linux-kernel - [PATCH 05/12] i2c: qup: fix the transfer length for BAM rx EOT FLUSH tags

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Date:   Sat,  3 Feb 2018 13:28:10 +0530
From:   Abhishek Sahu <absahu@...eaurora.org>
To:     Andy Gross <andy.gross@...aro.org>,
        Wolfram Sang <wsa@...-dreams.de>
Cc:     David Brown <david.brown@...aro.org>,
        Sricharan R <sricharan@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        Abhishek Sahu <absahu@...eaurora.org>
Subject: [PATCH 05/12] i2c: qup: fix the transfer length for BAM rx EOT FLUSH tags

In case of FLUSH operation, BAM copies INPUT EOT FLUSH (0x94)
instead of normal EOT (0x93) tag in input data stream when an
input EOT tag is received during flush operation. So only one tag
will be written instead of 2 separate tags.

Signed-off-by: Abhishek Sahu <absahu@...eaurora.org>
---
 drivers/i2c/busses/i2c-qup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-qup.c b/drivers/i2c/busses/i2c-qup.c
index 6357aff..094be6a 100644
--- a/drivers/i2c/busses/i2c-qup.c
+++ b/drivers/i2c/busses/i2c-qup.c
@@ -768,10 +768,10 @@ static int qup_i2c_bam_do_xfer(struct qup_i2c_dev *qup, struct i2c_msg *msg,
 		qup->btx.tag.start[0] = QUP_BAM_INPUT_EOT;
 		len++;
 
-		/* scratch buf to read the BAM EOT and FLUSH tags */
+		/* scratch buf to read the BAM EOT FLUSH tags */
 		ret = qup_sg_set_buf(&qup->brx.sg[rx_buf++],
 				     &qup->brx.tag.start[0],
-				     2, qup, DMA_FROM_DEVICE);
+				     1, qup, DMA_FROM_DEVICE);
 		if (ret)
 			return ret;
 	}
-- 
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