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| author | Hsin-Yi Wang <hsinyi@chromium.org> | 2019-02-15 17:02:02 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-24 08:19:08 +0100 |
| commit | 2008d0e3d364ab6237bedf5c401afcde09826e8d (patch) | |
| tree | dc26141327ae222c707a063f5e337c34c8389b6a | |
| parent | 976e944e005f555e90d92e504a38f8231551925b (diff) | |
| download | linux-stable-2008d0e3d364ab6237bedf5c401afcde09826e8d.tar.gz linux-stable-2008d0e3d364ab6237bedf5c401afcde09826e8d.tar.bz2 linux-stable-2008d0e3d364ab6237bedf5c401afcde09826e8d.zip | |
i2c: mediatek: modify threshold passed to i2c_get_dma_safe_msg_buf()
commit bc1a7f75c85e226e82f183d30d75c357f92b6029 upstream.
DMA with zero-length transfers doesn't make sense and this HW doesn't
support them at all, so increase the threshold.
Fixes: fc66b39fe36a ("i2c: mediatek: Use DMA safe buffers for i2c transactions")
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
[wsa: reworded commit message]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/i2c/busses/i2c-mt65xx.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c index a74ef76705e0..2bb4d20ead32 100644 --- a/drivers/i2c/busses/i2c-mt65xx.c +++ b/drivers/i2c/busses/i2c-mt65xx.c @@ -503,7 +503,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs, writel(I2C_DMA_INT_FLAG_NONE, i2c->pdmabase + OFFSET_INT_FLAG); writel(I2C_DMA_CON_RX, i2c->pdmabase + OFFSET_CON); - dma_rd_buf = i2c_get_dma_safe_msg_buf(msgs, 0); + dma_rd_buf = i2c_get_dma_safe_msg_buf(msgs, 1); if (!dma_rd_buf) return -ENOMEM; @@ -526,7 +526,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs, writel(I2C_DMA_INT_FLAG_NONE, i2c->pdmabase + OFFSET_INT_FLAG); writel(I2C_DMA_CON_TX, i2c->pdmabase + OFFSET_CON); - dma_wr_buf = i2c_get_dma_safe_msg_buf(msgs, 0); + dma_wr_buf = i2c_get_dma_safe_msg_buf(msgs, 1); if (!dma_wr_buf) return -ENOMEM; @@ -549,7 +549,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs, writel(I2C_DMA_CLR_FLAG, i2c->pdmabase + OFFSET_INT_FLAG); writel(I2C_DMA_CLR_FLAG, i2c->pdmabase + OFFSET_CON); - dma_wr_buf = i2c_get_dma_safe_msg_buf(msgs, 0); + dma_wr_buf = i2c_get_dma_safe_msg_buf(msgs, 1); if (!dma_wr_buf) return -ENOMEM; @@ -561,7 +561,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs, return -ENOMEM; } - dma_rd_buf = i2c_get_dma_safe_msg_buf((msgs + 1), 0); + dma_rd_buf = i2c_get_dma_safe_msg_buf((msgs + 1), 1); if (!dma_rd_buf) { dma_unmap_single(i2c->dev, wpaddr, msgs->len, DMA_TO_DEVICE); |