drivers/gpu/drm/msm/dp/dp_display.c:496:19: warning: variable 'hpd' set but not used

From: kernel test robot
Date: Mon Dec 21 2020 - 02:02:01 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 467f8165a2b0e6accf3d0dd9c8089b1dbde29f7f
commit: c58eb1b54feefc3a47fab78addd14083bc941c44 drm/msm/dp: fix connect/disconnect handled at irq_hpd
date: 3 weeks ago
config: arm-randconfig-r035-20201220 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
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/torvalds/linux.git/commit/?id=c58eb1b54feefc3a47fab78addd14083bc941c44
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout c58eb1b54feefc3a47fab78addd14083bc941c44
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

drivers/gpu/drm/msm/dp/dp_display.c: In function 'dp_display_usbpd_attention_cb':
>> drivers/gpu/drm/msm/dp/dp_display.c:496:19: warning: variable 'hpd' set but not used [-Wunused-but-set-variable]
496 | struct dp_usbpd *hpd;
| ^~~


vim +/hpd +496 drivers/gpu/drm/msm/dp/dp_display.c

c943b4948b5848f Chandan Uddaraju 2020-08-27 490
c943b4948b5848f Chandan Uddaraju 2020-08-27 491 static int dp_display_usbpd_attention_cb(struct device *dev)
c943b4948b5848f Chandan Uddaraju 2020-08-27 492 {
c943b4948b5848f Chandan Uddaraju 2020-08-27 493 int rc = 0;
26b8d66a399e625 Kuogee Hsieh 2020-11-03 494 u32 sink_request;
c943b4948b5848f Chandan Uddaraju 2020-08-27 495 struct dp_display_private *dp;
26b8d66a399e625 Kuogee Hsieh 2020-11-03 @496 struct dp_usbpd *hpd;
c943b4948b5848f Chandan Uddaraju 2020-08-27 497
c943b4948b5848f Chandan Uddaraju 2020-08-27 498 if (!dev) {
c943b4948b5848f Chandan Uddaraju 2020-08-27 499 DRM_ERROR("invalid dev\n");
c943b4948b5848f Chandan Uddaraju 2020-08-27 500 return -EINVAL;
c943b4948b5848f Chandan Uddaraju 2020-08-27 501 }
c943b4948b5848f Chandan Uddaraju 2020-08-27 502
061eb621fc2780a Abhinav Kumar 2020-09-12 503 dp = container_of(g_dp_display,
061eb621fc2780a Abhinav Kumar 2020-09-12 504 struct dp_display_private, dp_display);
c943b4948b5848f Chandan Uddaraju 2020-08-27 505 if (!dp) {
c943b4948b5848f Chandan Uddaraju 2020-08-27 506 DRM_ERROR("no driver data found\n");
c943b4948b5848f Chandan Uddaraju 2020-08-27 507 return -ENODEV;
c943b4948b5848f Chandan Uddaraju 2020-08-27 508 }
c943b4948b5848f Chandan Uddaraju 2020-08-27 509
26b8d66a399e625 Kuogee Hsieh 2020-11-03 510 hpd = dp->usbpd;
26b8d66a399e625 Kuogee Hsieh 2020-11-03 511
c943b4948b5848f Chandan Uddaraju 2020-08-27 512 /* check for any test request issued by sink */
8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 513 rc = dp_link_process_request(dp->link);
26b8d66a399e625 Kuogee Hsieh 2020-11-03 514 if (!rc) {
26b8d66a399e625 Kuogee Hsieh 2020-11-03 515 sink_request = dp->link->sink_request;
c58eb1b54feefc3 Kuogee Hsieh 2020-11-18 516 if (sink_request & DS_PORT_STATUS_CHANGED)
c58eb1b54feefc3 Kuogee Hsieh 2020-11-18 517 rc = dp_display_handle_port_ststus_changed(dp);
c58eb1b54feefc3 Kuogee Hsieh 2020-11-18 518 else
26b8d66a399e625 Kuogee Hsieh 2020-11-03 519 rc = dp_display_handle_irq_hpd(dp);
26b8d66a399e625 Kuogee Hsieh 2020-11-03 520 }
c943b4948b5848f Chandan Uddaraju 2020-08-27 521
8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 522 return rc;
c943b4948b5848f Chandan Uddaraju 2020-08-27 523 }
c943b4948b5848f Chandan Uddaraju 2020-08-27 524

:::::: The code at line 496 was first introduced by commit
:::::: 26b8d66a399e625f3aa2c02ccbab1bff2e00040c drm/msm/dp: promote irq_hpd handle to handle link training correctly

:::::: TO: Kuogee Hsieh <khsieh@xxxxxxxxxxxxxx>
:::::: CC: Rob Clark <robdclark@xxxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
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