diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2008-07-04 20:59:28 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-04 21:40:04 +0400 |
| commit | 7ca796f492a11f9408e661c8f22cd8c4f486b8e5 (patch) | |
| tree | 4b4e7fd0017a227c98b72a04c28a66ed5720c3fe /drivers/serial | |
| parent | 69d44a1835ec8163a82c4ee57367f87ae0f85c2e (diff) | |
| download | linux-7ca796f492a11f9408e661c8f22cd8c4f486b8e5.tar.xz | |
serial: fix serial_match_port() for dynamic major tty-device numbers
As reported by Vipul Gandhi, the current serial_match_port() doesn't work
for tty-devices using dynamic major number allocation. Fix it.
It oopses if you suspend a serial port with _dynamic_ major number. ATM,
I think, there's only the drivers/serial/jsm/jsm_driver.c driver, that
does it in-tree.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Tested-by: Vipul Gandhi <vcgandhi1@aol.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/serial_core.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index c9b64e73c987..42d2e108b679 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -1991,7 +1991,9 @@ struct uart_match { static int serial_match_port(struct device *dev, void *data) { struct uart_match *match = data; - dev_t devt = MKDEV(match->driver->major, match->driver->minor) + match->port->line; + struct tty_driver *tty_drv = match->driver->tty_driver; + dev_t devt = MKDEV(tty_drv->major, tty_drv->minor_start) + + match->port->line; return dev->devt == devt; /* Actually, only one tty per port */ } |