From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-i2c@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org,
"Niklas Söderlund" <niklas.soderlund@ragnatech.se>,
"Wolfram Sang" <wsa+renesas@sang-engineering.com>
Subject: [PATCH] i2c: rcar: use correct length when unmapping DMA
Date: Sun, 28 May 2017 09:52:17 +0200 [thread overview]
Message-ID: <20170528075217.1214-1-wsa+renesas@sang-engineering.com> (raw)
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>
---
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 214bf2835d1f95..8be3e6cb8fe686 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;
}
--
2.11.0
next reply other threads:[~2017-05-28 7:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-28 7:52 Wolfram Sang [this message]
2017-05-29 9:11 ` [PATCH] i2c: rcar: use correct length when unmapping DMA Geert Uytterhoeven
2017-05-30 4:49 ` Niklas Söderlund
2017-06-15 13:52 ` Wolfram Sang
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