From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: Sat, 4 Nov 2017 20:20:03 +0000 (+0100)
Subject: i2c: dev: mark RDWR buffers as DMA_SAFE
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=978336d48d887d6deb7793e0d20a4673f357fb8e;p=linux.git

i2c: dev: mark RDWR buffers as DMA_SAFE

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
---

diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index 2cab27a684798..036a03f0d0a68 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -264,6 +264,8 @@ static noinline int i2cdev_ioctl_rdwr(struct i2c_client *client,
 			res = PTR_ERR(msgs[i].buf);
 			break;
 		}
+		/* memdup_user allocates with GFP_KERNEL, so DMA is ok */
+		msgs[i].flags |= I2C_M_DMA_SAFE;
 
 		/*
 		 * If the message length is received from the slave (similar