diff mbox

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

Message ID 20161031064209.12241-1-wens@csie.org (mailing list archive)
State Accepted
Commit 85915b63ad8b796848f431b66c9ba5e356e722e5
Headers show

Commit Message

Chen-Yu Tsai Oct. 31, 2016, 6:42 a.m. UTC
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>
---

In practice this should be really hard to hit, as the only failures in
create_card are memory allocation failures.

Should we mark this for stable?

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

Patch

diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
index e047ec06d538..a60707761abf 100644
--- a/sound/soc/sunxi/sun4i-codec.c
+++ b/sound/soc/sunxi/sun4i-codec.c
@@ -765,11 +765,11 @@  static struct snd_soc_card *sun4i_codec_create_card(struct device *dev)
 
 	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";
@@ -876,7 +876,8 @@  static int sun4i_codec_probe(struct platform_device *pdev)
 	}
 
 	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;
 	}