Patch "drm/nouveau: Rename acpi_work to hpd_work" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    drm/nouveau: Rename acpi_work to hpd_work

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-nouveau-rename-acpi_work-to-hpd_work.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Jun 15 14:56:50 CEST 2017
From: Hans de Goede <hdegoede@redhat.com>
Date: Mon, 21 Nov 2016 17:50:54 +0100
Subject: drm/nouveau: Rename acpi_work to hpd_work

From: Hans de Goede <hdegoede@redhat.com>


[ Upstream commit 81280d0e24e76c35f40f997af26c779bcb10b04d ]

We need to call drm_helper_hpd_irq_event() on resume to properly detect
monitor connection / disconnection on some laptops. For runtime-resume
(which gets called on resume from normal suspend too) we must call
drm_helper_hpd_irq_event() from a workqueue to avoid a deadlock.

Rename acpi_work to hpd_work, and move it out of the #ifdef CONFIG_ACPI
blocks to make it suitable for generic work.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/nouveau/nouveau_display.c |   32 +++++++++++++++---------------
 drivers/gpu/drm/nouveau/nouveau_drv.h     |    2 -
 2 files changed, 17 insertions(+), 17 deletions(-)

--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -359,21 +359,10 @@ static struct nouveau_drm_prop_enum_list
 	}                                                                      \
 } while(0)
 
-#ifdef CONFIG_ACPI
-
-/*
- * Hans de Goede: This define belongs in acpi/video.h, I've submitted a patch
- * to the acpi subsys to move it there from drivers/acpi/acpi_video.c .
- * This should be dropped once that is merged.
- */
-#ifndef ACPI_VIDEO_NOTIFY_PROBE
-#define ACPI_VIDEO_NOTIFY_PROBE			0x81
-#endif
-
 static void
-nouveau_display_acpi_work(struct work_struct *work)
+nouveau_display_hpd_work(struct work_struct *work)
 {
-	struct nouveau_drm *drm = container_of(work, typeof(*drm), acpi_work);
+	struct nouveau_drm *drm = container_of(work, typeof(*drm), hpd_work);
 
 	pm_runtime_get_sync(drm->dev->dev);
 
@@ -383,6 +372,17 @@ nouveau_display_acpi_work(struct work_st
 	pm_runtime_put_sync(drm->dev->dev);
 }
 
+#ifdef CONFIG_ACPI
+
+/*
+ * Hans de Goede: This define belongs in acpi/video.h, I've submitted a patch
+ * to the acpi subsys to move it there from drivers/acpi/acpi_video.c .
+ * This should be dropped once that is merged.
+ */
+#ifndef ACPI_VIDEO_NOTIFY_PROBE
+#define ACPI_VIDEO_NOTIFY_PROBE			0x81
+#endif
+
 static int
 nouveau_display_acpi_ntfy(struct notifier_block *nb, unsigned long val,
 			  void *data)
@@ -395,9 +395,9 @@ nouveau_display_acpi_ntfy(struct notifie
 			/*
 			 * This may be the only indication we receive of a
 			 * connector hotplug on a runtime suspended GPU,
-			 * schedule acpi_work to check.
+			 * schedule hpd_work to check.
 			 */
-			schedule_work(&drm->acpi_work);
+			schedule_work(&drm->hpd_work);
 
 			/* acpi-video should not generate keypresses for this */
 			return NOTIFY_BAD;
@@ -587,8 +587,8 @@ nouveau_display_create(struct drm_device
 	}
 
 	nouveau_backlight_init(dev);
+	INIT_WORK(&drm->hpd_work, nouveau_display_hpd_work);
 #ifdef CONFIG_ACPI
-	INIT_WORK(&drm->acpi_work, nouveau_display_acpi_work);
 	drm->acpi_nb.notifier_call = nouveau_display_acpi_ntfy;
 	register_acpi_notifier(&drm->acpi_nb);
 #endif
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -163,9 +163,9 @@ struct nouveau_drm {
 	struct nvbios vbios;
 	struct nouveau_display *display;
 	struct backlight_device *backlight;
+	struct work_struct hpd_work;
 #ifdef CONFIG_ACPI
 	struct notifier_block acpi_nb;
-	struct work_struct acpi_work;
 #endif
 
 	/* power management */


Patches currently in stable-queue which might be from hdegoede@redhat.com are

queue-4.9/drm-nouveau-intercept-acpi_video_notify_probe.patch
queue-4.9/drm-nouveau-handle-fbcon-suspend-resume-in-seperate-worker.patch
queue-4.9/drm-nouveau-rename-acpi_work-to-hpd_work.patch