From: Wolfram Sang wsa+renesas@sang-engineering.com
[ Upstream commit 916335036d4fe33f9806240cb0d1900f4975b959 ]
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: 73e8b0528346e8 ("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 Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/i2c/busses/i2c-rcar.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 726615e54f2a..4cf204d07679 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -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; }