Patch "ASoC: sun4i-codec: return error code instead of NULL when create_card fails" has been added to the 4.4-stable tree

Patch "ASoC: sun4i-codec: return error code instead of NULL when create_card fails" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ASoC: sun4i-codec: return error code instead of NULL when create_card fails

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     asoc-sun4i-codec-return-error-code-instead-of-null-when-create_card-fails.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 85915b63ad8b796848f431b66c9ba5e356e722e5 Mon Sep 17 00:00:00 2001
From: Chen-Yu Tsai <wens@csie.org>
Date: Mon, 31 Oct 2016 14:42:09 +0800
Subject: ASoC: sun4i-codec: return error code instead of NULL when create_card fails

From: Chen-Yu Tsai <wens@csie.org>

commit 85915b63ad8b796848f431b66c9ba5e356e722e5 upstream.

When sun4i_codec_create_card fails, we do not assign a proper error
code to the return value. The return value would be 0 from the previous
function call, or we would have bailed out sooner. This would confuse
the driver core into thinking the device probe succeeded, when in fact
it didn't, leaving various devres based resources lingering.

Make the create_card function pass back a meaningful error code, and
assign it to the return value.

Fixes: 45fb6b6f2aa3 ("ASoC: sunxi: add support for the on-chip codec on
		      early Allwinner SoCs")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/soc/sunxi/sun4i-codec.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/sound/soc/sunxi/sun4i-codec.c
+++ b/sound/soc/sunxi/sun4i-codec.c
@@ -575,11 +575,11 @@ static struct snd_soc_card *sun4i_codec_
 
 	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
 	if (!card)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	card->dai_link = sun4i_codec_create_link(dev, &card->num_links);
 	if (!card->dai_link)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	card->dev		= dev;
 	card->name		= "sun4i-codec";
@@ -661,7 +661,8 @@ static int sun4i_codec_probe(struct plat
 	}
 
 	card = sun4i_codec_create_card(&pdev->dev);
-	if (!card) {
+	if (IS_ERR(card)) {
+		ret = PTR_ERR(card);
 		dev_err(&pdev->dev, "Failed to create our card\n");
 		goto err_unregister_codec;
 	}


Patches currently in stable-queue which might be from wens@csie.org are

queue-4.4/asoc-sun4i-codec-return-error-code-instead-of-null-when-create_card-fails.patch