firewire: core: do not use del_timer_sync() in interrupt context
Because we might be in interrupt context, replace del_timer_sync() with del_timer(). If the timer is already running, we know that it will clean up the transaction, so we do not need to do any further processing in the normal transaction handler. Many thanks to Yong Zhang for diagnosing this. Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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