• Takashi Sakamoto's avatar
    ALSA: fireface: update isochronous resources when starting packet streaming after bus-reset · b88f4d7c
    Takashi Sakamoto authored
    After bus reset, isochronous resource manager releases all of allocated
    isochronous resources. The nodes to restart packet streaming should
    request reallocation of the resources.
    
    However, between the bus-reset and invocation of 'struct fw_driver.update'
    handler, ALSA PCM application can detect this situation by XRUN because
    the target device cancelled to transmit packets once bus-reset occurs.
    
    Due to the above mechanism, ALSA fireface driver just stops packet
    streaming in the update handler, thus pcm.prepare handler should
    request the reallocation.
    
    This commit requests the reallocation in pcm.prepare callback when
    bus generation is changed.
    Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    b88f4d7c
ff-protocol-latter.c 10.5 KB