linux-kernel - [PATCH 3.19 114/177] ALSA: oxfw: fix a condition and return code in start

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Date:	Mon, 16 Mar 2015 15:08:41 +0100
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
	Takashi Sakamoto <o-takashi@...amocchi.jp>,
	Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 3.19 114/177] ALSA: oxfw: fix a condition and return code in start_stream()

3.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Sakamoto <o-takashi@...amocchi.jp>

commit f2b14c0bc510c6a8f67a4f36049deefe5d99a537 upstream.

The amdtp_stream_wait_callback() doesn't return minus value and
the return code is not for error code.

This commit fixes with a propper condition and an error code.

Fixes: f3699e2c7745 ('ALSA: oxfw: Change the way to start stream')
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/firewire/oxfw/oxfw-stream.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/sound/firewire/oxfw/oxfw-stream.c
+++ b/sound/firewire/oxfw/oxfw-stream.c
@@ -171,9 +171,10 @@ static int start_stream(struct snd_oxfw
 	}
 
 	/* Wait first packet */
-	err = amdtp_stream_wait_callback(stream, CALLBACK_TIMEOUT);
-	if (err < 0)
+	if (!amdtp_stream_wait_callback(stream, CALLBACK_TIMEOUT)) {
 		stop_stream(oxfw, stream);
+		err = -ETIMEDOUT;
+	}
 end:
 	return err;
 }


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