ ~~~~~~~~~~~~
drivers/target/target_core_pr.c:1022:26: warning: Value stored to 'se_tpg' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct se_portal_group *se_tpg = nacl->se_tpg;
^~~~~~ ~~~~~~~~~~~~
drivers/target/target_core_pr.c:1022:26: note: Value stored to 'se_tpg' during its initialization is never read
struct se_portal_group *se_tpg = nacl->se_tpg;
^~~~~~ ~~~~~~~~~~~~
drivers/target/target_core_pr.c:1279:39: warning: Value stored to 'tfo' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
const struct target_core_fabric_ops *tfo =
^~~
drivers/target/target_core_pr.c:1279:39: note: Value stored to 'tfo' during its initialization is never read
const struct target_core_fabric_ops *tfo =
^~~
drivers/target/target_core_pr.c:1796:3: warning: Value stored to 'dest_se_deve' is never read [clang-analyzer-deadcode.DeadStores]
dest_se_deve = tidh->dest_se_deve;
^ ~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:1796:3: note: Value stored to 'dest_se_deve' is never read
dest_se_deve = tidh->dest_se_deve;
^ ~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:1954:3: warning: Value stored to 'len' is never read [clang-analyzer-deadcode.DeadStores]
len += sprintf(buf+len, "No Registrations or Reservations");
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:1954:3: note: Value stored to 'len' is never read
len += sprintf(buf+len, "No Registrations or Reservations");
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:2450:39: warning: Value stored to 'tfo' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:2450:39: note: Value stored to 'tfo' during its initialization is never read
const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:2760:39: warning: Value stored to 'tfo' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:2760:39: note: Value stored to 'tfo' during its initialization is never read
const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:3163:2: warning: Value stored to 'tf_ops' is never read [clang-analyzer-deadcode.DeadStores]
tf_ops = se_tpg->se_tpg_tfo;
^ ~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:3163:2: note: Value stored to 'tf_ops' is never read
tf_ops = se_tpg->se_tpg_tfo;
^ ~~~~~~~~~~~~~~~~~~
drivers/target/target_core_pr.c:3924:3: warning: Value stored to 'add_desc_len' is never read [clang-analyzer-deadcode.DeadStores]
add_desc_len = 0;
^ ~
drivers/target/target_core_pr.c:3924:3: note: Value stored to 'add_desc_len' is never read
add_desc_len = 0;
^ ~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
drivers/media/dvb-frontends/horus3a.c:141:23: warning: Value stored to 'priv' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct horus3a_priv *priv = fe->tuner_priv;
^~~~ ~~~~~~~~~~~~~~
drivers/media/dvb-frontends/horus3a.c:141:23: note: Value stored to 'priv' during its initialization is never read
struct horus3a_priv *priv = fe->tuner_priv;
^~~~ ~~~~~~~~~~~~~~
drivers/media/dvb-frontends/horus3a.c:149:23: warning: Value stored to 'priv' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct horus3a_priv *priv = fe->tuner_priv;
^~~~ ~~~~~~~~~~~~~~
drivers/media/dvb-frontends/horus3a.c:149:23: note: Value stored to 'priv' during its initialization is never read
struct horus3a_priv *priv = fe->tuner_priv;
^~~~ ~~~~~~~~~~~~~~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
drivers/media/dvb-frontends/helene.c:432:22: warning: Value stored to 'priv' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct helene_priv *priv = fe->tuner_priv;
^~~~ ~~~~~~~~~~~~~~
drivers/media/dvb-frontends/helene.c:432:22: note: Value stored to 'priv' during its initialization is never read
struct helene_priv *priv = fe->tuner_priv;
^~~~ ~~~~~~~~~~~~~~
drivers/media/dvb-frontends/helene.c:452:22: warning: Value stored to 'priv' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct helene_priv *priv = fe->tuner_priv;
^~~~ ~~~~~~~~~~~~~~
drivers/media/dvb-frontends/helene.c:452:22: note: Value stored to 'priv' during its initialization is never read
struct helene_priv *priv = fe->tuner_priv;
^~~~ ~~~~~~~~~~~~~~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
>> drivers/gpu/drm/i2c/tda998x_drv.c:798:3: warning: Value stored to 'flag0' is never read [clang-analyzer-deadcode.DeadStores]
flag0 = reg_read(priv, REG_INT_FLAGS_0);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i2c/tda998x_drv.c:798:3: note: Value stored to 'flag0' is never read
flag0 = reg_read(priv, REG_INT_FLAGS_0);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/i2c/tda998x_drv.c:799:3: warning: Value stored to 'flag1' is never read [clang-analyzer-deadcode.DeadStores]
flag1 = reg_read(priv, REG_INT_FLAGS_1);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i2c/tda998x_drv.c:799:3: note: Value stored to 'flag1' is never read
flag1 = reg_read(priv, REG_INT_FLAGS_1);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c:366:3: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores]
err = PTR_ERR(kingdisplay->enable_gpio);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c:366:3: note: Value stored to 'err' is never read
err = PTR_ERR(kingdisplay->enable_gpio);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
drivers/usb/dwc3/core.c:56:2: warning: Value stored to 'mode' is never read [clang-analyzer-deadcode.DeadStores]
mode = dwc->dr_mode;
^ ~~~~~~~~~~~~
drivers/usb/dwc3/core.c:56:2: note: Value stored to 'mode' is never read
mode = dwc->dr_mode;
^ ~~~~~~~~~~~~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
13 warnings generated.
