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TTY: serial_core, remove invalid test

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tty->index (named here as line) is set up in initialize_tty_struct.
The value is checked in get_tty_driver for the found driver as:
	if (device < base || device >= base + p->num)
		continue;
	*index = device - base;

So index/line can never be more than driver->num. Hence remove this
test from uart_open.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jiri Slaby 2011-04-20 10:43:16 +02:00 committed by Greg Kroah-Hartman
parent 0ad7c9af3e
commit 32ad3a77b2
1 changed files with 0 additions and 9 deletions
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9
drivers/tty/serial/serial_core.c
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@ -1529,15 +1529,6 @@ static int uart_open(struct tty_struct *tty, struct file *filp)
BUG_ON(!tty_locked());
pr_debug("uart_open(%d) called\n", line);
/*
* tty->driver->num won't change, so we won't fail here with
* tty->driver_data set to something non-NULL (and therefore
* we won't get caught by uart_close()).
*/
retval = -ENODEV;
if (line >= tty->driver->num)
goto fail;
/*
* We take the semaphore inside uart_get to guarantee that we won't
* be re-entered while allocating the state structure, or while we