From: kernel test robot <lkp@intel.com>
To: Rui Miguel Silva <rui.silva@linaro.org>
Cc: clang-built-linux@googlegroups.com, kbuild-all@lists.01.org,
linux-usb@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [usb:usb-testing 54/97] drivers/usb/isp1760/isp1760-hcd.c:735:2: warning: Value stored to 'scratch' is never read [clang-analyzer-deadcode.DeadStores]
Date: Thu, 19 Aug 2021 06:09:39 +0800 [thread overview]
Message-ID: <202108190619.wLK5u4fO-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 22764 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
head: e4788edc730a0d2b26e1ae1f08fbb3f635b92dbb
commit: 7de14c88272c05d86fce83a5cead36832ce3a424 [54/97] usb: isp1760: remove debug message as error
config: riscv-randconfig-c006-20210818 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d2b574a4dea5b718e4386bf2e26af0126e5978ce)
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
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?id=7de14c88272c05d86fce83a5cead36832ce3a424
git remote add usb https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
git fetch --no-tags usb usb-testing
git checkout 7de14c88272c05d86fce83a5cead36832ce3a424
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 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 >>)
^ ~
drivers/target/target_core_configfs.c:2627:23: warning: Value stored to 'alua_lu_gp_cg' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
^~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:2627:23: note: Value stored to 'alua_lu_gp_cg' during its initialization is never read
struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
^~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:2731:2: warning: Value stored to 'alua_lu_gp_ci' is never read [clang-analyzer-deadcode.DeadStores]
alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
^ ~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:2731:2: note: Value stored to 'alua_lu_gp_ci' is never read
alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
^ ~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:2748:25: warning: Value stored to 'lu_gp' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
^~~~~
drivers/target/target_core_configfs.c:2748:25: note: Value stored to 'lu_gp' during its initialization is never read
struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
^~~~~
drivers/target/target_core_configfs.c:3026:23: warning: Value stored to 'alua_tg_pt_gp_cg' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
^~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3026:23: note: Value stored to 'alua_tg_pt_gp_cg' during its initialization is never read
struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
^~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3163:2: warning: Value stored to 'alua_tg_pt_gp_ci' is never read [clang-analyzer-deadcode.DeadStores]
alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3163:2: note: Value stored to 'alua_tg_pt_gp_ci' is never read
alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3179:28: warning: Value stored to 'tg_pt_gp' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
^~~~~~~~
drivers/target/target_core_configfs.c:3179:28: note: Value stored to 'tg_pt_gp' during its initialization is never read
struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
^~~~~~~~
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.
6 warnings generated.
drivers/misc/eeprom/at24.c:334:2: warning: Value stored to 'client' is never read [clang-analyzer-deadcode.DeadStores]
client = at24_client->client;
^ ~~~~~~~~~~~~~~~~~~~
drivers/misc/eeprom/at24.c:334:2: note: Value stored to 'client' is never read
client = at24_client->client;
^ ~~~~~~~~~~~~~~~~~~~
drivers/misc/eeprom/at24.c:397:2: warning: Value stored to 'client' is never read [clang-analyzer-deadcode.DeadStores]
client = at24_client->client;
^ ~~~~~~~~~~~~~~~~~~~
drivers/misc/eeprom/at24.c:397:2: note: Value stored to 'client' is never read
client = at24_client->client;
^ ~~~~~~~~~~~~~~~~~~~
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.
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.
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.
drivers/usb/isp1760/isp1760-core.c:490:2: warning: Value stored to 'udc_enabled' is never read [clang-analyzer-deadcode.DeadStores]
udc_enabled = ((devflags & ISP1760_FLAG_ISP1763) ||
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-core.c:490:2: note: Value stored to 'udc_enabled' is never read
udc_enabled = ((devflags & ISP1760_FLAG_ISP1763) ||
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
9 warnings generated.
