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Message-ID: <202205210945.hUK3CONa-lkp@intel.com>
Date: Sat, 21 May 2022 09:57:42 +0800
From: kernel test robot <lkp@...el.com>
To: Neal Liu <neal_liu@...eedtech.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzk@...nel.org>,
Joel Stanley <joel@....id.au>,
Andrew Jeffery <andrew@...id.au>,
Felipe Balbi <balbi@...nel.org>,
Sumit Semwal <sumit.semwal@...aro.org>,
Christian König <christian.koenig@....com>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Li Yang <leoyang.li@....com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
Neal Liu <neal_liu@...eedtech.com>,
linux-aspeed@...ts.ozlabs.org, linux-usb@...r.kernel.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH v4 1/3] usb: gadget: add Aspeed ast2600 udc driver
Hi Neal,
I love your patch! Perhaps something to improve:
[auto build test WARNING on usb/usb-testing]
[also build test WARNING on robh/for-next v5.18-rc7 next-20220520]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/intel-lab-lkp/linux/commits/Neal-Liu/add-Aspeed-udc-driver-for-ast2600/20220520-170904
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20220521/202205210945.hUK3CONa-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project e00cbbec06c08dc616a0d52a20f678b8fbd4e304)
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/intel-lab-lkp/linux/commit/19f3e863ea1b55f570db57febb96c6e8cb39c145
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Neal-Liu/add-Aspeed-udc-driver-for-ast2600/20220520-170904
git checkout 19f3e863ea1b55f570db57febb96c6e8cb39c145
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/clk/ drivers/usb/gadget/udc/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> drivers/usb/gadget/udc/aspeed_udc.c:310:11: warning: comparison of address of 'ep->queue' equal to a null pointer is always false [-Wtautological-pointer-compare]
if (&ep->queue == NULL)
~~~~^~~~~ ~~~~
>> drivers/usb/gadget/udc/aspeed_udc.c:967:7: warning: variable 'len' is uninitialized when used here [-Wuninitialized]
if (len < ep->ep.maxpacket) {
^~~
drivers/usb/gadget/udc/aspeed_udc.c:908:9: note: initialize the variable 'len' to silence this warning
u16 len;
^
= 0
>> drivers/usb/gadget/udc/aspeed_udc.c:1011:7: warning: variable 'epnum' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
case USB_RECIP_INTERFACE:
^~~~~~~~~~~~~~~~~~~
include/uapi/linux/usb/ch9.h:67:30: note: expanded from macro 'USB_RECIP_INTERFACE'
#define USB_RECIP_INTERFACE 0x01
^~~~
drivers/usb/gadget/udc/aspeed_udc.c:1021:16: note: uninitialized use occurs here
ep = &udc->ep[epnum];
^~~~~
drivers/usb/gadget/udc/aspeed_udc.c:1007:7: warning: variable 'epnum' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
case USB_RECIP_DEVICE:
^~~~~~~~~~~~~~~~
include/uapi/linux/usb/ch9.h:66:27: note: expanded from macro 'USB_RECIP_DEVICE'
#define USB_RECIP_DEVICE 0x00
^~~~
drivers/usb/gadget/udc/aspeed_udc.c:1021:16: note: uninitialized use occurs here
ep = &udc->ep[epnum];
^~~~~
drivers/usb/gadget/udc/aspeed_udc.c:1002:11: note: initialize the variable 'epnum' to silence this warning
u16 epnum;
^
= 0
>> drivers/usb/gadget/udc/aspeed_udc.c:1096:6: warning: variable 'rc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (udc->driver) {
^~~~~~~~~~~
drivers/usb/gadget/udc/aspeed_udc.c:1108:6: note: uninitialized use occurs here
if (rc >= 0)
^~
drivers/usb/gadget/udc/aspeed_udc.c:1096:2: note: remove the 'if' if its condition is always true
if (udc->driver) {
^~~~~~~~~~~~~~~~~
drivers/usb/gadget/udc/aspeed_udc.c:1039:8: note: initialize the variable 'rc' to silence this warning
int rc;
^
= 0
5 warnings generated.
vim +310 drivers/usb/gadget/udc/aspeed_udc.c
304
305 static void ast_udc_nuke(struct ast_udc_ep *ep, int status)
306 {
307 int count = 0;
308
309 /* Sanity check */
> 310 if (&ep->queue == NULL)
311 return;
312
313 while (!list_empty(&ep->queue)) {
314 struct ast_udc_request *req;
315
316 req = list_entry(ep->queue.next, struct ast_udc_request,
317 queue);
318 ast_udc_done(ep, req, status);
319 count++;
320 }
321
322 if (count)
323 EP_DBG(ep, "Nuked %d request(s)\n", count);
324 }
325
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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