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USB: serial: export usb_serial_generic_write_start

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Export usb_serial_generic_write_start which is needed when implementing
a custom resume function while still relying on the generic write
implementation.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-10-09 17:01:12 +02:00 committed by Greg Kroah-Hartman
parent 818f60365a
commit 706cd17e85
2 changed files with 4 additions and 1 deletions
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3
drivers/usb/serial/generic.c
View File

@ -129,7 +129,7 @@ int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port,
*
* Return: Zero on success or if busy, otherwise a negative errno value.
*/
static int usb_serial_generic_write_start(struct usb_serial_port *port,
int usb_serial_generic_write_start(struct usb_serial_port *port,
gfp_t mem_flags)
{
struct urb *urb;
@ -184,6 +184,7 @@ retry:
return 0;
}
EXPORT_SYMBOL_GPL(usb_serial_generic_write_start);
/**
* usb_serial_generic_write - generic write function

2
include/linux/usb/serial.h
View File

@ -320,6 +320,8 @@ extern struct usb_serial_port *usb_serial_port_get_by_minor(unsigned int minor);
extern void usb_serial_put(struct usb_serial *serial);
extern int usb_serial_generic_open(struct tty_struct *tty,
struct usb_serial_port *port);
extern int usb_serial_generic_write_start(struct usb_serial_port *port,
gfp_t mem_flags);
extern int usb_serial_generic_write(struct tty_struct *tty,
struct usb_serial_port *port, const unsigned char *buf, int count);
extern void usb_serial_generic_close(struct usb_serial_port *port);