Suppressed 13 warnings (13 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
drivers/usb/dwc3/gadget.c:687:2: warning: Value stored to 'dep' is never read [clang-analyzer-deadcode.DeadStores]
dep = dwc->eps[1];
^ ~~~~~~~~~~~
drivers/usb/dwc3/gadget.c:687:2: note: Value stored to 'dep' is never read
dep = dwc->eps[1];
^ ~~~~~~~~~~~
drivers/usb/dwc3/gadget.c:698:3: warning: Value stored to 'dep' is never read [clang-analyzer-deadcode.DeadStores]
dep = dwc->eps[num];
^ ~~~~~~~~~~~~~
drivers/usb/dwc3/gadget.c:698:3: note: Value stored to 'dep' is never read
dep = dwc->eps[num];
^ ~~~~~~~~~~~~~
drivers/usb/dwc3/gadget.c:1681:39: warning: The result of the left shift is undefined due to shifting '0' by '14', which is unrepresentable in the unsigned version of the return type 'int' [clang-analyzer-core.UndefinedBinaryOperatorResult]
test_frame_number |= dep->combo_num << 14;
^
drivers/usb/dwc3/gadget.c:3450:6: note: Assuming the condition is false
if (!(dep->flags & DWC3_EP_ENABLED)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/dwc3/gadget.c:3450:2: note: Taking false branch
if (!(dep->flags & DWC3_EP_ENABLED)) {
^
drivers/usb/dwc3/gadget.c:3459:6: note: Assuming 'epnum' is not equal to 0
if (epnum == 0 || epnum == 1) {
^~~~~~~~~~
drivers/usb/dwc3/gadget.c:3459:6: note: Left side of '||' is false
drivers/usb/dwc3/gadget.c:3459:20: note: Assuming 'epnum' is not equal to 1
if (epnum == 0 || epnum == 1) {
^~~~~~~~~~
drivers/usb/dwc3/gadget.c:3459:2: note: Taking false branch
if (epnum == 0 || epnum == 1) {
^
drivers/usb/dwc3/gadget.c:3464:2: note: Control jumps to 'case 3:' at line 3468
switch (event->endpoint_event) {
^
drivers/usb/dwc3/gadget.c:3469:3: note: Calling 'dwc3_gadget_endpoint_transfer_not_ready'
dwc3_gadget_endpoint_transfer_not_ready(dep, event);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/dwc3/gadget.c:3325:2: note: Calling 'dwc3_gadget_endpoint_frame_from_event'
dwc3_gadget_endpoint_frame_from_event(dep, event);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/dwc3/gadget.c:3241:1: note: Returning without writing to 'dep->combo_num'
vim +/a +121 drivers/gpu/drm/arm/display/komeda/komeda_kms.c
61f1c4a8ab7575 james qian wang (Arm Technology China 2019-01-03 96)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 97) static int komeda_plane_state_list_add(struct drm_plane_state *plane_st,
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 98) struct list_head *zorder_list)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 99) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 100) struct komeda_plane_state *new = to_kplane_st(plane_st);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 101) struct komeda_plane_state *node, *last;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 102)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 103) last = list_empty(zorder_list) ?
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 104) NULL : list_last_entry(zorder_list, typeof(*last), zlist_node);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 105)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 106) /* Considering the list sequence is zpos increasing, so if list is empty
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 107) * or the zpos of new node bigger than the last node in list, no need
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 108) * loop and just insert the new one to the tail of the list.
