ALSA: firewire-lib/fireface: fix initial value of data block counter for IR context with CIP_NO_HEADER

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For IR context, ALSA IEC 61883-1/6 engine uses initial value of data
block counter as UINT_MAX, to detect first isochronous packet in the
middle of packet streaming.

At present, when CIP_NO_HEADER is used (i.e. for ALSA fireface driver),
the initial value is used for tracepoints event. 0x00 should be
for the event when the initial value is UINT_MAX because isochronous
packets with CIP_NO_HEADER option has no field for data block count.

This commit fixes the bug.

Fixes: 76864868db ("ALSA: firewire-lib: cache next data_block_counter after probing tracepoints event for IR context")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Takashi Sakamoto 2019-07-07 21:07:54 +09:00 • committed by Takashi Iwai

parent 0ebf3ceb83

commit 7fbf909668

1 changed files with 5 additions and 1 deletions

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sound/firewire/amdtp-stream.c

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