Alex Ivanov f329055796 drm/radeon: Make r100_cp_ring_info() and radeon_ring_gfx() safe (v2) ...

commit 0eb3448aa6 upstream.

Prevent NULL pointer dereference in case when radeon_ring_fini() did it's job.

Reading of r100_cp_ring_info and radeon_ring_gfx debugfs entries will lead to a KP if ring buffer was deallocated, e.g. on failed ring test.
Seen on PA-RISC machine having "radeon: ring test failed (scratch(0x8504)=0xCAFEDEAD)" issue.

v2: agd5f: add some parens around ring->ready check

Signed-off-by: Alex Ivanov <gnidorah@p0n4ik.tk>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-10-05 07:13:12 -07:00

..

drm

drm/radeon: Make r100_cp_ring_info() and radeon_ring_gfx() safe (v2)

2013-10-05 07:13:12 -07:00

host1x

drivers/gpu/host1x/drm: don't check resource with devm_ioremap_resource

2013-05-18 11:55:30 +02:00

vga

fbcon: fix locking harder

2013-02-08 12:02:43 +10:00

Makefile

gpu: host1x: Add host1x driver

2013-04-22 12:32:40 +02:00