usb: cdc-wdm: Fix deadlock between write and resume
The new runtime PM scheme allows resume() to have no locks.
This fixes the deadlock.
Signed-off-by: Oliver Neukum <neukum@b1-systems.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index b574905..189141ca 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -839,10 +839,10 @@
int rv;
dev_dbg(&desc->intf->dev, "wdm%d_resume\n", intf->minor);
- mutex_lock(&desc->lock);
+
clear_bit(WDM_SUSPENDING, &desc->flags);
rv = recover_from_urb_loss(desc);
- mutex_unlock(&desc->lock);
+
return rv;
}
#endif