From: Owain Ainsworth <zer...@googlemail.com>

This should be drmCommandWriteRead to avoid an EINVAL error on systems
that strictly check ioctl args. This command has been r/w for ever.
Discussion with airlied agreed that this was the correct course.
---
 src/mesa/drivers/dri/radeon/radeon_cs_legacy.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/radeon/radeon_cs_legacy.c 
b/src/mesa/drivers/dri/radeon/radeon_cs_legacy.c
index cc951a1..c2722a4 100644
--- a/src/mesa/drivers/dri/radeon/radeon_cs_legacy.c
+++ b/src/mesa/drivers/dri/radeon/radeon_cs_legacy.c
@@ -326,7 +326,7 @@ static int cs_emit(struct radeon_cs_int *cs)
         (!IS_R600_CLASS(csm->ctx->radeonScreen))) { /* +r6/r7 : No irq for 
r6/r7 yet. */
        drm_radeon_irq_emit_t emit_cmd;
        emit_cmd.irq_seq = (int*)&csm->pending_age;
-       r = drmCommandWrite(cs->csm->fd, DRM_RADEON_IRQ_EMIT, &emit_cmd, 
sizeof(emit_cmd));
+       r = drmCommandWriteRead(cs->csm->fd, DRM_RADEON_IRQ_EMIT, &emit_cmd, 
sizeof(emit_cmd));
        if (r) {
                return r;
        }
-- 
1.6.5.7

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