[217/289] USB: fix autosuspend bug in usb-serial

Greg KH
2010-12-08T01:19:29Z

From: Alan Stern <stern@rowland.harvard.edu>

commit abf03184a31a3286fc0ab30f838ddee8ba9f9b7b upstream.

This patch (as1437) fixes a bug in the usb-serial autosuspend
handling. Since the usb-serial core now has autosuspend support, it
must set the .supports_autosuspend member in every serial driver it
registers. Otherwise the usb_autopm_get_interface() call won't work.

This fixes Bugzilla #23012.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Kevin Smith <thirdwiggin@gmail.com>
Reported-and-tested-by: Simon Gerber <gesimu@gmail.com>
Reported-and-tested-by: Matteo Croce <matteo@openwrt.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/usb/serial/usb-serial.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -52,6 +52,7 @@ static struct usb_driver usb_serial_driv
.suspend = usb_serial_suspend,
.resume = usb_serial_resume,
.no_dynamic_id = 1,
+ .supports_autosuspend = 1,
};

/* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead
@@ -1331,6 +1332,8 @@ int usb_serial_register(struct usb_seria
return -ENODEV;

fixup_generic(driver);
+ if (driver->usb_driver)
+ driver->usb_driver->supports_autosuspend = 1;

if (!driver->description)
driver->description = driver->driver.name;