[chrome-os:chromeos-6.6 16/16] drivers/gpu/drm/bridge/analogix/anx7625.c:2789:24: warning: variable 'dev' set but not used

[kernel test robot <lkp@intel.com>]

tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-6.6
head:   699322c13fb8c58442ef1b7956a600d27be2a27a
commit: 699322c13fb8c58442ef1b7956a600d27be2a27a [16/16] CHROMIUM: drm/bridge: anx7625: Fix bandwidth mismatch issue
config: x86_64-buildonly-randconfig-001-20250325 (https://download.01.org/0day-ci/archive/20250325/202503251239.pjXlbVph-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250325/202503251239.pjXlbVph-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503251239.pjXlbVph-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/bridge/analogix/anx7625.c: In function 'lt_check_work_func':
>> drivers/gpu/drm/bridge/analogix/anx7625.c:2789:24: warning: variable 'dev' set but not used [-Wunused-but-set-variable]
    2789 |         struct device *dev;
         |                        ^~~


vim +/dev +2789 drivers/gpu/drm/bridge/analogix/anx7625.c

  2784	
  2785	static void lt_check_work_func(struct work_struct *work)
  2786	{
  2787		struct delayed_work *dwork;
  2788		struct anx7625_data *ctx;
> 2789		struct device *dev;
  2790		int ret;
  2791		u8 lanes, rate;
  2792		u32 downstream_max_pixel_clock;
  2793		u8 data[2];
  2794		struct drm_connector *conn;
  2795	
  2796		dwork = to_delayed_work(work);
  2797		ctx = container_of(dwork, struct anx7625_data, lt_check_work);
  2798		dev = ctx->dev;
  2799	
  2800		if (!ctx->connector)
  2801			return;
  2802	
  2803		conn = ctx->connector;
  2804	
  2805		ret = anx7625_reg_block_read(ctx, ctx->i2c.tx_p0_client, 0xa0, 2, data);
  2806		if (ret < 0)
  2807			return;
  2808	
  2809		lanes = data[1] & 0x1F;
  2810		rate = data[0];
  2811		/*
  2812		 * Lane rate equals 0x19 and lane count equals 1
  2813		 * indicate OCM failed to do link training, then just
  2814		 * reset lane count and lane speed to 0.
  2815		 */
  2816		if (lanes == 1 && rate == 0x19) {
  2817			lanes = 0;
  2818			rate = 0;
  2819		}
  2820	
  2821		downstream_max_pixel_clock = anx7625_get_pixel_clock(lanes, rate);
  2822	
  2823		if (downstream_max_pixel_clock > ctx->dt.pixelclock.min)
  2824			return;
  2825	
  2826		/* Grab the locks before changing connector property */
  2827		mutex_lock(&conn->dev->mode_config.mutex);
  2828		/*
  2829		 * Set connector link status to BAD and send a Uevent to notify
  2830		 * userspace to do a modeset.
  2831		 */
  2832		drm_connector_set_link_status_property(conn, DRM_MODE_LINK_STATUS_BAD);
  2833		mutex_unlock(&conn->dev->mode_config.mutex);
  2834		/* Send Hotplug uevent so userspace can reprobe */
  2835		drm_kms_helper_hotplug_event(ctx->bridge.dev);
  2836	}
  2837	

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