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authorKarol Herbst <kherbst@redhat.com>2017-11-24 03:56:26 +0100
committerBen Skeggs <bskeggs@redhat.com>2017-12-19 10:16:37 +1000
commita121027d2747168df0aac0c3da35509eea39f61c (patch)
treea97382251dadb6143f45589f804f9ced39d7cfca /drivers/gpu/drm/nouveau
parent81a24b9ae8eea95b74337c253059da761043ed06 (diff)
drm/nouveau/pci: do a msi rearm on init
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>
Diffstat (limited to 'drivers/gpu/drm/nouveau')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
index b1b1f3626b96..deb96de54b00 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
@@ -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;
}