This series will prevent race between ep0_queue_wait & functionfs_unbind. Currently, both routines are running without any kind of serialization to make sure ep0req doesn't get corrupted. Changes in v4: Split the implementation of v3 [1] into a series for better clarity. Also, tested the patches by running USB plug-in/plug-out along with composition switch. Changes in v3: Moved dequeue out of mutex to prevent deadlock. Changes in v2: Replaces spinlock with mutex & added dequeue operation in unbind. [1]: https://patchwork.kernel.org/project/linux-usb/patch/20221125054119.25135-1-quic_ugoswami@xxxxxxxxxxx/ Udipto Goswami (2): usb: gadget: f_fs: Prevent race during ffs_ep0_queue_wait usb: gadget: f_fs: Ensure ep0req is dequeued before free_request drivers/usb/gadget/function/f_fs.c | 7 +++++++ 1 file changed, 7 insertions(+) -- 2.17.1
