linux-kernel - [PATCH 02/11] ASoC: ab8500: Revert back to find_next

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1387468508-12286-3-git-send-email-lee.jones@linaro.org>
Date:	Thu, 19 Dec 2013 15:54:59 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	linus.walleij@...aro.org, broonie@...nel.org,
	alsa-devel@...a-project.org, Lee Jones <lee.jones@...aro.org>,
	Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 02/11] ASoC: ab8500: Revert back to find_next_bit()

Commit '166a34d ASoC: ab8500: Fix invalid cast to long pointer'
rather carelessly converts find_next_bit() to fls() (find last
bit set), which are not the same.

Although this implementation may not be portable, the alternative
breaks audio on anything using the AB8500 CODEC, which is a much
greater evil. Besides, this driver will never run on anything
else.

Cc: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 sound/soc/codecs/ab8500-codec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/ab8500-codec.c b/sound/soc/codecs/ab8500-codec.c
index 1ad92cb..51ae3e9 100644
--- a/sound/soc/codecs/ab8500-codec.c
+++ b/sound/soc/codecs/ab8500-codec.c
@@ -2322,7 +2322,7 @@ static int ab8500_codec_set_dai_tdm_slot(struct snd_soc_dai *dai,
 		slot = ffs(tx_mask);
 		snd_soc_update_bits(codec, AB8500_DASLOTCONF1, mask, slot);
 		snd_soc_update_bits(codec, AB8500_DASLOTCONF3, mask, slot);
-		slot = fls(tx_mask);
+		slot = find_next_bit((unsigned long *)&tx_mask, 32, slot + 1);
 		snd_soc_update_bits(codec, AB8500_DASLOTCONF2, mask, slot);
 		snd_soc_update_bits(codec, AB8500_DASLOTCONF4, mask, slot);
 		break;
@@ -2364,7 +2364,7 @@ static int ab8500_codec_set_dai_tdm_slot(struct snd_soc_dai *dai,
 				AB8500_ADSLOTSEL(slot),
 				AB8500_MASK_SLOT(slot),
 				AB8500_ADSLOTSELX_AD_OUT_TO_SLOT(AB8500_AD_OUT3, slot));
-		slot = fls(rx_mask);
+		slot = find_next_bit((unsigned long *)&rx_mask, 32, slot + 1);
 		snd_soc_update_bits(codec,
 				AB8500_ADSLOTSEL(slot),
 				AB8500_MASK_SLOT(slot),
-- 
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/