From: kernel test robot <lkp@intel.com>
To: Wesley Cheng <wcheng@codeaurora.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 3/89] drivers/usb/dwc3/gadget.c:687:2: warning: Value stored to 'dep' is never read [clang-analyzer-deadcode.DeadStores]
Date: Tue, 17 Aug 2021 12:39:08 +0800 [thread overview]
Message-ID: <202108171206.kZrE9r0u-lkp@intel.com> (raw)
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
head: 0d45a1373e669880b8beaecc8765f44cb0241e47
commit: 9f607a309fbe95fc1f77acce5af70766a7142537 [3/89] usb: dwc3: Resize TX FIFOs to meet EP bursting requirements
config: x86_64-randconfig-c007-20210816 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 44d0a99a12ec7ead4d2f5ef649ba05b40f6d463d)
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://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?id=9f607a309fbe95fc1f77acce5af70766a7142537
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 9f607a309fbe95fc1f77acce5af70766a7142537
# save the attached .config 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 >>)
^
drivers/hid/hid-dr.c:259:7: note: Assuming the condition is false
if (field->flags & HID_MAIN_ITEM_RELATIVE)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/hid/hid-dr.c:259:3: note: Taking false branch
if (field->flags & HID_MAIN_ITEM_RELATIVE)
^
drivers/hid/hid-dr.c:262:4: note: Calling 'hid_map_usage'
map_abs(usage->hid & 0xf);
^
drivers/hid/hid-dr.c:245:25: note: expanded from macro 'map_abs'
#define map_abs(c) hid_map_usage(hi, usage, bit, max, EV_ABS, (c))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/hid.h:982:2: note: 'input' initialized here
struct input_dev *input = hidinput->input;
^~~~~~~~~~~~~~~~~~~~~~~
include/linux/hid.h:986:2: note: Control jumps to 'case 3:' at line 987
switch (type) {
^
include/linux/hid.h:990:3: note: Execution continues on line 1005
break;
^
include/linux/hid.h:1005:15: note: 'c' is <= 'limit'
if (unlikely(c > limit || !bmap)) {
^
include/linux/compiler.h:78:42: note: expanded from macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
include/linux/hid.h:1005:15: note: Left side of '||' is false
if (unlikely(c > limit || !bmap)) {
^
include/linux/hid.h:1005:28: note: Assuming 'bmap' is null
if (unlikely(c > limit || !bmap)) {
^
include/linux/compiler.h:78:42: note: expanded from macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
include/linux/hid.h:1005:2: note: Taking true branch
if (unlikely(c > limit || !bmap)) {
^
include/linux/hid.h:1006:3: note: Assuming the condition is true
pr_warn_ratelimited("%s: Invalid code %d type %d\n",
^
include/linux/printk.h:557:2: note: expanded from macro 'pr_warn_ratelimited'
printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/printk.h:540:6: note: expanded from macro 'printk_ratelimited'
if (__ratelimit(&_rs)) \
^~~~~~~~~~~~~~~~~
include/linux/ratelimit_types.h:41:28: note: expanded from macro '__ratelimit'
#define __ratelimit(state) ___ratelimit(state, __func__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/hid.h:1006:3: note: Taking true branch
pr_warn_ratelimited("%s: Invalid code %d type %d\n",
^
include/linux/printk.h:557:2: note: expanded from macro 'pr_warn_ratelimited'
printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
^
include/linux/printk.h:540:2: note: expanded from macro 'printk_ratelimited'
if (__ratelimit(&_rs)) \
^
include/linux/hid.h:1007:9: note: Access to field 'name' results in a dereference of a null pointer (loaded from variable 'input')
input->name, c, type);
^
include/linux/printk.h:557:49: note: expanded from macro 'pr_warn_ratelimited'
printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~
include/linux/printk.h:541:17: note: expanded from macro 'printk_ratelimited'
printk(fmt, ##__VA_ARGS__); \
^~~~~~~~~~~
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.
2 warnings generated.
Suppressed 2 warnings (2 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.
