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usb-serial: fix termios initialization logic 

This patch (as1288) fixes the initialization logic in
serial_install().  A new tty always needs to have a termios
initialized no matter what, not just in the case where the lower
driver will override the termios settings.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2009-09-01 11:39:22 -04:00 committed by Live-CD User
parent cc56cd0157
commit 7e29bb4b77
1 changed files with 10 additions and 12 deletions
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22
drivers/usb/serial/usb-serial.c
View File

@ -210,22 +210,21 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
if (!try_module_get(serial->type->driver.owner))
goto error_module_get;
/* perform the standard setup */
retval = tty_init_termios(tty);
if (retval)
goto error_init_termios;
retval = usb_autopm_get_interface(serial->interface);
if (retval)
goto error_get_interface;
/* If the termios setup has yet to be done */
if (tty->driver->termios[idx] == NULL) {
/* perform the standard setup */
retval = tty_init_termios(tty);
if (retval)
goto error_init_termios;
/* allow the driver to update it */
if (serial->type->init_termios)
serial->type->init_termios(tty);
}
mutex_unlock(&serial->disc_mutex);
/* allow the driver to update the settings */
if (serial->type->init_termios)
serial->type->init_termios(tty);
tty->driver_data = port;
/* Final install (we use the default method) */
@ -234,9 +233,8 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
driver->ttys[idx] = tty;
return retval;
error_init_termios:
usb_autopm_put_interface(serial->interface);
error_get_interface:
error_init_termios:
module_put(serial->type->driver.owner);
error_module_get:
error_no_port: