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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2008-07-04 20:59:28 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-04 21:40:04 +0400
commit7ca796f492a11f9408e661c8f22cd8c4f486b8e5 (patch)
tree4b4e7fd0017a227c98b72a04c28a66ed5720c3fe
parent69d44a1835ec8163a82c4ee57367f87ae0f85c2e (diff)
downloadlinux-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>
-rw-r--r--drivers/serial/serial_core.c4
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 */
}