On 03/06/2014 10:11 AM, Dan Carpenter wrote:
On Thu, Mar 06, 2014 at 09:56:29AM -0500, Mark Hounschell wrote:
On 03/05/2014 04:47 PM, Dan Carpenter wrote:
On Wed, Mar 05, 2014 at 03:54:50PM -0500, Mark Hounschell wrote:
@@ -2953,7 +2955,8 @@ static int dgap_tty_write(struct tty_struct *tty, const
unsigned char *buf, int
if (down_interruptible(&dgap_TmpWriteSem))
return -EINTR;
- if (copy_from_user(dgap_TmpWriteBuf, (const uchar __user *)
buf, count)) {
+ if (copy_from_user(dgap_TmpWriteBuf, (const uchar __user *)buf,
+ count)) {
up(&dgap_TmpWriteSem);
return -EFAULT;
}
This is dead code btw. "from_user" is always false.
Are you saying that copy_from_user can never return anything but 0?
No. This code looks buggy so I looked at the context. There is
"from_user" variable which is always zero. The buggy code is dead code.
Oh, I see. Might as well get removed then. I'll follow with one more in
this series.
I found a little more dead code as well and will include that also.
mark
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