github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-10 23:53:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/radeon: do a posting read in r100_set_irq

Browse Source 
commit f957063fee upstream.

To make sure the writes go through the pci bridge.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=90741

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher 2015-03-02 20:36:26 -05:00 committed by Greg Kroah-Hartman
parent c1f447877a
commit a02db0f24c
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/radeon/r100.c
View File

@ -743,6 +743,10 @@ int r100_irq_set(struct radeon_device *rdev)
tmp |= RADEON_FP2_DETECT_MASK;
}
WREG32(RADEON_GEN_INT_CNTL, tmp);
/* read back to post the write */
RREG32(RADEON_GEN_INT_CNTL);
return 0;
}