drm: print the current->comm alongside the pid

The question of "what process is this pid" keeps on popping up, so lets
print the process name alongside the pid.

Cc: Mauro Rossi <issor.oruam@gmail.com>
Cc: Bob Beckett <bob.beckett@collabora.com>
Cc: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200518083315.129948-1-emil.l.velikov@gmail.com

drivers/gpu/drm/drm_file.c

@@ -253,8 +253,8 @@ void drm_file_free(struct drm_file *file)
 
 	dev = file->minor->dev;
 
-	DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
-		  task_pid_nr(current),
+	DRM_DEBUG("comm=\"%s\", pid=%d, dev=0x%lx, open_count=%d\n",
+		  current->comm, task_pid_nr(current),
 		  (long)old_encode_dev(file->minor->kdev->devt),
 		  atomic_read(&dev->open_count));
 
@@ -345,7 +345,8 @@ static int drm_open_helper(struct file *filp, struct drm_minor *minor)
 	if (dev->switch_power_state != DRM_SWITCH_POWER_ON && dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF)
 		return -EINVAL;
 
-	DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor->index);
+	DRM_DEBUG("comm=\"%s\", pid=%d, minor=%d\n", current->comm,
+		  task_pid_nr(current), minor->index);
 
 	priv = drm_file_alloc(minor);
 	if (IS_ERR(priv))

drivers/gpu/drm/drm_ioc32.c

@@ -985,8 +985,8 @@ long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	if (!fn)
 		return drm_ioctl(filp, cmd, arg);
 
-	DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
-		  task_pid_nr(current),
+	DRM_DEBUG("comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, %s\n",
+		  current->comm, task_pid_nr(current),
 		  (long)old_encode_dev(file_priv->minor->kdev->devt),
 		  file_priv->authenticated,
 		  drm_compat_ioctls[nr].name);

drivers/gpu/drm/drm_ioctl.c

@@ -852,8 +852,8 @@ long drm_ioctl(struct file *filp,
 		out_size = 0;
 	ksize = max(max(in_size, out_size), drv_size);
 
-	DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
-		  task_pid_nr(current),
+	DRM_DEBUG("comm=\"%s\" pid=%d, dev=0x%lx, auth=%d, %s\n",
+		  current->comm, task_pid_nr(current),
 		  (long)old_encode_dev(file_priv->minor->kdev->devt),
 		  file_priv->authenticated, ioctl->name);
 
@@ -890,15 +890,16 @@ long drm_ioctl(struct file *filp,
 
       err_i1:
 	if (!ioctl)
-		DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
-			  task_pid_nr(current),
+		DRM_DEBUG("invalid ioctl: comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
+			  current->comm, task_pid_nr(current),
 			  (long)old_encode_dev(file_priv->minor->kdev->devt),
 			  file_priv->authenticated, cmd, nr);
 
 	if (kdata != stack_kdata)
 		kfree(kdata);
 	if (retcode)
-		DRM_DEBUG("pid=%d, ret = %d\n", task_pid_nr(current), retcode);
+		DRM_DEBUG("comm=\"%s\", pid=%d, ret=%d\n", current->comm,
+			  task_pid_nr(current), retcode);
 	return retcode;
 }
 EXPORT_SYMBOL(drm_ioctl);