>> drivers/usb/isp1760/isp1760-hcd.c:735:2: warning: Value stored to 'scratch' is never read [clang-analyzer-deadcode.DeadStores]
scratch = isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:735:2: note: Value stored to 'scratch' is never read
scratch = isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1855:38: warning: Division by zero [clang-analyzer-core.DivideZero]
&& !(urb->transfer_buffer_length %
^
drivers/usb/isp1760/isp1760-hcd.c:1887:2: note: Control jumps to 'case 3:' at line 1891
switch (usb_pipetype(urb->pipe)) {
^
drivers/usb/isp1760/isp1760-hcd.c:1893:3: note: Execution continues on line 1911
break;
^
drivers/usb/isp1760/isp1760-hcd.c:1911:6: note: Assuming the condition is false
if (usb_pipein(urb->pipe))
^
include/linux/usb.h:1937:27: note: expanded from macro 'usb_pipein'
#define usb_pipein(pipe) ((pipe) & USB_DIR_IN)
^~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1911:2: note: Taking false branch
if (usb_pipein(urb->pipe))
^
drivers/usb/isp1760/isp1760-hcd.c:1914:2: note: Calling 'packetize_urb'
packetize_urb(hcd, urb, &new_qtds, mem_flags);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1783:6: note: Assuming field 'transfer_buffer' is non-null
if (!urb->transfer_buffer && urb->transfer_buffer_length) {
^~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1783:28: note: Left side of '&&' is false
if (!urb->transfer_buffer && urb->transfer_buffer_length) {
^
drivers/usb/isp1760/isp1760-hcd.c:1792:2: note: Taking false branch
if (usb_pipein(urb->pipe))
^
drivers/usb/isp1760/isp1760-hcd.c:1797:2: note: Taking false branch
if (usb_pipecontrol(urb->pipe)) {
^
drivers/usb/isp1760/isp1760-hcd.c:1809:2: note: The value 0 is assigned to 'maxpacketsize'
maxpacketsize = max_packet(usb_maxpacket(urb->dev, urb->pipe,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1820:2: note: Loop condition is true. Entering loop body
for (;;) {
^
drivers/usb/isp1760/isp1760-hcd.c:1823:9: note: Calling 'qtd_alloc'
qtd = qtd_alloc(flags, urb, packet_type);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:980:6: note: Assuming 'qtd' is non-null, which participates in a condition later
if (!qtd)
^~~~
drivers/usb/isp1760/isp1760-hcd.c:980:2: note: Taking false branch
if (!qtd)
^
drivers/usb/isp1760/isp1760-hcd.c:989:2: note: Returning pointer (loaded from 'qtd'), which participates in a condition later
return qtd;
^~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1823:9: note: Returning from 'qtd_alloc'
qtd = qtd_alloc(flags, urb, packet_type);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1824:8: note: 'qtd' is non-null
if (!qtd)
^~~
drivers/usb/isp1760/isp1760-hcd.c:1824:3: note: Taking false branch
if (!qtd)
^
drivers/usb/isp1760/isp1760-hcd.c:1827:7: note: Assuming the condition is false
if (len > mem->blocks_size[ISP176x_BLOCK_NUM - 1])
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1827:3: note: Taking false branch
if (len > mem->blocks_size[ISP176x_BLOCK_NUM - 1])
^
drivers/usb/isp1760/isp1760-hcd.c:1836:7: note: 'len' is <= 0
if (len <= 0)
^~~
drivers/usb/isp1760/isp1760-hcd.c:1836:3: note: Taking true branch
if (len <= 0)
^
drivers/usb/isp1760/isp1760-hcd.c:1837:4: note: Execution continues on line 1844
break;
^
drivers/usb/isp1760/isp1760-hcd.c:1844:6: note: Assuming field 'transfer_buffer_length' is not equal to 0
if (urb->transfer_buffer_length != 0) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1844:2: note: Taking true branch
if (urb->transfer_buffer_length != 0) {
^
drivers/usb/isp1760/isp1760-hcd.c:1847:7: note: Assuming the condition is false
if (usb_pipecontrol(urb->pipe)) {
^
include/linux/usb.h:1946:32: note: expanded from macro 'usb_pipecontrol'
#define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/usb.h:1943:28: note: expanded from macro 'usb_pipetype'
#define usb_pipetype(pipe) (((pipe) >> 30) & 3)
^
drivers/usb/isp1760/isp1760-hcd.c:1847:3: note: Taking false branch
if (usb_pipecontrol(urb->pipe)) {
^
drivers/usb/isp1760/isp1760-hcd.c:1853:14: note: Assuming the condition is true
} else if (usb_pipebulk(urb->pipe)
vim +/scratch +735 drivers/usb/isp1760/isp1760-hcd.c
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 718
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 719 static int isp1760_hc_setup(struct usb_hcd *hcd)
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 720 {
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 721 struct isp1760_hcd *priv = hcd_to_priv(hcd);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 722 u32 atx_reset;
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 723 int result;
1da9e1c0687335 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 724 u32 scratch;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 725 u32 pattern;
1da9e1c0687335 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 726
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 727 if (priv->is_isp1763)
