linux-kernel - [PATCH v2] greybus: audio_codec: initialize data to silence static checker warnings

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Message-Id: <20220414084219.13501-1-xiam0nd.tong@gmail.com>
Date:   Thu, 14 Apr 2022 16:42:19 +0800
From:   Xiaomeng Tong <xiam0nd.tong@...il.com>
To:     vaibhav.sr@...il.com, dan.carpenter@...cle.com,
        mgreer@...malcreek.com, johan@...nel.org, elder@...nel.org,
        gregkh@...uxfoundation.org
Cc:     greybus-dev@...ts.linaro.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Xiaomeng Tong <xiam0nd.tong@...il.com>
Subject: [PATCH v2] greybus: audio_codec: initialize data to silence static checker warnings

These three declares are here:
	struct gbaudio_data_connection *data;

Since all three of these functions check for if the codec->module_list is
empty at the start of the function so these are not real bugs to bypass
'if (!data) {'. To avoid static checker warnings like Smatch, initialize
the data with NULL.

Signed-off-by: Xiaomeng Tong <xiam0nd.tong@...il.com>
---
changes since v1:
 - not bug, but can avoid warnnings (Dan Carpenter)

v1: https://lore.kernel.org/lkml/20220327060120.4316-1-xiam0nd.tong@gmail.com/
---
 drivers/staging/greybus/audio_codec.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/greybus/audio_codec.c b/drivers/staging/greybus/audio_codec.c
index b589cf6b1d03..939e05af4dcf 100644
--- a/drivers/staging/greybus/audio_codec.c
+++ b/drivers/staging/greybus/audio_codec.c
@@ -397,7 +397,7 @@ static int gbcodec_hw_params(struct snd_pcm_substream *substream,
 	u8 sig_bits, channels;
 	u32 format, rate;
 	struct gbaudio_module_info *module;
-	struct gbaudio_data_connection *data;
+	struct gbaudio_data_connection *data = NULL;
 	struct gb_bundle *bundle;
 	struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
 	struct gbaudio_stream_params *params;
@@ -498,7 +498,7 @@ static int gbcodec_prepare(struct snd_pcm_substream *substream,
 {
 	int ret;
 	struct gbaudio_module_info *module;
-	struct gbaudio_data_connection *data;
+	struct gbaudio_data_connection *data = NULL;
 	struct gb_bundle *bundle;
 	struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
 	struct gbaudio_stream_params *params;
@@ -562,7 +562,7 @@ static int gbcodec_prepare(struct snd_pcm_substream *substream,
 static int gbcodec_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
 {
 	int ret;
-	struct gbaudio_data_connection *data;
+	struct gbaudio_data_connection *data = NULL;
 	struct gbaudio_module_info *module;
 	struct gb_bundle *bundle;
 	struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
-- 
2.17.1