File 0143-drm-nouveau-pci-msi-disable-MSI-on-big-end... of Package drm.7971

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File 0143-drm-nouveau-pci-msi-disable-MSI-on-big-endian-platfo.patch of Package drm.7971

From 25bdc516b58e84b96d3755b55c73674778055a41 Mon Sep 17 00:00:00 2001
From: Ilia Mirkin <imirkin@alum.mit.edu>
Date: Thu, 10 Aug 2017 12:13:40 -0400
Subject: [PATCH] drm/nouveau/pci/msi: disable MSI on big-endian platforms by
 default

commit bc60c90f472b6e762ea96ef384072145adc8d4af upstream.

It appears that MSI does not work on either G5 PPC nor on a E5500-based
platform, where other hardware is reported to work fine with MSI.

Both tests were conducted with NV4x hardware, so perhaps other (or even
this) hardware can be made to work. It's still possible to force-enable
with config=NvMSI=1 on load.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
@@ -192,6 +192,10 @@ nvkm_pci_new_(const struct nvkm_pci_func
 		}
 	}
 
+#ifdef __BIG_ENDIAN
+	pci->msi = false;
+#endif
+
 	pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi);
 	if (pci->msi && func->msi_rearm) {
 		pci->msi = pci_enable_msi(pci->pdev) == 0;

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File 0143-drm-nouveau-pci-msi-disable-MSI-on-big-endian-platfo.patch of Package drm.7971

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