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USB: serial: introduce a flag into the usb serial layer to tell drivers that their URBs are killed due to suspension

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This patch introduces a flag into the usb serial layer to tell drivers
that their URBs are killed due to suspension. That is necessary to let
drivers know whether they should report an error back.

Signed-off-by: Oliver Neukum <oneukum@suse.de>

Hi Greg,

this is for 2.6.30. Patches to use this in drivers are under development.

	Regards
		Oliver
This commit is contained in:
Oliver Neukum 2009-02-05 16:54:25 +01:00 committed by Greg Kroah-Hartman
parent 6e14bda1b1
commit f8bece8d91
2 changed files with 6 additions and 1 deletions
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4
drivers/usb/serial/usb-serial.c
View File

@ -1067,6 +1067,8 @@ int usb_serial_suspend(struct usb_interface *intf, pm_message_t message)
struct usb_serial_port *port;
int i, r = 0;
serial->suspending = 1;
for (i = 0; i < serial->num_ports; ++i) {
port = serial->port[i];
if (port)
@ -1084,8 +1086,10 @@ int usb_serial_resume(struct usb_interface *intf)
{
struct usb_serial *serial = usb_get_intfdata(intf);
serial->suspending = 0;
if (serial->type->resume)
return serial->type->resume(serial);
return 0;
}
EXPORT_SYMBOL(usb_serial_resume);

3
include/linux/usb/serial.h
View File

@ -130,7 +130,8 @@ struct usb_serial {
struct usb_device *dev;
struct usb_serial_driver *type;
struct usb_interface *interface;
unsigned char disconnected;
unsigned char disconnected:1;
unsigned char suspending:1;
unsigned char minor;
unsigned char num_ports;
unsigned char num_port_pointers;