Oliver Neukum <oliver@xxxxxxxxxx> writes: > Am Mittwoch, 25. Januar 2012, 20:02:05 schrieb Bjørn Mork: >> We're holding the global wdm_mutex through most of wdm_open, including >> when it calls usb_autopm_get_interface. This call can block waiting for >> a resume, which will need to look up the device list. So we deadlock. >> >> Fix by using a dedicated lock for the device list. > > In that case, as the common case should be a very short list and > you never sleep, why a mutex? A spinlock would do the job. Right you are. Just didn't think too far when testing the quickfix. Will send a new version rightaway. Just need to verify that it actually works (of course it does, but I still like to verify...) Bjørn -- 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
