drm/radeon: enable pci bus mastering after card is initialised (v2)
This closes a race seen with kexec where we enable PCI bus mastering
but the card has been reinitialised fully yet.
This was previously fixed by a patch from Jerome, but this should
close the race completely.
v2: add SI support as suggested by Alex.
Reported-and-tested-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 81801c1..e11df77 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -1180,6 +1180,10 @@
WREG32(RADEON_CP_RB_WPTR_DELAY, 0);
WREG32(RADEON_CP_CSQ_MODE, 0x00004D4D);
WREG32(RADEON_CP_CSQ_CNTL, RADEON_CSQ_PRIBM_INDBM);
+
+ /* at this point everything should be setup correctly to enable master */
+ pci_set_master(rdev->pdev);
+
radeon_ring_start(rdev, RADEON_RING_TYPE_GFX_INDEX, &rdev->ring[RADEON_RING_TYPE_GFX_INDEX]);
r = radeon_ring_test(rdev, RADEON_RING_TYPE_GFX_INDEX, ring);
if (r) {