Fixes intermittent corruption of cmdstream dump.
Signed-off-by: Rob Clark robdclark@gmail.com --- drivers/gpu/drm/msm/msm_rd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_rd.c b/drivers/gpu/drm/msm/msm_rd.c index 5c087a4228ff..918c65e19964 100644 --- a/drivers/gpu/drm/msm/msm_rd.c +++ b/drivers/gpu/drm/msm/msm_rd.c @@ -120,7 +120,7 @@ static void rd_write(struct msm_rd_state *rd, const void *buf, int sz) n = min(sz, circ_space_to_end(&rd->fifo)); memcpy(fptr, ptr, n);
- fifo->head = (fifo->head + n) & (BUF_SZ - 1); + smp_store_release(&fifo->head, (fifo->head + n) & (BUF_SZ - 1)); sz -= n; ptr += n;
@@ -157,7 +157,7 @@ static ssize_t rd_read(struct file *file, char __user *buf, goto out; }
- fifo->tail = (fifo->tail + n) & (BUF_SZ - 1); + smp_store_release(&fifo->tail, (fifo->tail + n) & (BUF_SZ - 1)); *ppos += n;
wake_up_all(&rd->fifo_event);