linux-kernel - [PATCH 4.4 10/91] ALSA: wss: Fix invalid snd_free

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Date:   Tue, 11 Dec 2018 16:40:29 +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, Takashi Sakamoto <o-takashi@...amocchi.jp>,
        Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 4.4 10/91] ALSA: wss: Fix invalid snd_free_pages() at error path

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

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

From: Takashi Iwai <tiwai@...e.de>

commit 7b69154171b407844c273ab4c10b5f0ddcd6aa29 upstream.

Some spurious calls of snd_free_pages() have been overlooked and
remain in the error paths of wss driver code.  Since runtime->dma_area
is managed by the PCM core helper, we shouldn't release manually.

Drop the superfluous calls.

Reviewed-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
Cc: <stable@...r.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/isa/wss/wss_lib.c |    2 --
 1 file changed, 2 deletions(-)

--- a/sound/isa/wss/wss_lib.c
+++ b/sound/isa/wss/wss_lib.c
@@ -1531,7 +1531,6 @@ static int snd_wss_playback_open(struct
 	if (err < 0) {
 		if (chip->release_dma)
 			chip->release_dma(chip, chip->dma_private_data, chip->dma1);
-		snd_free_pages(runtime->dma_area, runtime->dma_bytes);
 		return err;
 	}
 	chip->playback_substream = substream;
@@ -1572,7 +1571,6 @@ static int snd_wss_capture_open(struct s
 	if (err < 0) {
 		if (chip->release_dma)
 			chip->release_dma(chip, chip->dma_private_data, chip->dma2);
-		snd_free_pages(runtime->dma_area, runtime->dma_bytes);
 		return err;
 	}
 	chip->capture_substream = substream;