* drivers/video/fbdev/pm2fb.c:1064 pm2fb_sync() error: uninitialized symbol 'timeout_fifo'.
@ 2021-02-21 2:01 kernel test robot
0 siblings, 0 replies; 3+ messages in thread
From: kernel test robot @ 2021-02-21 2:01 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 3868 bytes --]
CC: kbuild-all(a)lists.01.org
TO: Tong Zhang <ztong0001@gmail.com>
CC: 0day robot <lkp@intel.com>
tree: https://github.com/0day-ci/linux/commits/UPDATE-20210221-080227/Tong-Zhang/video-fbdev-pm2fb-avoid-stall-on-fb_sync/20210221-070421
head: cf83deca80e53c5a8c9a0e43efcea8bf7306a7a7
commit: cf83deca80e53c5a8c9a0e43efcea8bf7306a7a7 video: fbdev: pm2fb: avoid stall on fb_sync
date: 2 hours ago
:::::: branch date: 2 hours ago
:::::: commit date: 2 hours ago
config: s390-randconfig-m031-20210221 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
smatch warnings:
drivers/video/fbdev/pm2fb.c:1064 pm2fb_sync() error: uninitialized symbol 'timeout_fifo'.
vim +/timeout_fifo +1064 drivers/video/fbdev/pm2fb.c
^1da177e4c3f41 drivers/video/pm2fb.c Linus Torvalds 2005-04-16 1041
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1042 static int pm2fb_sync(struct fb_info *info)
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1043 {
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1044 struct pm2fb_par *par = info->par;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1045 int timeout_sync = 10000;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1046 int timeout_fifo;
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1047
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1048 if (WAIT_FIFO_TIMEOUT(par, 1))
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1049 goto end;
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1050 pm2_WR(par, PM2R_SYNC, 0);
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1051 mb();
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1052 do {
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1053 timeout_fifo = 10000;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1054 while (pm2_RD(par, PM2R_OUT_FIFO_WORDS) == 0) {
6416ad73658336 drivers/video/pm2fb.c Krzysztof Helt 2007-10-16 1055 cpu_relax();
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1056 if (--timeout_fifo == 0)
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1057 goto end;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1058 }
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1059 if (pm2_RD(par, PM2R_OUT_FIFO) == PM2TAG(PM2R_SYNC))
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1060 break;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1061 } while (--timeout_sync > 0);
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1062
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1063 end:
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 @1064 if ((!timeout_sync) || (!timeout_fifo))
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1065 printk_ratelimited(KERN_WARNING "pm2fb: sync timeout!\n");
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1066 return 0;
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1067 }
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1068
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
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^ permalink raw reply [flat|nested] 3+ messages in thread
* drivers/video/fbdev/pm2fb.c:1064 pm2fb_sync() error: uninitialized symbol 'timeout_fifo'.
@ 2021-02-22 5:59 ` Dan Carpenter
0 siblings, 0 replies; 3+ messages in thread
From: Dan Carpenter @ 2021-02-22 5:59 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 3791 bytes --]
tree: https://github.com/0day-ci/linux/commits/UPDATE-20210221-080227/Tong-Zhang/video-fbdev-pm2fb-avoid-stall-on-fb_sync/20210221-070421
head: cf83deca80e53c5a8c9a0e43efcea8bf7306a7a7
commit: cf83deca80e53c5a8c9a0e43efcea8bf7306a7a7 video: fbdev: pm2fb: avoid stall on fb_sync
config: s390-randconfig-m031-20210221 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
smatch warnings:
drivers/video/fbdev/pm2fb.c:1064 pm2fb_sync() error: uninitialized symbol 'timeout_fifo'.
