3.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Greg Kroah-Hartman <[email protected]> This reverts commit 57ecc93ce680b1ace1f9e79d588dabe32353202c which really is commit 0d8957c8a90bbb5d34fab9a304459448a5131e06 upstream as it has been reported to cause problems in the 3.4.y kernel series. Reported-by: Herton Ronaldo Krzesinski <[email protected]> Cc: Andreas Sturmlechner <[email protected]> Cc: Jani Nikula <[email protected]> Cc: Yang Guang <[email protected]> Cc: Daniel Vetter <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/gpu/drm/i915/intel_ringbuffer.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -258,6 +258,8 @@ static int init_ring_common(struct intel I915_WRITE_HEAD(ring, 0); ring->write_tail(ring, 0); + /* Initialize the ring. */ + I915_WRITE_START(ring, obj->gtt_offset); head = I915_READ_HEAD(ring) & HEAD_ADDR; /* G45 ring initialization fails to reset head to zero */ @@ -283,11 +285,6 @@ static int init_ring_common(struct intel } } - /* Initialize the ring. This must happen _after_ we've cleared the ring - * registers with the above sequence (the readback of the HEAD registers - * also enforces ordering), otherwise the hw might lose the new ring - * register values. */ - I915_WRITE_START(ring, obj->gtt_offset); I915_WRITE_CTL(ring, ((ring->size - PAGE_SIZE) & RING_NR_PAGES) | RING_VALID); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
