[patch] rsxx: returning bytes remaining instead of -EFAULT

From: Dan Carpenter
Date: Fri Jun 21 2013 - 02:21:27 EST


copy_to/from_user() returns the number of bytes remaining to be copied.
We should return -EFAULT here instead.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 6e85e21..102dc60 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -199,9 +199,8 @@ static ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf,
if (st)
return st;

- st = copy_to_user(ubuf, buf, cnt);
- if (st)
- return st;
+ if (copy_to_user(ubuf, buf, cnt))
+ return -EFAULT;

info->offset += cnt;

@@ -222,9 +221,8 @@ static ssize_t rsxx_cram_write(struct file *fp, const char __user *ubuf,
if (!buf)
return -ENOMEM;

- st = copy_from_user(buf, ubuf, cnt);
- if (st)
- return st;
+ if (copy_from_user(buf, ubuf, cnt))
+ return -EFAULT;

info->f_pos = (u32)*ppos + info->offset;

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