From: Linus Torvalds <torvalds@linux-foundation.org>
To: Larry Finger <Larry.Finger@lwfinger.net>
Cc: "John W. Linville" <linville@tuxdriver.com>,
"David S. Miller" <davem@davemloft.net>,
wireless <linux-wireless@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@suse.de>
Subject: Re: Make b43 driver fall back gracefully to PIO mode after fatal DMA errors
Date: Fri, 26 Feb 2010 12:06:49 -0800 (PST) [thread overview]
Message-ID: <alpine.LFD.2.00.1002261205160.4513@localhost.localdomain> (raw)
In-Reply-To: <alpine.LFD.2.00.1002261112590.4513@localhost.localdomain>
On Fri, 26 Feb 2010, Linus Torvalds wrote:
> On Fri, 26 Feb 2010, Larry Finger wrote:
> >
> > Incidentally, we have learned today that the fault does not occur when running
> > MMIO traces, and that it is not SMP related.
>
> Timing? I guess MMIO tracing will slow down the actual command setup part
> a lot.
Adding a "udelay(10)" to the "b43_write[16|32]()" functions doesn't make
any difference on the machine I have access to, though.
Ill happily test other ideas or patches. Automatically falling back to PIO
makes things work, but I'd obviously _much_ rather have working DMA.
Linus
next prev parent reply other threads:[~2010-02-26 20:07 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <alpine.LFD.2.00.1002261034140.4513@localhost.localdomain>
2010-02-26 19:09 ` Make b43 driver fall back gracefully to PIO mode after fatal DMA errors Larry Finger
2010-02-26 19:13 ` Linus Torvalds
2010-02-26 20:06 ` Linus Torvalds [this message]
2010-02-26 20:09 ` Gábor Stefanik
2010-02-26 20:50 ` Linus Torvalds
2010-02-26 21:01 ` Larry Finger
2010-02-26 21:45 ` Linus Torvalds
2010-02-26 21:50 ` Linus Torvalds
2010-02-26 22:08 ` Gábor Stefanik
2010-02-26 22:46 ` Linus Torvalds
2010-02-26 22:54 ` Gábor Stefanik
2010-02-27 15:04 ` Michael Buesch
2010-02-27 14:59 ` Michael Buesch
2010-02-27 18:31 ` Linus Torvalds
2010-02-27 18:51 ` Michael Buesch
2010-02-26 19:59 ` Michael Buesch
2010-02-26 20:07 ` Linus Torvalds
2010-02-26 20:20 ` Michael Buesch
2010-02-26 20:33 ` Linus Torvalds
2010-02-26 20:42 ` Linus Torvalds
2010-02-27 14:44 ` Michael Buesch
2010-02-27 14:49 ` Michael Buesch
2010-02-27 17:36 ` Michael Buesch
2010-02-27 20:12 ` Nathan Schulte
2010-02-27 21:08 ` Linus Torvalds
2010-02-27 21:43 ` Michael Buesch
2010-02-27 22:12 ` Linus Torvalds
2010-02-26 20:46 Nathan Schulte
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