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USB: serial: export generic throttle and unthrottle 

Allow drivers to use the generic throttle and unthrottle implementation.
This makes sense for drivers using the generic read functionality.

Note that drivers need to set these explicitly in order to enable them
(i.e., we do not set them at port probe if not defined).

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johan Hovold 2010-03-17 23:05:59 +01:00 committed by Greg Kroah-Hartman
parent f08e07ac8b
commit f1e949ac4e
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/serial/generic.c
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@ -517,6 +517,7 @@ void usb_serial_generic_throttle(struct tty_struct *tty)
port->throttle_req = 1;
spin_unlock_irqrestore(&port->lock, flags);
}
EXPORT_SYMBOL_GPL(usb_serial_generic_throttle);
void usb_serial_generic_unthrottle(struct tty_struct *tty)
{
@ -534,6 +535,7 @@ void usb_serial_generic_unthrottle(struct tty_struct *tty)
if (was_throttled)
usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
}
EXPORT_SYMBOL_GPL(usb_serial_generic_unthrottle);
#ifdef CONFIG_MAGIC_SYSRQ
int usb_serial_handle_sysrq_char(struct tty_struct *tty,