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Commit e948e1ab authored by Vivek Golani's avatar Vivek Golani Committed by Gerrit - the friendly Code Review server
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rpmsg: qcom_smd: Ensure ordering of channel info updates 



Add wmb() call support after data is written to fifo and
before head index is updated to ensure that data is
written to fifo before head index updation.

Change-Id: Ia2937dc7de28ae31d0d759bf15b869b6f8fb93fe
Signed-off-by: default avatarVivek Golani <vgolani@codeaurora.org>
parent f3a27013

drivers/rpmsg/qcom_smd.c

+3 −0
Original line number Diff line number Diff line
@@ -855,6 +855,9 @@ static int qcom_smd_write_fifo(struct qcom_smd_channel *channel, 
				 word_aligned);

	}



	/* Ensure ordering of channel info updates */

	wmb();



	head += count;

	head &= (channel->fifo_size - 1);

	SET_TX_CHANNEL_INFO(channel, head, head);