From cb622fd2aba07c1f8cdb0d67ec80c1cf3759f2d0 Mon Sep 17 00:00:00 2001 From: Chris Lew Date: Wed, 27 Jun 2018 18:19:57 -0700 Subject: rpmsg: glink: Set tail pointer to 0 at end of FIFO 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@vger.kernel.org Signed-off-by: Chris Lew Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman --- drivers/rpmsg/qcom_glink_smem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/rpmsg') diff --git a/drivers/rpmsg/qcom_glink_smem.c b/drivers/rpmsg/qcom_glink_smem.c index 5cdaa5f8fb61..53b3a43160f4 100644 --- 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 qcom_glink_pipe *np, 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); -- cgit v1.2.3