From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxxx>
CC: stable@xxxxxxxxxx
Reported-by: Kevin Smith <thirdwiggin@xxxxxxxxx>
Reported-and-tested-by: Simon Gerber <gesimu@xxxxxxxxx>
Reported-and-tested-by: Matteo Croce <matteo@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/serial/usb-serial.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 861223f..6954de5 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -51,6 +51,7 @@ static struct usb_driver usb_serial_driver = {
.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
@@ -1343,6 +1344,8 @@ int usb_serial_register(struct usb_serial_driver *driver)
return -ENODEV;
fixup_generic(driver);
+ if (driver->usb_driver)
+ driver->usb_driver->supports_autosuspend = 1;
if (!driver->description)
driver->description = driver->driver.name;
--
1.7.1
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