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 109) */
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 110) if (!last || (new->base.zpos > last->base.zpos)) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 111) list_add_tail(&new->zlist_node, zorder_list);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 112) return 0;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 113) }
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 114)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 115) /* Build the list by zpos increasing */
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 116) list_for_each_entry(node, zorder_list, zlist_node) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 117) if (new->base.zpos < node->base.zpos) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 118) list_add_tail(&new->zlist_node, &node->zlist_node);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 119) break;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 120) } else if (node->base.zpos == new->base.zpos) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 @121) struct drm_plane *a = node->base.plane;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 @122) struct drm_plane *b = new->base.plane;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 123)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 124) /* Komeda doesn't support setting a same zpos for
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 125) * different planes.
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 126) */
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 127) DRM_DEBUG_ATOMIC("PLANE: %s and PLANE: %s are configured same zpos: %d.\n",
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 128) a->name, b->name, node->base.zpos);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 129) return -EINVAL;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 130) }
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 131) }
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 132)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 133) return 0;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 134) }
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 135)
:::::: The code at line 121 was first introduced by commit
:::::: 109bd7d5f4c2db66541272e5a41aeabd6cfeef95 drm/komeda: Adds zorder support
:::::: TO: Lowry Li (Arm Technology China) <Lowry.Li@arm.com>
:::::: CC: Liviu Dudau <Liviu.Dudau@arm.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
^ permalink raw reply [flat|nested] 2+ messages in thread
* [jimc:dd-drm-rfc 13/18] drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: warning: Value stored to 'a' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
@ 2022-01-25 14:43 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2022-01-25 14:43 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 34387 bytes --]
CC: kbuild-all(a)lists.01.org
TO: Jim Cromie <jim.cromie@gmail.com>
tree: https://github.com/jimc/linux.git dd-drm-rfc
head: c86deb7d09199fd29665d9c68f1e70850132e49a
commit: ed4425a17de1eb5638703d40ed1d002b28963687 [13/18] drm_print: add choice to use dynamic debug in drm-debug
:::::: branch date: 4 months ago
:::::: commit date: 4 months ago
config: x86_64-randconfig-c007-20211009 (https://download.01.org/0day-ci/archive/20220125/202201252247.vq1Bm7yr-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 30caca39f401ae17927439c0a0bd6d1b1916dd6a)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/jimc/linux/commit/ed4425a17de1eb5638703d40ed1d002b28963687
git remote add jimc https://github.com/jimc/linux.git
git fetch --no-tags jimc dd-drm-rfc
git checkout ed4425a17de1eb5638703d40ed1d002b28963687
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
drivers/mfd/rohm-bd70528.c:282:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = regmap_update_bits(bd70528->chip.regmap,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/mfd/rohm-bd70528.c:282:2: note: Value stored to 'ret' is never read
ret = regmap_update_bits(bd70528->chip.regmap,
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:514:8: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch]
if (!(dflow->en_scaling || dflow->en_img_enhancement))
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1164:8: note: Calling 'komeda_splitter_validate'
err = komeda_splitter_validate(pipe->splitter, conn_st,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:572:6: note: Assuming 'splitter' is non-null
if (!splitter) {
^~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:572:2: note: Taking false branch
if (!splitter) {
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:577:2: note: Taking false branch
if (!in_range(&splitter->hsize, dflow->in_w)) {
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:583:2: note: Taking false branch
if (!in_range(&splitter->vsize, dflow->in_h)) {
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:592:2: note: Taking true branch
if (IS_ERR(c_st))
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:593:3: note: Returning without writing to 'l_output->en_scaling'
return PTR_ERR(c_st);
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1164:8: note: Returning from 'komeda_splitter_validate'
err = komeda_splitter_validate(pipe->splitter, conn_st,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1166:6: note: Assuming 'err' is 0
if (err)
^~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1166:2: note: Taking false branch
if (err)
^
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1168:8: note: Calling 'komeda_scaler_validate'
err = komeda_scaler_validate(conn, kcrtc_st, &l_dflow);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:514:8: note: Branch condition evaluates to a garbage value
if (!(dflow->en_scaling || dflow->en_img_enhancement))
^~~~~~~~~~~~~~~~~
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
>> drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: warning: Value stored to 'a' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct drm_plane *a = node->base.plane;
^ ~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: note: Value stored to 'a' during its initialization is never read
