diff options
| author | Johan Hovold <[email protected]> | 2016-05-08 20:08:03 +0200 |
|---|---|---|
| committer | Johan Hovold <[email protected]> | 2016-05-10 09:40:16 +0200 |
| commit | 194e958c5c3bf4fa0805b0653fe2d0428d3791ff (patch) | |
| tree | 5cef6d57eb949248eeefadd3f7672e1e96c09c44 | |
| parent | 028c49f5e02a257c94129cd815f7c8485f51d4ef (diff) | |
USB: serial: fix minor-number allocation
Due to a missing upper bound, invalid minor numbers could be assigned to
ports. Such devices would later fail to register, but let's catch this
early as intended and avoid having devices with only a subset of their
ports registered (potentially the empty set).
Signed-off-by: Johan Hovold <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 7ecf4ff86b9a..4d2b310de55d 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -96,7 +96,8 @@ static int allocate_minors(struct usb_serial *serial, int num_ports) mutex_lock(&table_lock); for (i = 0; i < num_ports; ++i) { port = serial->port[i]; - minor = idr_alloc(&serial_minors, port, 0, 0, GFP_KERNEL); + minor = idr_alloc(&serial_minors, port, 0, + USB_SERIAL_TTY_MINORS, GFP_KERNEL); if (minor < 0) goto error; port->minor = minor; |