[PATCH linux dev-4.10 v4 09/31] drivers: fsi: sbefifo: Remove warning and user data access check

[Eddie James]

From: "Edward A. James" <eajames at us.ibm.com>

We check for user buffer access when we copy the data. No reason to
throw a kernel warning if there is an offset provided; just ignore it.

Signed-off-by: Edward A. James <eajames at us.ibm.com>
Reviewed-by: Andrew Jeffery <andrew at aj.id.au>
---
 drivers/fsi/fsi-sbefifo.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/fsi/fsi-sbefifo.c b/drivers/fsi/fsi-sbefifo.c
index 5efba30..60b133d 100644
--- a/drivers/fsi/fsi-sbefifo.c
+++ b/drivers/fsi/fsi-sbefifo.c
@@ -621,11 +621,6 @@ static ssize_t sbefifo_read(struct file *file, char __user *buf, size_t len,
 {
 	struct sbefifo_client *client = file->private_data;
 
-	WARN_ON(*offset);
-
-	if (!access_ok(VERIFY_WRITE, buf, len))
-		return -EFAULT;
-
 	return sbefifo_read_common(client, buf, NULL, len);
 }
 
@@ -748,11 +743,6 @@ static ssize_t sbefifo_write(struct file *file, const char __user *buf,
 {
 	struct sbefifo_client *client = file->private_data;
 
-	WARN_ON(*offset);
-
-	if (!access_ok(VERIFY_READ, buf, len))
-		return -EFAULT;
-
 	return sbefifo_write_common(client, buf, NULL, len);
 }
 
-- 
1.8.3.1