ALSA: dice: fix regression for Lexicon I-ONIX FW810S

For Lexicon I-ONIX FW810S, the call of ioctl(2) with SNDRV_PCM_IOCTL_HW_PARAMS can returns -ETIMEDOUT. This is a regression due to the commit 41319eb ("ALSA: dice: wait just for NOTIFY_CLOCK_ACCEPTED after GLOBAL_CLOCK_SELECT operation"). The device does not emit NOTIFY_CLOCK_ACCEPTED notification when accepting GLOBAL_CLOCK_SELECT operation with the same parameters as current ones. This commit fixes the regression. When receiving no notification, return -ETIMEDOUT as long as operating for any change. Fixes: 41319eb ("ALSA: dice: wait just for NOTIFY_CLOCK_ACCEPTED after GLOBAL_CLOCK_SELECT operation") Cc: <[email protected]> Signed-off-by: Takashi Sakamoto <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Takashi Iwai <[email protected]>
niw · Nov 30, 2022 · 9b84f0f · 9b84f0f
1 parent ecae4c8
commit 9b84f0f
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/sound/firewire/dice/dice-stream.c b/sound/firewire/dice/dice-stream.c
@@ -59,7 +59,7 @@ int snd_dice_stream_get_rate_mode(struct snd_dice *dice, unsigned int rate,
 
 static int select_clock(struct snd_dice *dice, unsigned int rate)
 {
-	__be32 reg;
+	__be32 reg, new;
 	u32 data;
 	int i;
 	int err;
@@ -83,15 +83,17 @@ static int select_clock(struct snd_dice *dice, unsigned int rate)
 	if (completion_done(&dice->clock_accepted))
 		reinit_completion(&dice->clock_accepted);
 
-	reg = cpu_to_be32(data);
+	new = cpu_to_be32(data);
 	err = snd_dice_transaction_write_global(dice, GLOBAL_CLOCK_SELECT,
-						&reg, sizeof(reg));
+						&new, sizeof(new));
 	if (err < 0)
 		return err;
 
 	if (wait_for_completion_timeout(&dice->clock_accepted,
-			msecs_to_jiffies(NOTIFICATION_TIMEOUT_MS)) == 0)
-		return -ETIMEDOUT;
+			msecs_to_jiffies(NOTIFICATION_TIMEOUT_MS)) == 0) {
+		if (reg != new)
+			return -ETIMEDOUT;
+	}
 
 	return 0;
 }