[RFC PATCH v4 6/6] i2c: dev: mark RDWR buffers as DMA_SAFE
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: 2017-08-17 14:15:52
Also in:
dri-devel, linux-i2c, linux-iio, linux-media, linux-renesas-soc, lkml
Subsystem:
i2c subsystem, the rest · Maintainers:
Wolfram Sang, Linus Torvalds
Signed-off-by: Wolfram Sang <wsa+renesas@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
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2.11.0