diff options
| author | Chris Lew <clew@codeaurora.org> | 2018-06-27 18:19:57 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-21 10:47:44 +0100 |
| commit | cb622fd2aba07c1f8cdb0d67ec80c1cf3759f2d0 (patch) | |
| tree | 0794007d02f7c65bf255c7f7ea6bb043b291f740 /drivers/rpmsg | |
| parent | 9d9ee2b7b643c5fa208cc4094cbbe27bee93d5bb (diff) | |
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 <clew@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/rpmsg')
| -rw-r--r-- | drivers/rpmsg/qcom_glink_smem.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); |