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 728 pattern = 0xcafe;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 729 else
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 730 pattern = 0xdeadcafe;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 731
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 732 isp1760_hcd_write(hcd, HC_SCRATCH, pattern);
3faefc88c1a32b drivers/usb/host/isp1760-hcd.c Nate Case 2008-06-17 733
3faefc88c1a32b drivers/usb/host/isp1760-hcd.c Nate Case 2008-06-17 734 /* Change bus pattern */
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 @735 scratch = isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 736 scratch = isp1760_hcd_read(hcd, HC_SCRATCH);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 737 if (scratch != pattern) {
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 738 dev_err(hcd->self.controller, "Scratch test failed. 0x%08x\n", scratch);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 739 return -ENODEV;
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 740 }
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 741
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 742 /*
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 743 * The RESET_HC bit in the SW_RESET register is supposed to reset the
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 744 * host controller without touching the CPU interface registers, but at
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 745 * least on the ISP1761 it seems to behave as the RESET_ALL bit and
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 746 * reset the whole device. We thus can't use it here, so let's reset
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 747 * the host controller through the EHCI USB Command register. The device
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 748 * has been reset in core code anyway, so this shouldn't matter.
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 749 */
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 750 isp1760_hcd_clear(hcd, ISO_BUF_FILL);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 751 isp1760_hcd_clear(hcd, INT_BUF_FILL);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 752 isp1760_hcd_clear(hcd, ATL_BUF_FILL);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 753
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 754 isp1760_hcd_set(hcd, HC_ATL_PTD_SKIPMAP);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 755 isp1760_hcd_set(hcd, HC_INT_PTD_SKIPMAP);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 756 isp1760_hcd_set(hcd, HC_ISO_PTD_SKIPMAP);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 757
6bda21bc0941c1 drivers/usb/host/isp1760-hcd.c Arvid Brodin 2011-02-26 758 result = ehci_reset(hcd);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 759 if (result)
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 760 return result;
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 761
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 762 /* Step 11 passed */
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 763
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 764 /* ATL reset */
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 765 if (priv->is_isp1763)
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 766 atx_reset = SW_RESET_RESET_ATX;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 767 else
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 768 atx_reset = ALL_ATX_RESET;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 769
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 770 isp1760_hcd_set(hcd, atx_reset);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 771 mdelay(10);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 772 isp1760_hcd_clear(hcd, atx_reset);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 773
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 774 if (priv->is_isp1763) {
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 775 isp1760_hcd_set(hcd, HW_OTG_DISABLE);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 776 isp1760_hcd_set(hcd, HW_SW_SEL_HC_DC_CLEAR);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 777 isp1760_hcd_set(hcd, HW_HC_2_DIS_CLEAR);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 778 mdelay(10);
3faefc88c1a32b drivers/usb/host/isp1760-hcd.c Nate Case 2008-06-17 779
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 780 isp1760_hcd_set(hcd, HW_INTF_LOCK);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 781 }
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 782
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 783 isp1760_hcd_set(hcd, HC_INT_IRQ_ENABLE);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 784 isp1760_hcd_set(hcd, HC_ATL_IRQ_ENABLE);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 785
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 786 return priv_init(hcd);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 787 }
