From: Takashi Sakamoto Date: Fri, 1 Nov 2019 13:13:21 +0000 (+0900) Subject: ALSA: bebob: expand sleep just after breaking connections for protocol version 1 X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d3eabe939aee3ffd5b133766a932629a9746298c;p=linux.git ALSA: bebob: expand sleep just after breaking connections for protocol version 1 As long as I investigated, some devices with BeBoB protocol version 1 can be freezed during several hundreds milliseconds after breaking connections. When accessing during the freezed time, any transaction is corrupted. In the worst case, the device is going to reboot. I can see this issue in: * Roland FA-66 * M-Audio FireWire Solo This commit expands sleep just after breaking connections to avoid the freezed time as much as possible. I note that the freeze/reboot behaviour is similar to below models: * Focusrite Saffire Pro 10 I/O * Focusrite Saffire Pro 26 I/O The above models certainly reboot after breaking connections. Signed-off-by: Takashi Sakamoto Link: https://lore.kernel.org/r/20191101131323.17300-2-o-takashi@sakamocchi.jp Signed-off-by: Takashi Iwai --- diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c index f7f0db5aa8112..1b264d0d63ebd 100644 --- a/sound/firewire/bebob/bebob_stream.c +++ b/sound/firewire/bebob/bebob_stream.c @@ -415,15 +415,16 @@ static int make_both_connections(struct snd_bebob *bebob) return 0; } -static void -break_both_connections(struct snd_bebob *bebob) +static void break_both_connections(struct snd_bebob *bebob) { cmp_connection_break(&bebob->in_conn); cmp_connection_break(&bebob->out_conn); - /* These models seems to be in transition state for a longer time. */ - if (bebob->maudio_special_quirk != NULL) - msleep(200); + // These models seem to be in transition state for a longer time. When + // accessing in the state, any transactions is corrupted. In the worst + // case, the device is going to reboot. + if (bebob->version < 2) + msleep(600); } static int