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Message-Id: <20210712060955.806133690@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:11:57 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Christophe JAILLET <christophe.jaillet@...adoo.fr>,
Takashi Sakamoto <o-takashi@...amocchi.jp>,
Takashi Iwai <tiwai@...e.de>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 557/593] ALSA: firewire-lib: Fix amdtp_domain_start() when no AMDTP_OUT_STREAM stream is found
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
[ Upstream commit 0cbbeaf370221fc469c95945dd3c1198865c5fe4 ]
The intent here is to return an error code if we don't find what we are
looking for in the 'list_for_each_entry()' loop.
's' is not NULL if the list is empty or if we scan the complete list.
Introduce a new 'found' variable to handle such cases.
Fixes: 60dd49298ec5 ("ALSA: firewire-lib: handle several AMDTP streams in callback handler of IRQ target")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Acked-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
Link: https://lore.kernel.org/r/9c9a53a4905984a570ba5672cbab84f2027dedc1.1624560484.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
sound/firewire/amdtp-stream.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 5805c5de39fb..7a282d8e7148 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -1404,14 +1404,17 @@ int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle)
unsigned int queue_size;
struct amdtp_stream *s;
int cycle;
+ bool found = false;
int err;
// Select an IT context as IRQ target.
list_for_each_entry(s, &d->streams, list) {
- if (s->direction == AMDTP_OUT_STREAM)
+ if (s->direction == AMDTP_OUT_STREAM) {
+ found = true;
break;
+ }
}
- if (!s)
+ if (!found)
return -ENXIO;
d->irq_target = s;
--
2.30.2
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