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 788
:::::: The code at line 735 was first introduced by commit
:::::: 60d789f3bfbb7428e6ba2949de70a6db8e12e8fa usb: isp1760: add support for isp1763
:::::: TO: Rui Miguel Silva <rui.silva@linaro.org>
:::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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WARNING: multiple messages have this Message-ID (diff)
From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: [usb:usb-testing 54/97] drivers/usb/isp1760/isp1760-hcd.c:735:2: warning: Value stored to 'scratch' is never read [clang-analyzer-deadcode.DeadStores]
Date: Thu, 19 Aug 2021 06:09:39 +0800 [thread overview]
Message-ID: <202108190619.wLK5u4fO-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 23073 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
head: e4788edc730a0d2b26e1ae1f08fbb3f635b92dbb
commit: 7de14c88272c05d86fce83a5cead36832ce3a424 [54/97] usb: isp1760: remove debug message as error
config: riscv-randconfig-c006-20210818 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d2b574a4dea5b718e4386bf2e26af0126e5978ce)
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
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?id=7de14c88272c05d86fce83a5cead36832ce3a424
git remote add usb https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
git fetch --no-tags usb usb-testing
git checkout 7de14c88272c05d86fce83a5cead36832ce3a424
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 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 >>)
^ ~
drivers/target/target_core_configfs.c:2627:23: warning: Value stored to 'alua_lu_gp_cg' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
^~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:2627:23: note: Value stored to 'alua_lu_gp_cg' during its initialization is never read
struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
^~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:2731:2: warning: Value stored to 'alua_lu_gp_ci' is never read [clang-analyzer-deadcode.DeadStores]
alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
^ ~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:2731:2: note: Value stored to 'alua_lu_gp_ci' is never read
alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
^ ~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:2748:25: warning: Value stored to 'lu_gp' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
^~~~~
drivers/target/target_core_configfs.c:2748:25: note: Value stored to 'lu_gp' during its initialization is never read
struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
^~~~~
drivers/target/target_core_configfs.c:3026:23: warning: Value stored to 'alua_tg_pt_gp_cg' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
^~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3026:23: note: Value stored to 'alua_tg_pt_gp_cg' during its initialization is never read
struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
^~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3163:2: warning: Value stored to 'alua_tg_pt_gp_ci' is never read [clang-analyzer-deadcode.DeadStores]
alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3163:2: note: Value stored to 'alua_tg_pt_gp_ci' is never read
alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3179:28: warning: Value stored to 'tg_pt_gp' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
^~~~~~~~
drivers/target/target_core_configfs.c:3179:28: note: Value stored to 'tg_pt_gp' during its initialization is never read
struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
^~~~~~~~
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.
6 warnings generated.
drivers/misc/eeprom/at24.c:334:2: warning: Value stored to 'client' is never read [clang-analyzer-deadcode.DeadStores]
client = at24_client->client;
^ ~~~~~~~~~~~~~~~~~~~
drivers/misc/eeprom/at24.c:334:2: note: Value stored to 'client' is never read
client = at24_client->client;
^ ~~~~~~~~~~~~~~~~~~~
drivers/misc/eeprom/at24.c:397:2: warning: Value stored to 'client' is never read [clang-analyzer-deadcode.DeadStores]
client = at24_client->client;
^ ~~~~~~~~~~~~~~~~~~~
drivers/misc/eeprom/at24.c:397:2: note: Value stored to 'client' is never read
client = at24_client->client;
^ ~~~~~~~~~~~~~~~~~~~
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.
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.
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.
drivers/usb/isp1760/isp1760-core.c:490:2: warning: Value stored to 'udc_enabled' is never read [clang-analyzer-deadcode.DeadStores]
udc_enabled = ((devflags & ISP1760_FLAG_ISP1763) ||
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-core.c:490:2: note: Value stored to 'udc_enabled' is never read
udc_enabled = ((devflags & ISP1760_FLAG_ISP1763) ||
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
9 warnings generated.
