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From: Takashi Iwai <tiwai@suse.de>
To: David Binderman <dcb314@hotmail.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: linux-4.6-rc4/sound/pci/ens1370.c:1551: possible bad expression ?
Date: Tue, 19 Apr 2016 15:31:54 +0200	[thread overview]
Message-ID: <s5hvb3d3et1.wl-tiwai@suse.de> (raw)
In-Reply-To: <DUB128-W43C83AA6E3851834E8340F9C6B0@phx.gbl>

On Mon, 18 Apr 2016 18:17:58 +0200,
David Binderman wrote:
> 
> Hello there,
> 
> [linux-4.6-rc4/sound/pci/ens1370.c:1551]: (style) Expression '(X & 0xf0000)>= 0x4' is always false.
> 
> Source code is
> 
>     if ((ensoniq->ctrl & ES_1371_GPIO_OUTM)>= 4)
>         val = 1;

Thanks for the report.  It's fixed now by the patch below.


Takashi

-- 8< --
From: Takashi Iwai <tiwai@suse.de>
Subject: [PATCH] ALSA: ens1371: Fix "Line In->Rear Out Switch" control

The "Line In->Rear Out Switch" control on ens1371 driver returns a
bogus value, always true, as its check is totally broken.  Fix it to
check the proper GPIO bit mask.

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/ens1370.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/ens1370.c b/sound/pci/ens1370.c
index 0dc44ebb0032..626cd2167d29 100644
--- a/sound/pci/ens1370.c
+++ b/sound/pci/ens1370.c
@@ -1548,7 +1548,7 @@ static int snd_es1373_line_get(struct snd_kcontrol *kcontrol,
 	int val = 0;
 	
 	spin_lock_irq(&ensoniq->reg_lock);
-	if ((ensoniq->ctrl & ES_1371_GPIO_OUTM) >= 4)
+	if (ensoniq->ctrl & ES_1371_GPIO_OUT(4))
 	    	val = 1;
 	ucontrol->value.integer.value[0] = val;
 	spin_unlock_irq(&ensoniq->reg_lock);
-- 
2.8.1

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WARNING: multiple messages have this Message-ID (diff)
From: Takashi Iwai <tiwai@suse.de>
To: "David Binderman" <dcb314@hotmail.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
	"perex@perex.cz" <perex@perex.cz>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: linux-4.6-rc4/sound/pci/ens1370.c:1551: possible bad expression ?
Date: Tue, 19 Apr 2016 15:31:54 +0200	[thread overview]
Message-ID: <s5hvb3d3et1.wl-tiwai@suse.de> (raw)
In-Reply-To: <DUB128-W43C83AA6E3851834E8340F9C6B0@phx.gbl>

On Mon, 18 Apr 2016 18:17:58 +0200,
David Binderman wrote:
> 
> Hello there,
> 
> [linux-4.6-rc4/sound/pci/ens1370.c:1551]: (style) Expression '(X & 0xf0000)>= 0x4' is always false.
> 
> Source code is
> 
>     if ((ensoniq->ctrl & ES_1371_GPIO_OUTM)>= 4)
>         val = 1;

Thanks for the report.  It's fixed now by the patch below.


Takashi

-- 8< --
From: Takashi Iwai <tiwai@suse.de>
Subject: [PATCH] ALSA: ens1371: Fix "Line In->Rear Out Switch" control

The "Line In->Rear Out Switch" control on ens1371 driver returns a
bogus value, always true, as its check is totally broken.  Fix it to
check the proper GPIO bit mask.

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/ens1370.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/ens1370.c b/sound/pci/ens1370.c
index 0dc44ebb0032..626cd2167d29 100644
--- a/sound/pci/ens1370.c
+++ b/sound/pci/ens1370.c
@@ -1548,7 +1548,7 @@ static int snd_es1373_line_get(struct snd_kcontrol *kcontrol,
 	int val = 0;
 	
 	spin_lock_irq(&ensoniq->reg_lock);
-	if ((ensoniq->ctrl & ES_1371_GPIO_OUTM) >= 4)
+	if (ensoniq->ctrl & ES_1371_GPIO_OUT(4))
 	    	val = 1;
 	ucontrol->value.integer.value[0] = val;
 	spin_unlock_irq(&ensoniq->reg_lock);
-- 
2.8.1

  reply	other threads:[~2016-04-19 13:31 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <DUB128-W44E71E14CBE4AC54396DFA9C6B0@phx.gbl>
2016-04-18 16:17 ` linux-4.6-rc4/sound/pci/ens1370.c:1551: possible bad expression ? David Binderman
2016-04-19 13:31   ` Takashi Iwai [this message]
2016-04-19 13:31     ` Takashi Iwai
2016-04-21  6:38   ` Clemens Ladisch
2016-04-21  6:38     ` [alsa-devel] " Clemens Ladisch
2016-04-21  7:11     ` David Binderman

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