[RFC PATCH v4 6/6] i2c: dev: mark RDWR buffers as DMA_SAFE

[Wolfram Sang]

Signed-off-by: Wolfram Sang <wsa+renesas at sang-engineering.com>
---
 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