“77eed219fed5a913f59329cc846420fdeab0150f”上不存在“drivers/media/dvb/dvb-usb/dvb_usb_dvb.c”
block: Add missing locking in bdrv_co_drain_bh_cb()
bdrv_do_drained_begin/end() assume that they are called with the AioContext lock of bs held. If we call drain functions from a coroutine with the AioContext lock held, we yield and schedule a BH to move out of coroutine context. This means that the lock for the home context of the coroutine is released and must be re-acquired in the bottom half. Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NMax Reitz <mreitz@redhat.com>
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