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drivers:tty:fix up ENOIOCTLCMD error handling 

At commit 07d106d0, Linus pointed out that ENOIOCTLCMD should be
translated as ENOTTY to user mode.
For example:
	fd = open("/dev/tty", O_RDWR);
	ioctl(fd, -1, &argp);

then the errno should be ENOTTY but not EINVAL.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wanlong Gao 2012-08-27 15:23:12 +08:00 committed by Greg Kroah-Hartman
parent fd7c81f864
commit bbb63c514a
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/tty_io.c
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@ -2774,7 +2774,7 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
if (ld->ops->ioctl) {
retval = ld->ops->ioctl(tty, file, cmd, arg);
if (retval == -ENOIOCTLCMD)
retval = -EINVAL;
retval = -ENOTTY;
}
tty_ldisc_deref(ld);
return retval;