>> drivers/usb/isp1760/isp1760-hcd.c:735:2: warning: Value stored to 'scratch' is never read [clang-analyzer-deadcode.DeadStores]
scratch = isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:735:2: note: Value stored to 'scratch' is never read
scratch = isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1855:38: warning: Division by zero [clang-analyzer-core.DivideZero]
&& !(urb->transfer_buffer_length %
^
drivers/usb/isp1760/isp1760-hcd.c:1887:2: note: Control jumps to 'case 3:' at line 1891
switch (usb_pipetype(urb->pipe)) {
^
drivers/usb/isp1760/isp1760-hcd.c:1893:3: note: Execution continues on line 1911
break;
^
drivers/usb/isp1760/isp1760-hcd.c:1911:6: note: Assuming the condition is false
if (usb_pipein(urb->pipe))
^
include/linux/usb.h:1937:27: note: expanded from macro 'usb_pipein'
#define usb_pipein(pipe) ((pipe) & USB_DIR_IN)
^~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1911:2: note: Taking false branch
if (usb_pipein(urb->pipe))
^
drivers/usb/isp1760/isp1760-hcd.c:1914:2: note: Calling 'packetize_urb'
packetize_urb(hcd, urb, &new_qtds, mem_flags);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1783:6: note: Assuming field 'transfer_buffer' is non-null
if (!urb->transfer_buffer && urb->transfer_buffer_length) {
^~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1783:28: note: Left side of '&&' is false
if (!urb->transfer_buffer && urb->transfer_buffer_length) {
^
drivers/usb/isp1760/isp1760-hcd.c:1792:2: note: Taking false branch
if (usb_pipein(urb->pipe))
^
drivers/usb/isp1760/isp1760-hcd.c:1797:2: note: Taking false branch
if (usb_pipecontrol(urb->pipe)) {
^
drivers/usb/isp1760/isp1760-hcd.c:1809:2: note: The value 0 is assigned to 'maxpacketsize'
maxpacketsize = max_packet(usb_maxpacket(urb->dev, urb->pipe,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1820:2: note: Loop condition is true. Entering loop body
for (;;) {
^
drivers/usb/isp1760/isp1760-hcd.c:1823:9: note: Calling 'qtd_alloc'
qtd = qtd_alloc(flags, urb, packet_type);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:980:6: note: Assuming 'qtd' is non-null, which participates in a condition later
if (!qtd)
^~~~
drivers/usb/isp1760/isp1760-hcd.c:980:2: note: Taking false branch
if (!qtd)
^
drivers/usb/isp1760/isp1760-hcd.c:989:2: note: Returning pointer (loaded from 'qtd'), which participates in a condition later
return qtd;
^~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1823:9: note: Returning from 'qtd_alloc'
qtd = qtd_alloc(flags, urb, packet_type);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1824:8: note: 'qtd' is non-null
if (!qtd)
^~~
drivers/usb/isp1760/isp1760-hcd.c:1824:3: note: Taking false branch
if (!qtd)
^
drivers/usb/isp1760/isp1760-hcd.c:1827:7: note: Assuming the condition is false
if (len > mem->blocks_size[ISP176x_BLOCK_NUM - 1])
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1827:3: note: Taking false branch
if (len > mem->blocks_size[ISP176x_BLOCK_NUM - 1])
^
drivers/usb/isp1760/isp1760-hcd.c:1836:7: note: 'len' is <= 0
if (len <= 0)
^~~
drivers/usb/isp1760/isp1760-hcd.c:1836:3: note: Taking true branch
if (len <= 0)
^
drivers/usb/isp1760/isp1760-hcd.c:1837:4: note: Execution continues on line 1844
break;
^
drivers/usb/isp1760/isp1760-hcd.c:1844:6: note: Assuming field 'transfer_buffer_length' is not equal to 0
if (urb->transfer_buffer_length != 0) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:1844:2: note: Taking true branch
if (urb->transfer_buffer_length != 0) {
^
drivers/usb/isp1760/isp1760-hcd.c:1847:7: note: Assuming the condition is false
if (usb_pipecontrol(urb->pipe)) {
^
include/linux/usb.h:1946:32: note: expanded from macro 'usb_pipecontrol'
#define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/usb.h:1943:28: note: expanded from macro 'usb_pipetype'
#define usb_pipetype(pipe) (((pipe) >> 30) & 3)
^
drivers/usb/isp1760/isp1760-hcd.c:1847:3: note: Taking false branch
if (usb_pipecontrol(urb->pipe)) {
^
drivers/usb/isp1760/isp1760-hcd.c:1853:14: note: Assuming the condition is true
} else if (usb_pipebulk(urb->pipe)
vim +/scratch +735 drivers/usb/isp1760/isp1760-hcd.c
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 718
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 719 static int isp1760_hc_setup(struct usb_hcd *hcd)
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 720 {
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 721 struct isp1760_hcd *priv = hcd_to_priv(hcd);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 722 u32 atx_reset;
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 723 int result;
1da9e1c0687335 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 724 u32 scratch;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 725 u32 pattern;
1da9e1c0687335 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 726
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 727 if (priv->is_isp1763)
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 728 pattern = 0xcafe;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 729 else
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 730 pattern = 0xdeadcafe;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 731
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 732 isp1760_hcd_write(hcd, HC_SCRATCH, pattern);
3faefc88c1a32b drivers/usb/host/isp1760-hcd.c Nate Case 2008-06-17 733
3faefc88c1a32b drivers/usb/host/isp1760-hcd.c Nate Case 2008-06-17 734 /* Change bus pattern */
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 @735 scratch = isp1760_hcd_read(hcd, HC_CHIP_ID_HIGH);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 736 scratch = isp1760_hcd_read(hcd, HC_SCRATCH);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 737 if (scratch != pattern) {
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 738 dev_err(hcd->self.controller, "Scratch test failed. 0x%08x\n", scratch);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 739 return -ENODEV;
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 740 }
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 741
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 742 /*
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 743 * The RESET_HC bit in the SW_RESET register is supposed to reset the
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 744 * host controller without touching the CPU interface registers, but at
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 745 * least on the ISP1761 it seems to behave as the RESET_ALL bit and
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 746 * reset the whole device. We thus can't use it here, so let's reset
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 747 * the host controller through the EHCI USB Command register. The device
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 748 * has been reset in core code anyway, so this shouldn't matter.
