David Miller [mailto:davem@xxxxxxxxxxxxx] > Sent: Thursday, October 09, 2014 3:45 AM [..] > I think a much simpler fix is to take rtnl_lock() in the workqueue > function and suspend/resume ops. > > Every other place you are adding the mutex already holds the RTNL > mutex. If I use the rtnl_lock(), I get a dead lock when enabling autosuspend. Case 1: autosuspend before calling open. rtnl_lock() call open try to autoresume and rtl8152_resume is called. dead lock occurs. Case 2: autosuspend occurs. rtnl_lock() call close try to autoresume and rtl8152_resume is called. dead lock occurs. Best Regards, Hayes -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
