RE: [PATCH net] r8152: use cancel_delayed_work for runtime suspend
From: Hayes Wang <hidden>
Date: 2014-10-20 02:19:54
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Oliver Neukum [mailto:oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org]
Sent: Sunday, October 19, 2014 3:48 AM
[...]
The diagnosis is good, the fix is not good. It opens a race during which the queued work can touch a suspended device.
The delayed work would wake up the device by calling usb_autopm_get_interface() before accessing the device. Besides, there is a mutex to avoid the race. Best Regards, Hayes -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html