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From 73267cb0dea18d38a023f20c110e79b742c030c9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@amd.com>
Date: Thu, 5 Jan 2012 18:42:17 +0100
Subject: [PATCH 019/129] radeon: Fix disabling PCI bus mastering on big
endian hosts.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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>
---
drivers/gpu/drm/radeon/r100.c | 5 +++--
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 bfc08f6..31b0d1a 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -2177,6 +2177,7 @@ 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);
@@ -2187,8 +2188,8 @@ 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 b1053d6..c259e21 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);
}
--
1.7.9.5
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