Patch "drm/nouveau/pci: do a msi rearm on init" has been added to the 4.14-stable tree

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

drm/nouveau/pci: do a msi rearm on init

to the 4.14-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-pci-do-a-msi-rearm-on-init.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Karol Herbst <[email protected]>
Date: Fri, 24 Nov 2017 03:56:26 +0100
Subject: drm/nouveau/pci: do a msi rearm on init

From: Karol Herbst <[email protected]>

[ Upstream commit a121027d2747168df0aac0c3da35509eea39f61c ]

On my GP107 when I load nouveau after unloading it, for some reason the GPU stopped sending or the CPU stopped receiving interrupts if MSI was enabled.

Doing a rearm once before getting any interrupts fixes this.

---
 drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c |    7 +++++++
 1 file changed, 7 insertions(+)

@@ -136,6 +136,13 @@ nvkm_pci_init(struct nvkm_subdev *subdev
 		return ret;
 
 	pci->irq = pdev->irq;
+
+	/* Ensure MSI interrupts are armed, for the case where there are
+	 * already interrupts pending (for whatever reason) at load time.
+	 */
+	if (pci->msi)
+		pci->func->msi_rearm(pci);
+
 	return ret;
 }
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/drm-nouveau-pci-do-a-msi-rearm-on-init.patch