[PATCH v6 3/9] i2c: dev: mark RDWR buffers as DMA_SAFE

Wolfram Sang
2017-11-04T20:20:03Z

Reviewed-by: Jonathan Cameron <Jonathan.Cameron-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Signed-off-by: Wolfram Sang <wsa+renesas-jBu1N2QxHDJrcw3mvpCnnVaTQe2KTcn/@public.gmane.org>
---
drivers/i2c/i2c-dev.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index 6f638bbc922db4..bbc7aadb4c899d 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -280,6 +280,8 @@ static noinline int i2cdev_ioctl_rdwr(struct i2c_client *client,
res = PTR_ERR(rdwr_pa[i].buf);
break;
}
+ /* memdup_user allocates with GFP_KERNEL, so DMA is ok */
+ rdwr_pa[i].flags |= I2C_M_DMA_SAFE;

/*
* If the message length is received from the slave (similar
--
2.11.0