linux-kernel - Re: [PATCH] ALSA: use __devexit

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Date:	Mon, 25 Jun 2007 12:46:05 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	perex@...e.cz, Randy Dunlap <randy.dunlap@...cle.com>,
	akpm <akpm@...ux-foundation.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ALSA: use __devexit_p

At Sat, 23 Jun 2007 18:50:57 -0400,
Jeff Garzik wrote:
> 
> This reminds me...
> 
> Someone needs to go through ALSA and audit all delays executed via 
> $FOO_interruptible().
> 
> Several delays within ALSA wait for hardware conditions, and do not 
> check for signals pending, which means that the wait-for-condition loop 
> becomes a busy loop:
> 
> 	while (1) {
> 		foo = read_hardware()
> 		if (foo & interesting_bits)
> 			break;
> 		schedule_timeout_interruptible(1);
> 	}
> 
> The proper fix is (a) remove "_interruptible" [recommended] or (b) check 
> for signals.
> 
> grep'ing for "_interruptible" quickly finds several such ALSA bugs.

Yep...  I fixed now on ALSA tree.  Thanks for hints!


Takashi
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