From 1f5353e765fe2a1168477bfe55e4dd7cdd96b477 Mon Sep 17 00:00:00 2001 From: Tim Gardner Date: Sun, 10 Mar 2013 10:58:21 -0600 Subject: [PATCH] ASoC: wm_hubs: Silence reg_r and reg_l 'may be used uninitialized' warnings Return an error from wm_hubs_read_dc_servo() if hubs->dcs_readback_mode is not correctly initialized. You might as well bail out since nothing is likely to work correctly afterwards. sound/soc/codecs/wm_hubs.c:321:11: warning: 'reg_r' may be used uninitialized in this function [-Wuninitialized] sound/soc/codecs/wm_hubs.c:251:13: note: 'reg_r' was declared here sound/soc/codecs/wm_hubs.c:322:11: warning: 'reg_l' may be used uninitialized in this function [-Wuninitialized] sound/soc/codecs/wm_hubs.c:251:6: note: 'reg_l' was declared here gcc version 4.6.3 Signed-off-by: Tim Gardner Signed-off-by: Mark Brown --- sound/soc/codecs/wm_hubs.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/sound/soc/codecs/wm_hubs.c b/sound/soc/codecs/wm_hubs.c index 867ae97ddcec..f5d81b948759 100644 --- a/sound/soc/codecs/wm_hubs.c +++ b/sound/soc/codecs/wm_hubs.c @@ -199,11 +199,12 @@ static void wm_hubs_dcs_cache_set(struct snd_soc_codec *codec, u16 dcs_cfg) list_add_tail(&cache->list, &hubs->dcs_cache); } -static void wm_hubs_read_dc_servo(struct snd_soc_codec *codec, +static int wm_hubs_read_dc_servo(struct snd_soc_codec *codec, u16 *reg_l, u16 *reg_r) { struct wm_hubs_data *hubs = snd_soc_codec_get_drvdata(codec); u16 dcs_reg, reg; + int ret = 0; switch (hubs->dcs_readback_mode) { case 2: @@ -236,8 +237,9 @@ static void wm_hubs_read_dc_servo(struct snd_soc_codec *codec, break; default: WARN(1, "Unknown DCS readback method\n"); - return; + ret = -1; } + return ret; } /* @@ -286,7 +288,8 @@ static void enable_dc_servo(struct snd_soc_codec *codec) WM8993_DCS_TRIG_STARTUP_1); } - wm_hubs_read_dc_servo(codec, ®_l, ®_r); + if (wm_hubs_read_dc_servo(codec, ®_l, ®_r) < 0) + return; dev_dbg(codec->dev, "DCS input: %x %x\n", reg_l, reg_r); -- 2.30.2