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acm: Return ENODEV instead of EINVAL when trying to open ACM device. 

This is required, otherwise a user will get a EINVAL while opening a
non-existing device, instead of ENODEV.

This is what I get with this patch applied now instead of an "Invalid
argument".

  cascardo@vespa:~$ cat /dev/ttyACM0
  cat: /dev/ttyACM0: No such device
  cascardo@vespa:~$

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Thadeu Lima de Souza Cascardo 2009-06-25 14:41:24 +01:00 committed by Linus Torvalds
parent a37f6b84c4
commit 42dd2aa649
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/class/cdc-acm.c
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@ -550,7 +550,7 @@ static void acm_waker(struct work_struct *waker)
static int acm_tty_open(struct tty_struct *tty, struct file *filp)
{
struct acm *acm;
int rv = -EINVAL;
int rv = -ENODEV;
int i;
dbg("Entering acm_tty_open.");