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authorIlia Mirkin <imirkin@alum.mit.edu>2017-08-10 12:13:40 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-09-13 14:09:45 -0700
commit966e3a2d98c18afb58e7c396d8b066cd893b2c10 (patch)
treeef7ce5296af4439f267db95df897740ad961a3e5
parent4a9c294d7b1e7cf965e4b2e2e9955b9b548a1a0b (diff)
downloadlinux-linaro-stable-966e3a2d98c18afb58e7c396d8b066cd893b2c10.tar.gz
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>
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c4
1 files changed, 4 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 d671dcfaff3c..4896474da320 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
@@ -180,6 +180,10 @@ nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
}
}
+#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;