From: Chris Lew <clew@xxxxxxxxxxxxxx>
commit 4623e8bf1de0b86e23a56cdb39a72f054e89c3bd upstream.
When wrapping around the FIFO, the remote expects the tail pointer to
be reset to 0 on the edge case where the tail equals the FIFO length.
Fixes: caf989c350e8 ("rpmsg: glink: Introduce glink smem based transport")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Chris Lew <clew@xxxxxxxxxxxxxx>
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/rpmsg/qcom_glink_smem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/rpmsg/qcom_glink_smem.c
+++ b/drivers/rpmsg/qcom_glink_smem.c
@@ -119,7 +119,7 @@ static void glink_smem_rx_advance(struct
tail = le32_to_cpu(*pipe->tail);
tail += count;
- if (tail > pipe->native.length)
+ if (tail >= pipe->native.length)
tail -= pipe->native.length;
*pipe->tail = cpu_to_le32(tail);
