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pci/msi: disable MSI on big-endian platforms by default
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 <>
Signed-off-by: Ben Skeggs <>
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imirkin authored and skeggsb committed Aug 13, 2017
1 parent 4cc5b39 commit d1fb989
Showing 1 changed file with 4 additions and 0 deletions.
@@ -192,6 +192,10 @@ nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,

#ifdef __BIG_ENDIAN
pci->msi = false;

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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