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| author | Michel Dänzer <michel.daenzer@amd.com> | 2012-01-05 18:42:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-25 17:24:35 -0800 |
| commit | be2ef85142e6f00c7f6c8842d903701bdf88cb5c (patch) | |
| tree | 0ec6924a5f1afc07c0b171540dd5949782043b74 | |
| parent | a674b8b3e345496a96aec389446650455b2fdfa1 (diff) | |
| download | linux-stable-be2ef85142e6f00c7f6c8842d903701bdf88cb5c.tar.gz linux-stable-be2ef85142e6f00c7f6c8842d903701bdf88cb5c.tar.bz2 linux-stable-be2ef85142e6f00c7f6c8842d903701bdf88cb5c.zip | |
radeon: Fix disabling PCI bus mastering on big endian hosts.
commit 3df96909b75835d487a9178761622b0cbd7310d4 upstream.
It would previously write basically random bits to PCI configuration space...
Not very surprising that the GPU tended to stop responding completely. The
resulting MCE even froze the whole machine sometimes.
Now resetting the GPU after a lockup has at least a fighting chance of
succeeding.
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/gpu/drm/radeon/r100.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/rs600.c | 4 |
2 files changed, 5 insertions, 4 deletions
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c index b94d871487e0..764249587f14 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -2069,6 +2069,7 @@ bool r100_gpu_is_lockup(struct radeon_device *rdev) void r100_bm_disable(struct radeon_device *rdev) { u32 tmp; + u16 tmp16; /* disable bus mastering */ tmp = RREG32(R_000030_BUS_CNTL); @@ -2079,8 +2080,8 @@ void r100_bm_disable(struct radeon_device *rdev) WREG32(R_000030_BUS_CNTL, (tmp & 0xFFFFFFFF) | 0x00000040); tmp = RREG32(RADEON_BUS_CNTL); mdelay(1); - pci_read_config_word(rdev->pdev, 0x4, (u16*)&tmp); - pci_write_config_word(rdev->pdev, 0x4, tmp & 0xFFFB); + pci_read_config_word(rdev->pdev, 0x4, &tmp16); + pci_write_config_word(rdev->pdev, 0x4, tmp16 & 0xFFFB); mdelay(1); } diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c index a37a1efdd22a..21acfb5449a7 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -324,10 +324,10 @@ void rs600_hpd_fini(struct radeon_device *rdev) void rs600_bm_disable(struct radeon_device *rdev) { - u32 tmp; + u16 tmp; /* disable bus mastering */ - pci_read_config_word(rdev->pdev, 0x4, (u16*)&tmp); + pci_read_config_word(rdev->pdev, 0x4, &tmp); pci_write_config_word(rdev->pdev, 0x4, tmp & 0xFFFB); mdelay(1); } |