[PATCH 2/4] misc: xilinx_sdfec: Return -EFAULT if copy_from_user() fails

[Dan Carpenter]

The copy_from_user() funciton returns the number of bytes remaining to
be copied but we want to return -EFAULT to the user.

Fixes: 20ec628e8007 ("misc: xilinx_sdfec: Add ability to configure LDPC")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 drivers/misc/xilinx_sdfec.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
index dc1b8b412712..813b82c59360 100644
--- a/drivers/misc/xilinx_sdfec.c
+++ b/drivers/misc/xilinx_sdfec.c
@@ -651,9 +651,10 @@ static int xsdfec_add_ldpc(struct xsdfec_dev *xsdfec, void __user *arg)
 	if (!ldpc)
 		return -ENOMEM;
 
-	ret = copy_from_user(ldpc, arg, sizeof(*ldpc));
-	if (ret)
+	if (copy_from_user(ldpc, arg, sizeof(*ldpc))) {
+		ret = -EFAULT;
 		goto err_out;
+	}
 
 	if (xsdfec->config.code == XSDFEC_TURBO_CODE) {
 		ret = -EIO;
-- 
2.20.1