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Commit 5330add6 authored by Karol Herbst's avatar Karol Herbst Committed by Greg Kroah-Hartman
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drm/nouveau/pci: do a msi rearm on init 




[ 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.

Signed-off-by: default avatarKarol Herbst <kherbst@redhat.com>
Reviewed-by: default avatarThierry Reding <treding@nvidia.com>
Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 39692705

drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c

+7 −0
Original line number Diff line number Diff line
@@ -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;

}