vim +/timeout_fifo +1064 drivers/video/fbdev/pm2fb.c
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1042 static int pm2fb_sync(struct fb_info *info)
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1043 {
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1044 struct pm2fb_par *par = info->par;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1045 int timeout_sync = 10000;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1046 int timeout_fifo;
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1047
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1048 if (WAIT_FIFO_TIMEOUT(par, 1))
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1049 goto end;
^^^^^^^^
Assume we hit this goto
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1050 pm2_WR(par, PM2R_SYNC, 0);
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1051 mb();
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1052 do {
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1053 timeout_fifo = 10000;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1054 while (pm2_RD(par, PM2R_OUT_FIFO_WORDS) == 0) {
6416ad73658336 drivers/video/pm2fb.c Krzysztof Helt 2007-10-16 1055 cpu_relax();
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1056 if (--timeout_fifo == 0)
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1057 goto end;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1058 }
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1059 if (pm2_RD(par, PM2R_OUT_FIFO) == PM2TAG(PM2R_SYNC))
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1060 break;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1061 } while (--timeout_sync > 0);
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1062
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1063 end:
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 @1064 if ((!timeout_sync) || (!timeout_fifo))
^^^^^^^^^^^^^
Uninitialized
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1065 printk_ratelimited(KERN_WARNING "pm2fb: sync timeout!\n");
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1066 return 0;
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1067 }
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 20477 bytes --]
^ permalink raw reply [flat|nested] 3+ messages in thread
* drivers/video/fbdev/pm2fb.c:1064 pm2fb_sync() error: uninitialized symbol 'timeout_fifo'.
@ 2021-02-22 5:59 ` Dan Carpenter
0 siblings, 0 replies; 3+ messages in thread
From: Dan Carpenter @ 2021-02-22 5:59 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 3791 bytes --]
tree: https://github.com/0day-ci/linux/commits/UPDATE-20210221-080227/Tong-Zhang/video-fbdev-pm2fb-avoid-stall-on-fb_sync/20210221-070421
head: cf83deca80e53c5a8c9a0e43efcea8bf7306a7a7
commit: cf83deca80e53c5a8c9a0e43efcea8bf7306a7a7 video: fbdev: pm2fb: avoid stall on fb_sync
config: s390-randconfig-m031-20210221 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
smatch warnings:
drivers/video/fbdev/pm2fb.c:1064 pm2fb_sync() error: uninitialized symbol 'timeout_fifo'.
vim +/timeout_fifo +1064 drivers/video/fbdev/pm2fb.c
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1042 static int pm2fb_sync(struct fb_info *info)
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1043 {
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1044 struct pm2fb_par *par = info->par;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1045 int timeout_sync = 10000;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1046 int timeout_fifo;
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1047
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1048 if (WAIT_FIFO_TIMEOUT(par, 1))
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1049 goto end;
^^^^^^^^
Assume we hit this goto
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1050 pm2_WR(par, PM2R_SYNC, 0);
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1051 mb();
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1052 do {
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1053 timeout_fifo = 10000;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1054 while (pm2_RD(par, PM2R_OUT_FIFO_WORDS) == 0) {
6416ad73658336 drivers/video/pm2fb.c Krzysztof Helt 2007-10-16 1055 cpu_relax();
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1056 if (--timeout_fifo == 0)
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1057 goto end;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1058 }
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1059 if (pm2_RD(par, PM2R_OUT_FIFO) == PM2TAG(PM2R_SYNC))
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1060 break;
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1061 } while (--timeout_sync > 0);
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1062
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1063 end:
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 @1064 if ((!timeout_sync) || (!timeout_fifo))
^^^^^^^^^^^^^
Uninitialized
cf83deca80e53c drivers/video/fbdev/pm2fb.c Tong Zhang 2021-02-20 1065 printk_ratelimited(KERN_WARNING "pm2fb: sync timeout!\n");
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1066 return 0;
03b9ae4b80dd5b drivers/video/pm2fb.c Antonino A. Daplas 2007-05-10 1067 }
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 20477 bytes --]
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2021-02-22 5:59 drivers/video/fbdev/pm2fb.c:1064 pm2fb_sync() error: uninitialized symbol 'timeout_fifo' Dan Carpenter
2021-02-22 5:59 ` Dan Carpenter
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