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>
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index b94d871..7642495 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -2069,6 +2069,7 @@
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 @@
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 a37a1ef..21acfb5 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -324,10 +324,10 @@
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);
}