From: Herbert Xu <herbert@gondor.apana.org.au>
To: Jeff Garzik <jgarzik@pobox.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [I810_AUDIO] 2/x: Fix wait queue race in drain_dac
Date: Sat, 22 Nov 2003 18:13:45 +1100 [thread overview]
Message-ID: <20031122071345.GA27303@gondor.apana.org.au> (raw)
In-Reply-To: <20031122070931.GA27231@gondor.apana.org.au>
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Hi:
This patch fixes the value of swptr in case of an underrun/overrun.
Overruns/underruns probably won't occur at all when the driver is
fixed properly, but this doesn't hurt.
--
Debian GNU/Linux 3.0 is out! ( http://www.debian.org/ )
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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Index: kernel-source-2.4/drivers/sound/i810_audio.c
===================================================================
RCS file: /home/gondolin/herbert/src/CVS/debian/kernel-source-2.4/drivers/sound/i810_audio.c,v
retrieving revision 1.9
diff -u -r1.9 i810_audio.c
--- kernel-source-2.4/drivers/sound/i810_audio.c 22 Nov 2003 07:05:27 -0000 1.9
+++ kernel-source-2.4/drivers/sound/i810_audio.c 22 Nov 2003 07:11:25 -0000
@@ -1445,8 +1445,8 @@
}
continue;
}
- swptr = dmabuf->swptr;
cnt = i810_get_available_read_data(state);
+ swptr = dmabuf->swptr;
// this is to make the copy_to_user simpler below
if(cnt > (dmabuf->dmasize - swptr))
cnt = dmabuf->dmasize - swptr;
@@ -1589,8 +1589,8 @@
continue;
}
- swptr = dmabuf->swptr;
cnt = i810_get_free_write_space(state);
+ swptr = dmabuf->swptr;
/* Bound the maximum size to how much we can copy to the
* dma buffer before we hit the end. If we have more to
* copy then it will get done in a second pass of this
next prev parent reply other threads:[~2003-11-22 7:13 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-22 7:09 [I810_AUDIO] 1/x: Fix wait queue race in drain_dac Herbert Xu
2003-11-22 7:13 ` Herbert Xu [this message]
2003-11-22 7:19 ` [I810_AUDIO] 3/x: Remove bogus CIV_TO_LVI Herbert Xu
2003-11-22 8:22 ` [I810_AUDIO] 4/x: Clean up with macros Herbert Xu
2003-11-22 8:26 ` [I810_AUDIO] 5/x: Fixed partial DMA transfers Herbert Xu
2003-11-22 8:39 ` Herbert Xu
2003-11-22 23:51 ` [I810_AUDIO] 7/x: Fix OSS fragments Herbert Xu
2003-11-22 23:53 ` [I810_AUDIO] 8/x: Remove divides on playback Herbert Xu
2003-11-23 0:02 ` [I810_AUDIO] 9/x: Fix drain_dac loop when signals_allowed == 0 Herbert Xu
2003-11-23 11:04 ` [I810_AUDIO] 10/x: Fix reads/writes % 4 != 0 Herbert Xu
2004-01-17 3:58 ` [I810_AUDIO] 11/x: Fix dead lock in drain_dac Herbert Xu
2004-01-11 21:04 ` [I810_AUDIO] 2/x: Fix wait queue race " Jeff Garzik
2003-12-18 7:23 ` [I810_AUDIO] 1/x: " Jeff Garzik
2004-01-11 21:00 ` Jeff Garzik
2004-01-12 9:46 ` Herbert Xu
2004-01-12 21:48 ` Jeff Garzik
2004-01-12 22:26 ` Herbert Xu
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