This is a note to let you know that I've just added the patch titled
drm/nouveau/pci/msi: disable MSI on big-endian platforms by default
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-nouveau-pci-msi-disable-msi-on-big-endian-platforms-by-default.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bc60c90f472b6e762ea96ef384072145adc8d4af Mon Sep 17 00:00:00 2001
From: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
Date: Thu, 10 Aug 2017 12:13:40 -0400
Subject: drm/nouveau/pci/msi: disable MSI on big-endian platforms by default
From: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -180,6 +180,10 @@ 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;
Patches currently in stable-queue which might be from imirkin@xxxxxxxxxxxx are
queue-4.4/drm-nouveau-pci-msi-disable-msi-on-big-endian-platforms-by-default.patch