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

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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: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Karol Herbst 2017-11-24 03:56:26 +01:00 committed by Ben Skeggs
parent 81a24b9ae8
commit a121027d27
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
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@ -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;
}