ASoC: ab8500: Fix invalid cast to long pointer

Don't cast to long pointers blindly just for using find_first_bit()
and co.  This is certainly not portable at all.

Reimplement the code with ffs() and fls() instead.  This is a slight
optimization, too.

Spotted by coverity CID 1056484 and 1056485.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/codecs/ab8500-codec.c b/sound/soc/codecs/ab8500-codec.c
index 10be4cbfe969f22418fb48f52d2016c52fd0cc2e..3ef481551740dba7df6aa9f405a8ce7f83bf0ddc 100644 (file)
--- a/sound/soc/codecs/ab8500-codec.c
+++ b/sound/soc/codecs/ab8500-codec.c
@@ -2295,17 +2295,17 @@ static int ab8500_codec_set_dai_tdm_slot(struct snd_soc_dai *dai,
        case 0:
                break;
        case 1:
-               slot = find_first_bit((unsigned long *)&tx_mask, 32);
+               slot = ffs(tx_mask);
                snd_soc_update_bits(codec, AB8500_DASLOTCONF1, mask, slot);
                snd_soc_update_bits(codec, AB8500_DASLOTCONF3, mask, slot);
                snd_soc_update_bits(codec, AB8500_DASLOTCONF2, mask, slot);
                snd_soc_update_bits(codec, AB8500_DASLOTCONF4, mask, slot);
                break;
        case 2:
-               slot = find_first_bit((unsigned long *)&tx_mask, 32);
+               slot = ffs(tx_mask);
                snd_soc_update_bits(codec, AB8500_DASLOTCONF1, mask, slot);
                snd_soc_update_bits(codec, AB8500_DASLOTCONF3, mask, slot);
-               slot = find_next_bit((unsigned long *)&tx_mask, 32, slot + 1);
+               slot = fls(tx_mask);
                snd_soc_update_bits(codec, AB8500_DASLOTCONF2, mask, slot);
                snd_soc_update_bits(codec, AB8500_DASLOTCONF4, mask, slot);
                break;
@@ -2336,18 +2336,18 @@ static int ab8500_codec_set_dai_tdm_slot(struct snd_soc_dai *dai,
        case 0:
                break;
        case 1:
-               slot = find_first_bit((unsigned long *)&rx_mask, 32);
+               slot = ffs(rx_mask);
                snd_soc_update_bits(codec, AB8500_ADSLOTSEL(slot),
                                AB8500_MASK_SLOT(slot),
                                AB8500_ADSLOTSELX_AD_OUT_TO_SLOT(AB8500_AD_OUT3, slot));
                break;
        case 2:
-               slot = find_first_bit((unsigned long *)&rx_mask, 32);
+               slot = ffs(rx_mask);
                snd_soc_update_bits(codec,
                                AB8500_ADSLOTSEL(slot),
                                AB8500_MASK_SLOT(slot),
                                AB8500_ADSLOTSELX_AD_OUT_TO_SLOT(AB8500_AD_OUT3, slot));
-               slot = find_next_bit((unsigned long *)&rx_mask, 32, slot + 1);
+               slot = fls(rx_mask);
                snd_soc_update_bits(codec,
                                AB8500_ADSLOTSEL(slot),
                                AB8500_MASK_SLOT(slot),