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ALSA: firewire/bebob: Add a workaround for M-Audio special Firewire series

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In post commit, a quirk of this firmware about transactions is reported.
This commit apply a workaround for this quirk.

They often fail transactions due to gap_count mismatch. This state is changed
by generating bus reset.

The fw_schedule_bus_reset() is an exported symbol in firewire-core. But there
are no header for public. This commit moves its prototype from
drivers/firewire/core.h to include/linux/firewire.h.

This mismatch still affects bus management before generating this bus reset.
It still takes a time to call driver's probe() because transactions are still
often failed.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2014-04-25 22:45:30 +09:00 • committed by Takashi Iwai
parent a2b2a7798f
commit 9b1ee0b2cb
4 changed files with 32 additions and 5 deletions
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3
include/linux/firewire.h
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@ -367,6 +367,9 @@ static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
return tag << 14 | channel << 8 | sy;
}
void fw_schedule_bus_reset(struct fw_card *card, bool delayed,
bool short_reset);
struct fw_descriptor {
struct list_head link;
size_t length;