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authorChris Lew <clew@codeaurora.org>2018-06-28 04:19:57 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2019-10-11 21:34:12 +0300
commit4623e8bf1de0b86e23a56cdb39a72f054e89c3bd (patch)
tree1a4a76d54ab48ca4486662d793139865fa135743
parentbbe692e349e2a1edf3fe0a29a0e05899c9c94d51 (diff)
downloadlinux-4623e8bf1de0b86e23a56cdb39a72f054e89c3bd.tar.xz
rpmsg: glink: Set tail pointer to 0 at end of FIFO
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 <clew@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
-rw-r--r--drivers/rpmsg/qcom_glink_smem.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/rpmsg/qcom_glink_smem.c b/drivers/rpmsg/qcom_glink_smem.c
index 4238383d8685..579bc4443f6d 100644
--- a/drivers/rpmsg/qcom_glink_smem.c
+++ b/drivers/rpmsg/qcom_glink_smem.c
@@ -105,7 +105,7 @@ 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);