FAILED: patch "[PATCH] ALSA: timer: Relax start tick time check for slave timer" failed to apply to 5.10-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x ccbfcac05866ebe6eb3bc6d07b51d4ed4fcde436
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2024081930-commuting-makeover-de1c@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..

Possible dependencies:

ccbfcac05866 ("ALSA: timer: Relax start tick time check for slave timer elements")
4a63bd179fa8 ("ALSA: timer: Set lower bound of start tick time")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From ccbfcac05866ebe6eb3bc6d07b51d4ed4fcde436 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Sat, 10 Aug 2024 10:48:32 +0200
Subject: [PATCH] ALSA: timer: Relax start tick time check for slave timer
 elements

The recent addition of a sanity check for a too low start tick time
seems breaking some applications that uses aloop with a certain slave
timer setup.  They may have the initial resolution 0, hence it's
treated as if it were a too low value.

Relax and skip the check for the slave timer instance for addressing
the regression.

Fixes: 4a63bd179fa8 ("ALSA: timer: Set lower bound of start tick time")
Cc: <stable@vger.kernel.org>
Link: https://github.com/raspberrypi/linux/issues/6294
Link: https://patch.msgid.link/20240810084833.10939-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/timer.c b/sound/core/timer.c
index d104adc75a8b..71a07c1662f5 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -547,7 +547,7 @@ static int snd_timer_start1(struct snd_timer_instance *timeri,
 	/* check the actual time for the start tick;
 	 * bail out as error if it's way too low (< 100us)
 	 */
-	if (start) {
+	if (start && !(timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) {
 		if ((u64)snd_timer_hw_resolution(timer) * ticks < 100000)
 			return -EINVAL;
 	}