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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2019-11-01 22:13:21 +0900
committerTakashi Iwai <tiwai@suse.de>2019-11-02 08:49:50 +0100
commitd3eabe939aee3ffd5b133766a932629a9746298c (patch)
treecdf3df790199fb9e71129ff893e863e04c5273b8 /sound/firewire
parent0929249e3be3bb82ee6cfec0025f4dde952210b3 (diff)
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 <o-takashi@sakamocchi.jp> Link: https://lore.kernel.org/r/20191101131323.17300-2-o-takashi@sakamocchi.jp Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire')
-rw-r--r--sound/firewire/bebob/bebob_stream.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c
index f7f0db5aa811..1b264d0d63eb 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