2 warnings generated.
Suppressed 2 warnings (2 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.
2 warnings generated.
Suppressed 2 warnings (2 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.
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.
11 warnings generated.
Suppressed 11 warnings (11 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/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:3110:19: warning: Value stored to 'trb' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue];
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/dwc3/gadget.c:3110:19: note: Value stored to 'trb' during its initialization is never read
struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue];
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 4 warnings (3 in non-user code, 1 with check filters).
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.
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.
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.
11 warnings generated.
drivers/regulator/core.c:1109:2: warning: Value stored to 'count' is never read [clang-analyzer-deadcode.DeadStores]
count += scnprintf(buf + count, len - count, ", %s",
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/regulator/core.c:1109:2: note: Value stored to 'count' is never read
count += scnprintf(buf + count, len - count, ", %s",
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/regulator/core.c:3791:3: warning: Value stored to 'possible_uV' is never read [clang-analyzer-deadcode.DeadStores]
possible_uV = desired_min_uV;
^ ~~~~~~~~~~~~~~
drivers/regulator/core.c:3791:3: note: Value stored to 'possible_uV' is never read
possible_uV = desired_min_uV;
^ ~~~~~~~~~~~~~~
Suppressed 9 warnings (9 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.
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.
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.
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.
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.
8 warnings generated.
drivers/usb/host/xhci-dbgcap.c:828:4: warning: Value stored to 'ctrl' is never read [clang-analyzer-deadcode.DeadStores]
ctrl = readl(&dbc->regs->control);
^
drivers/usb/host/xhci-dbgcap.c:828:4: note: Value stored to 'ctrl' is never read
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.
include/uapi/linux/phonet.h:176:9: warning: 1st function call argument is an uninitialized value [clang-analyzer-core.CallAndMessage]
return pn_object(spn->spn_dev, spn->spn_obj);
^
net/phonet/pep.c:776:6: note: Assuming 'skb' is non-null
if (!skb)
^~~~
net/phonet/pep.c:776:2: note: Taking false branch
if (!skb)
^
net/phonet/pep.c:780:6: note: Assuming field 'skc_state' is equal to TCP_LISTEN
if (sk->sk_state != TCP_LISTEN) {
^~~~~~~~~~~~~~~~~~~~~~~~~~
net/phonet/pep.c:780:2: note: Taking false branch
vim +/dep +687 drivers/usb/dwc3/gadget.c
668
669 /**
670 * dwc3_gadget_clear_tx_fifo_size - Clears txfifo allocation
671 * @dwc: pointer to the DWC3 context
672 *
673 * Iterates through all the endpoint registers and clears the previous txfifo
674 * allocations.
675 */
676 void dwc3_gadget_clear_tx_fifos(struct dwc3 *dwc)
677 {
678 struct dwc3_ep *dep;
679 int fifo_depth;
680 int size;
681 int num;
682
683 if (!dwc->do_fifo_resize)
684 return;
685
686 /* Read ep0IN related TXFIFO size */
> 687 dep = dwc->eps[1];
688 size = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(0));
689 if (DWC3_IP_IS(DWC3))
690 fifo_depth = DWC3_GTXFIFOSIZ_TXFDEP(size);
691 else
692 fifo_depth = DWC31_GTXFIFOSIZ_TXFDEP(size);
693
694 dwc->last_fifo_depth = fifo_depth;
695 /* Clear existing TXFIFO for all IN eps except ep0 */
696 for (num = 3; num < min_t(int, dwc->num_eps, DWC3_ENDPOINTS_NUM);
697 num += 2) {
698 dep = dwc->eps[num];
699 /* Don't change TXFRAMNUM on usb31 version */
700 size = DWC3_IP_IS(DWC3) ? 0 :
701 dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(num >> 1)) &
702 DWC31_GTXFIFOSIZ_TXFRAMNUM;
703
704 dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(num >> 1), size);
705 }
706 dwc->num_ep_resized = 0;
707 }
708
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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reply other threads:[~2021-08-17 4:39 UTC|newest]
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