[Nouveau] [PATCH] pci: do a msi rearm on init

[Karol Herbst]

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 at redhat.com>
---
 drm/nouveau/nvkm/subdev/pci/base.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drm/nouveau/nvkm/subdev/pci/base.c b/drm/nouveau/nvkm/subdev/pci/base.c
index b1b1f362..7ee1fbb4 100644
--- a/drm/nouveau/nvkm/subdev/pci/base.c
+++ b/drm/nouveau/nvkm/subdev/pci/base.c
@@ -136,6 +136,10 @@ nvkm_pci_init(struct nvkm_subdev *subdev)
 		return ret;
 
 	pci->irq = pdev->irq;
+	/* workaround: do a rearm once */
+	if (pci->msi)
+		pci->func->msi_rearm(pci);
+
 	return ret;
 }
 
-- 
2.14.3