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i2c: rcar: use correct length when unmapping DMA 

Because we need to transfer some bytes with PIO, the msg length is not
the length of the DMA buffer. Use the correct value which we used when
doing the mapping.

Fixes: 73e8b05283 ("i2c: rcar: add DMA support")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2017-05-28 09:52:17 +02:00 committed by Wolfram Sang
parent 32c1431eea
commit 916335036d
1 changed files with 1 additions and 1 deletions
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2
drivers/i2c/busses/i2c-rcar.c
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@ -319,7 +319,7 @@ static void rcar_i2c_dma_unmap(struct rcar_i2c_priv *priv)
rcar_i2c_write(priv, ICFBSCR, TCYC06);
dma_unmap_single(chan->device->dev, sg_dma_address(&priv->sg),
priv->msg->len, priv->dma_direction);
sg_dma_len(&priv->sg), priv->dma_direction);
priv->dma_direction = DMA_NONE;
}