diff options
Diffstat (limited to 'drivers/rpmsg/qcom_glink_rpm.c')
| -rw-r--r-- | drivers/rpmsg/qcom_glink_rpm.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/rpmsg/qcom_glink_rpm.c b/drivers/rpmsg/qcom_glink_rpm.c index 33daa3223ce0..cc73af0aae8a 100644 --- a/drivers/rpmsg/qcom_glink_rpm.c +++ b/drivers/rpmsg/qcom_glink_rpm.c @@ -156,11 +156,31 @@ static void glink_rpm_tx_write(struct qcom_glink_pipe *glink_pipe, const void *data, size_t dlen) { struct glink_rpm_pipe *pipe = to_rpm_pipe(glink_pipe); + size_t tlen = hlen + dlen; + size_t aligned_dlen; unsigned int head; + char padding[8] = {0}; + size_t pad; + + /* Header length comes from glink native and is always 4 byte aligned */ + if (WARN(hlen % 4, "Glink Header length must be 4 bytes aligned\n")) + return; + + /* + * Move the unaligned tail of the message to the padding chunk, to + * ensure word aligned accesses + */ + aligned_dlen = ALIGN_DOWN(dlen, 4); + if (aligned_dlen != dlen) + memcpy(padding, data + aligned_dlen, dlen - aligned_dlen); head = readl(pipe->head); head = glink_rpm_tx_write_one(pipe, head, hdr, hlen); - head = glink_rpm_tx_write_one(pipe, head, data, dlen); + head = glink_rpm_tx_write_one(pipe, head, data, aligned_dlen); + + pad = ALIGN(tlen, 8) - ALIGN_DOWN(tlen, 4); + if (pad) + head = glink_rpm_tx_write_one(pipe, head, padding, pad); writel(head, pipe->head); } |