evie/android_kernel_oneplus_msm8998
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drm/nouveau/pci/msi: disable MSI on big-endian platforms by default

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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>
This commit is contained in:
Ilia Mirkin 2017-08-10 12:13:40 -04:00 • committed by Greg Kroah-Hartman
parent 4a9c294d7b
commit 966e3a2d98
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
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@ -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;