3.2.63-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Christian König <[email protected]> commit e8c214d22e76dd0ead38f97f8d2dc09aac70d651 upstream. We must mask out the overflow bit as well, otherwise the wptr will never match the rptr again and the interrupt handler will loop forever. Signed-off-by: Christian König <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Reviewed-by: Michel Dänzer <[email protected]> [bwh: Backported to 3.2: drop changes for unsupported GPUs] Signed-off-by: Ben Hutchings <[email protected]> --- --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -2765,6 +2765,7 @@ static u32 evergreen_get_ih_wptr(struct tmp = RREG32(IH_RB_CNTL); tmp |= IH_WPTR_OVERFLOW_CLEAR; WREG32(IH_RB_CNTL, tmp); + wptr &= ~RB_OVERFLOW; } return (wptr & rdev->ih.ptr_mask); } --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -3280,6 +3280,7 @@ static u32 r600_get_ih_wptr(struct radeo tmp = RREG32(IH_RB_CNTL); tmp |= IH_WPTR_OVERFLOW_CLEAR; WREG32(IH_RB_CNTL, tmp); + wptr &= ~RB_OVERFLOW; } return (wptr & rdev->ih.ptr_mask); } -- 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/