struct drm_plane *a = node->base.plane;
^ ~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/arm/display/komeda/komeda_kms.c:122:22: warning: Value stored to 'b' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct drm_plane *b = new->base.plane;
^ ~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:122:22: note: Value stored to 'b' during its initialization is never read
struct drm_plane *b = new->base.plane;
^ ~~~~~~~~~~~~~~~
include/linux/list.h:73:2: warning: Dereference of null pointer [clang-analyzer-core.NullDereference]
WRITE_ONCE(prev->next, new);
^
include/asm-generic/rwonce.h:61:2: note: expanded from macro 'WRITE_ONCE'
__WRITE_ONCE(x, val); \
^
include/asm-generic/rwonce.h:55:30: note: expanded from macro '__WRITE_ONCE'
*(volatile typeof(x) *)&(x) = (val); \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:205:6: note: Assuming 'err' is 0
if (err)
^~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:205:2: note: Taking false branch
if (err)
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Assuming 'i' is < field 'num_crtc'
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:846:7: note: expanded from macro 'for_each_new_crtc_in_state'
(__i) < (__state)->dev->mode_config.num_crtc; \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Loop condition is true. Entering loop body
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:845:2: note: expanded from macro 'for_each_new_crtc_in_state'
for ((__i) = 0; \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Assuming field 'ptr' is non-null
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:848:16: note: expanded from macro 'for_each_new_crtc_in_state'
for_each_if ((__state)->crtcs[__i].ptr && \
~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/drm/drm_util.h:63:38: note: expanded from macro 'for_each_if'
#define for_each_if(condition) if (!(condition)) {} else
^~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Left side of '&&' is true
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:848:16: note: expanded from macro 'for_each_new_crtc_in_state'
for_each_if ((__state)->crtcs[__i].ptr && \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Taking false branch
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
^
include/drm/drm_atomic.h:848:3: note: expanded from macro 'for_each_new_crtc_in_state'
for_each_if ((__state)->crtcs[__i].ptr && \
^
include/drm/drm_util.h:63:32: note: expanded from macro 'for_each_if'
#define for_each_if(condition) if (!(condition)) {} else
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:214:7: note: Assuming 'err' is 0
if (err)
^~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:214:3: note: Taking false branch
if (err)
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:217:9: note: Calling 'komeda_crtc_normalize_zpos'
err = komeda_crtc_normalize_zpos(crtc, new_crtc_st);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Left side of '&&' is false
struct komeda_crtc *kcrtc = to_kcrtc(crtc);
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded from macro 'to_kcrtc'
#define to_kcrtc(p) container_of(p, struct komeda_crtc, base)
^
include/linux/kernel.h:495:61: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Taking false branch
struct komeda_crtc *kcrtc = to_kcrtc(crtc);
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded from macro 'to_kcrtc'
#define to_kcrtc(p) container_of(p, struct komeda_crtc, base)
^
include/linux/kernel.h:495:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:322:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:310:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:302:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Loop condition is false. Exiting loop
struct komeda_crtc *kcrtc = to_kcrtc(crtc);
^
drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded from macro 'to_kcrtc'
#define to_kcrtc(p) container_of(p, struct komeda_crtc, base)
--
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
drivers/gpio/gpio-xilinx.c:101:13: warning: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage [clang-analyzer-core.uninitialized.Assign]
map[index] &= ~(0xFFFFFFFFul << offset);
^
drivers/gpio/gpio-xilinx.c:520:2: note: Calling 'xgpio_read_ch_all'
xgpio_read_ch_all(chip, XGPIO_DATA_OFFSET, all);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpio/gpio-xilinx.c:133:16: note: Assuming 'bit' is <= 'lastbit'
for (bit = 0; bit <= lastbit ; bit += 32)
^~~~~~~~~~~~~~
drivers/gpio/gpio-xilinx.c:133:2: note: Loop condition is true. Entering loop body
for (bit = 0; bit <= lastbit ; bit += 32)
^
drivers/gpio/gpio-xilinx.c:134:3: note: Calling 'xgpio_read_ch'
xgpio_read_ch(chip, reg, bit, a);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpio/gpio-xilinx.c:120:2: note: Calling 'xgpio_set_value32'
xgpio_set_value32(a, bit, xgpio_readreg(addr));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpio/gpio-xilinx.c:98:2: note: 'index' initialized to 0
const size_t index = BIT_WORD(bit);
^~~~~~~~~~~~~~~~~~
drivers/gpio/gpio-xilinx.c:101:13: note: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage
map[index] &= ~(0xFFFFFFFFul << offset);
~~~~~~~~~~ ^
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
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5 warnings generated.
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7 warnings generated.
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7 warnings generated.
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7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
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7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
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7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
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7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
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7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
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7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
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10 warnings generated.