5171446a3aec60 drivers/usb/host/isp1760-hcd.c Laurent Pinchart 2015-01-21 749 */
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 750 isp1760_hcd_clear(hcd, ISO_BUF_FILL);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 751 isp1760_hcd_clear(hcd, INT_BUF_FILL);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 752 isp1760_hcd_clear(hcd, ATL_BUF_FILL);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 753
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 754 isp1760_hcd_set(hcd, HC_ATL_PTD_SKIPMAP);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 755 isp1760_hcd_set(hcd, HC_INT_PTD_SKIPMAP);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 756 isp1760_hcd_set(hcd, HC_ISO_PTD_SKIPMAP);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 757
6bda21bc0941c1 drivers/usb/host/isp1760-hcd.c Arvid Brodin 2011-02-26 758 result = ehci_reset(hcd);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 759 if (result)
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 760 return result;
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 761
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 762 /* Step 11 passed */
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 763
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 764 /* ATL reset */
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 765 if (priv->is_isp1763)
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 766 atx_reset = SW_RESET_RESET_ATX;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 767 else
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 768 atx_reset = ALL_ATX_RESET;
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 769
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 770 isp1760_hcd_set(hcd, atx_reset);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 771 mdelay(10);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 772 isp1760_hcd_clear(hcd, atx_reset);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 773
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 774 if (priv->is_isp1763) {
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 775 isp1760_hcd_set(hcd, HW_OTG_DISABLE);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 776 isp1760_hcd_set(hcd, HW_SW_SEL_HC_DC_CLEAR);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 777 isp1760_hcd_set(hcd, HW_HC_2_DIS_CLEAR);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 778 mdelay(10);
3faefc88c1a32b drivers/usb/host/isp1760-hcd.c Nate Case 2008-06-17 779
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 780 isp1760_hcd_set(hcd, HW_INTF_LOCK);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 781 }
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 782
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 783 isp1760_hcd_set(hcd, HC_INT_IRQ_ENABLE);
60d789f3bfbb74 drivers/usb/isp1760/isp1760-hcd.c Rui Miguel Silva 2021-05-13 784 isp1760_hcd_set(hcd, HC_ATL_IRQ_ENABLE);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 785
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 786 return priv_init(hcd);
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 787 }
db11e47dd7b09b drivers/usb/host/isp1760-hcd.c Sebastian Siewior 2008-04-24 788
:::::: The code at line 735 was first introduced by commit
:::::: 60d789f3bfbb7428e6ba2949de70a6db8e12e8fa usb: isp1760: add support for isp1763
:::::: TO: Rui Miguel Silva <rui.silva@linaro.org>
:::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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next reply other threads:[~2021-08-18 22:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-18 22:09 kernel test robot [this message]
2021-08-18 22:09 ` [usb:usb-testing 54/97] drivers/usb/isp1760/isp1760-hcd.c:735:2: warning: Value stored to 'scratch' is never read [clang-analyzer-deadcode.DeadStores] kernel test robot
2021-08-19 7:47 ` Rui Miguel Silva
2021-08-19 7:47 ` Rui Miguel Silva
2021-08-19 14:59 ` Greg Kroah-Hartman
2021-08-19 14:59 ` Greg Kroah-Hartman
2021-08-19 15:06 ` Alan Stern
2021-08-19 15:06 ` Alan Stern
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