linux-kernel - [PATCH v3] ASoC: hdac_hdmi: check error return

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Message-Id: <1448960375-9710-1-git-send-email-sudipm.mukherjee@gmail.com>
Date:	Tue,  1 Dec 2015 14:29:35 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH v3] ASoC: hdac_hdmi: check error return

As hdac->num_nodes is unsigned we can not check if
snd_hdac_get_sub_nodes() has returned error or success. Lets have a
temporary int to check the error value.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---

v2: made num_nodes as int, but Takashi said that num_nodes should really
be an unsigned.
v1: removed the error check as that condition is always false.

 sound/soc/codecs/hdac_hdmi.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index 205f2c2..1a2f33b 100644
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -409,17 +409,18 @@ static int hdac_hdmi_init_dai_map(struct hdac_ext_device *edev,
 static int hdac_hdmi_parse_and_map_nid(struct hdac_ext_device *edev)
 {
 	hda_nid_t nid;
-	int i;
+	int i, num_nodes;
 	struct hdac_device *hdac = &edev->hdac;
 	struct hdac_hdmi_priv *hdmi = edev->private_data;
 	int cvt_nid = 0, pin_nid = 0;
 
-	hdac->num_nodes = snd_hdac_get_sub_nodes(hdac, hdac->afg, &nid);
-	if (!nid || hdac->num_nodes < 0) {
+	num_nodes = snd_hdac_get_sub_nodes(hdac, hdac->afg, &nid);
+	if (!nid || num_nodes < 0) {
 		dev_warn(&hdac->dev, "HDMI: failed to get afg sub nodes\n");
 		return -EINVAL;
 	}
 
+	hdac->num_nodes = num_nodes;
 	hdac->start_nid = nid;
 
 	for (i = 0; i < hdac->num_nodes; i++, nid++) {
-- 
1.9.1

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