ALSA: firewire-lib: fix to process MIDI conformant data channel for AM824 format
In IEC 61883-6, 8 MIDI data streams are multiplexed into single MIDI conformant data channel. The index of stream is calculated by modulo 8 of the value of data block counter. Therefore data block processing layer requires valid value of data block counter. In recent changes of ALSA IEC 61883-1/6 engine, the value of data block counter is changed before calling data block processing layer. This brings miss detection of MIDI messages in non-blocking transmission method is used. This commit fixes the bug by changing chached data block counter after calling data block processing layer. Fixes: e335425b ("ALSA: firewire-lib: split helper function to check incoming CIP header") Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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