ASoC: Bodge around GCC 4.4.0 flow analysis bug in GCC 4.4.0

GCC 4.4.0 doesn't appear to be able to spot that we don't apply any FLL
configuration if the output frequency is zero.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/codecs/wm8400.c b/sound/soc/codecs/wm8400.c
index 0bf903f..b9ef4d9 100644 (file)
--- a/sound/soc/codecs/wm8400.c
+++ b/sound/soc/codecs/wm8400.c
@@ -1022,10 +1022,15 @@ static int wm8400_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
        if (freq_in == wm8400->fll_in && freq_out == wm8400->fll_out)
                return 0;
 
-       if (freq_out != 0) {
+       if (freq_out) {
                ret = fll_factors(wm8400, &factors, freq_in, freq_out);
                if (ret != 0)
                        return ret;
+       } else {
+               /* Bodge GCC 4.4.0 uninitialised variable warning - it
+                * doesn't seem capable of working out that we exit if
+                * freq_out is 0 before any of the uses. */
+               memset(&factors, 0, sizeof(factors));
        }
 
        wm8400->fll_out = freq_out;
@@ -1040,7 +1045,7 @@ static int wm8400_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
        reg &= ~WM8400_FLL_OSC_ENA;
        wm8400_write(codec, WM8400_FLL_CONTROL_1, reg);
 
-       if (freq_out == 0)
+       if (!freq_out)
                return 0;
 
        reg &= ~(WM8400_FLL_REF_FREQ | WM8400_FLL_FRATIO_MASK);