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| author | Alex Ivanov <gnidorah@p0n4ik.tk> | 2013-09-20 17:36:06 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-05 07:17:57 -0700 |
| commit | cb51bb7107aa040f9779be931e3bd6a7b50e0f69 (patch) | |
| tree | 8a0062df5077c4a26a8634e6e080058eb58020a4 /lib/mpi/mpi-internal.h | |
| parent | 986f359ca255d3541e102251bf82ec51d9567f68 (diff) | |
drm/radeon: Make r100_cp_ring_info() and radeon_ring_gfx() safe (v2)
commit 0eb3448aa6b31fbf24c31756aba7940cac5ad6b8 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>
Diffstat (limited to 'lib/mpi/mpi-internal.h')
0 files changed, 0 insertions, 0 deletions