Re: [PATCH] usb: gadget: f_fs: Fix possibe deadlock

Hi Michal, On 8 December 2016 at 23:18, Michal Nazarewicz wrote: > On Thu, Dec 08 2016, Baolin Wang wrote: >> When system try to close /dev/usb-ffs/adb/ep0 on one core, at the same >> time another core try to attach new UDC, which will cause deadlock as >> below scenario. Thus

Re: [PATCH] usb: gadget: f_fs: Fix possibe deadlock

On Thu, Dec 08 2016, Baolin Wang wrote: > When system try to close /dev/usb-ffs/adb/ep0 on one core, at the same > time another core try to attach new UDC, which will cause deadlock as > below scenario. Thus we should release ffs lock before issuing > unregister_gadget_item(). > > [ 52.642225]

[PATCH] usb: gadget: f_fs: Fix possibe deadlock

When system try to close /dev/usb-ffs/adb/ep0 on one core, at the same time another core try to attach new UDC, which will cause deadlock as below scenario. Thus we should release ffs lock before issuing unregister_gadget_item(). [ 52.642225] c1