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rpmsg: glink: smem: Support rx peak for size less than 4 bytes

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commit 928002a5e9dab2ddc1a0fe3e00739e89be30dc6b upstream.

The current rx peak function fails to read the data if size is
less than 4bytes.

Use memcpy_fromio to support data reads of size less than 4 bytes.

Cc: stable@vger.kernel.org
Fixes: f0beb4ba9b18 ("rpmsg: glink: Remove chunk size word align warning")
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: nobuhiro1.iwamatsu@toshiba.co.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arun Kumar Neelakantam 2018-10-03 17:08:20 +05:30 committed by Greg Kroah-Hartman
parent 7d89ff98be
commit df9c43b0a8
1 changed files with 4 additions and 8 deletions
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12
drivers/rpmsg/qcom_glink_smem.c
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@ -99,15 +99,11 @@ static void glink_smem_rx_peak(struct qcom_glink_pipe *np,
tail -= pipe->native.length;
len = min_t(size_t, count, pipe->native.length - tail);
if (len) {
__ioread32_copy(data, pipe->fifo + tail,
len / sizeof(u32));
}
if (len)
memcpy_fromio(data, pipe->fifo + tail, len);
if (len != count) {
__ioread32_copy(data + len, pipe->fifo,
(count - len) / sizeof(u32));
}
if (len != count)
memcpy_fromio(data + len, pipe->fifo, (count - len));
}
static void glink_smem_rx_advance(struct qcom_glink_pipe *np,