rpmsg: glink: Set tail pointer to 0 at end of FIFO
commit4623e8bf1d
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:caf989c350
("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>
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@ -105,7 +105,7 @@ static void glink_smem_rx_advance(struct qcom_glink_pipe *np,
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tail = le32_to_cpu(*pipe->tail);
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tail += count;
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if (tail > pipe->native.length)
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if (tail >= pipe->native.length)
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tail -= pipe->native.length;
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*pipe->tail = cpu_to_le32(tail);
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