>> drivers/gpu/drm/i2c/tda998x_drv.c:798:3: warning: Value stored to 'flag0' is never read [clang-analyzer-deadcode.DeadStores]
flag0 = reg_read(priv, REG_INT_FLAGS_0);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i2c/tda998x_drv.c:798:3: note: Value stored to 'flag0' is never read
flag0 = reg_read(priv, REG_INT_FLAGS_0);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/i2c/tda998x_drv.c:799:3: warning: Value stored to 'flag1' is never read [clang-analyzer-deadcode.DeadStores]
flag1 = reg_read(priv, REG_INT_FLAGS_1);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i2c/tda998x_drv.c:799:3: note: Value stored to 'flag1' is never read
flag1 = reg_read(priv, REG_INT_FLAGS_1);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
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7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
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5 warnings generated.
drivers/input/keyboard/samsung-keypad.c:88:23: warning: The result of the left shift is undefined because the left operand is negative [clang-analyzer-core.UndefinedBinaryOperatorResult]
val &= ~(1 << col) << 8;
^
drivers/input/keyboard/samsung-keypad.c:158:3: note: Calling 'samsung_keypad_scan'
samsung_keypad_scan(keypad, row_state);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/input/keyboard/samsung-keypad.c:85:16: note: Assuming 'col' is < field 'cols'
for (col = 0; col < keypad->cols; col++) {
^~~~~~~~~~~~~~~~~~
drivers/input/keyboard/samsung-keypad.c:85:2: note: Loop condition is true. Entering loop body
for (col = 0; col < keypad->cols; col++) {
^
drivers/input/keyboard/samsung-keypad.c:86:7: note: Assuming field 'type' is equal to KEYPAD_TYPE_S5PV210
if (keypad->type == KEYPAD_TYPE_S5PV210) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/input/keyboard/samsung-keypad.c:86:3: note: Taking true branch
if (keypad->type == KEYPAD_TYPE_S5PV210) {
^
drivers/input/keyboard/samsung-keypad.c:88:23: note: The result of the left shift is undefined because the left operand is negative
val &= ~(1 << col) << 8;
~~~~~~~~~~~ ^
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
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4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
vim +/a +121 drivers/gpu/drm/arm/display/komeda/komeda_kms.c
61f1c4a8ab7575 james qian wang (Arm Technology China 2019-01-03 96)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 97) static int komeda_plane_state_list_add(struct drm_plane_state *plane_st,
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 98) struct list_head *zorder_list)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 99) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 100) struct komeda_plane_state *new = to_kplane_st(plane_st);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 101) struct komeda_plane_state *node, *last;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 102)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 103) last = list_empty(zorder_list) ?
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 104) NULL : list_last_entry(zorder_list, typeof(*last), zlist_node);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 105)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 106) /* Considering the list sequence is zpos increasing, so if list is empty
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 107) * or the zpos of new node bigger than the last node in list, no need
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 108) * loop and just insert the new one to the tail of the list.
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 109) */
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 110) if (!last || (new->base.zpos > last->base.zpos)) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 111) list_add_tail(&new->zlist_node, zorder_list);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 112) return 0;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 113) }
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 114)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 115) /* Build the list by zpos increasing */
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 116) list_for_each_entry(node, zorder_list, zlist_node) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 117) if (new->base.zpos < node->base.zpos) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 118) list_add_tail(&new->zlist_node, &node->zlist_node);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 119) break;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 120) } else if (node->base.zpos == new->base.zpos) {
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 @121) struct drm_plane *a = node->base.plane;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 @122) struct drm_plane *b = new->base.plane;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 123)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 124) /* Komeda doesn't support setting a same zpos for
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 125) * different planes.
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 126) */
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 127) DRM_DEBUG_ATOMIC("PLANE: %s and PLANE: %s are configured same zpos: %d.\n",
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 128) a->name, b->name, node->base.zpos);
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 129) return -EINVAL;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 130) }
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 131) }
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 132)
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 133) return 0;
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 134) }
109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 135)
:::::: The code at line 121 was first introduced by commit
:::::: 109bd7d5f4c2db66541272e5a41aeabd6cfeef95 drm/komeda: Adds zorder support
:::::: TO: Lowry Li (Arm Technology China) <Lowry.Li@arm.com>
:::::: CC: Liviu Dudau <Liviu.Dudau@arm.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2022-01-22 20:15 [jimc:dd-drm-rfc 13/18] drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: warning: Value stored to 'a' during its initialization is never read [clang-analyzer-deadcode.DeadStores] kernel test robot
2022-01-25 14:43 kernel test robot
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