Properly terminate the DMA transfer in case the DMA PIO transfer
or setup fails for any reason. While at it, enable support for
SMBUS_QUICK. This essentially fixes i2c-detect on this IP.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Fabio Estevam <festevam@xxxxxxxxx>
Cc: Tim Michals <tcmichals@xxxxxxxxx>
Cc: Wolfram Sang <w.sang@xxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-mxs.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c
index 286ca19..6ed53da 100644
--- a/drivers/i2c/busses/i2c-mxs.c
+++ b/drivers/i2c/busses/i2c-mxs.c
@@ -287,12 +287,14 @@ read_init_dma_fail:
select_init_dma_fail:
dma_unmap_sg(i2c->dev, &i2c->sg_io[0], 1, DMA_TO_DEVICE);
select_init_pio_fail:
+ dmaengine_terminate_all(i2c->dmach);
return -EINVAL;
/* Write failpath. */
write_init_dma_fail:
dma_unmap_sg(i2c->dev, i2c->sg_io, 2, DMA_TO_DEVICE);
write_init_pio_fail:
+ dmaengine_terminate_all(i2c->dmach);
return -EINVAL;
}
@@ -357,7 +359,7 @@ static int mxs_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
static u32 mxs_i2c_func(struct i2c_adapter *adap)
{
- return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK);
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
static irqreturn_t mxs_i2c_isr(int this_irq, void *dev_id)
--
1.7.10.4
--
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