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USB: fix autosuspend bug in usb-serial 

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>
CC: stable@kernel.org
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>
This commit is contained in:
Alan Stern 2010-11-29 10:17:22 -05:00 committed by Greg Kroah-Hartman
parent a85b4e7f44
commit abf03184a3
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/serial/usb-serial.c
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@ -51,6 +51,7 @@ static struct usb_driver usb_serial_driver = {
.suspend = usb_serial_suspend, .suspend = usb_serial_suspend,
.resume = usb_serial_resume, .resume = usb_serial_resume,
.no_dynamic_id = 1, .no_dynamic_id = 1,
.supports_autosuspend = 1,
}; };
/* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead
@ -1343,6 +1344,8 @@ int usb_serial_register(struct usb_serial_driver *driver)
return -ENODEV; return -ENODEV;
fixup_generic(driver); fixup_generic(driver);
if (driver->usb_driver)
driver->usb_driver->supports_autosuspend = 1;
if (!driver->description) if (!driver->description)
driver->description = driver->driver.name; driver->description = driver->driver.name;