From: Andrew Morton <akpm@zip.com.au>
To: David Woodhouse <dwmw2@infradead.org>
Cc: lkml <linux-kernel@vger.kernel.org>, David Hinds <dhinds@sonic.net>
Subject: Re: [patch] ip autoconfig for PCMCIA NICs
Date: Fri, 19 Oct 2001 15:33:30 -0700 [thread overview]
Message-ID: <3BD0AA3A.D3C61F0D@zip.com.au> (raw)
In-Reply-To: <3BD092A6.26A1CFE9@zip.com.au>, <3BD092A6.26A1CFE9@zip.com.au> <29471.1003530166@redhat.com>
David Woodhouse wrote:
>
> akpm@zip.com.au said:
> > Also, yenta_open() currently defers device initialisation to keventd,
> > so there is a good chance that cardbus init hasn't completed by the
> > time we hit ip autoconf, so the yenta_open_bh functionality is made
> > synchronous.
>
> That was async at Linus' request - if we register the irq early, some
> boards die in an interrupt storm. Linux is currently fairly crap at
> noticing and recovering from interrupt storms.
>
So any change in this area is untestable in the 2.4 context. Sigh.
But how can the current code prevent IRQ problems? AFAICT it just
delays the yenta_open_bh() operations by a short-but-random time
interval.
Should the IRQ be registered _after_ the call to cardbus_register()
when, presumably, the hardware is set up and has negated the IRQ
signal?
-
next prev parent reply other threads:[~2001-10-19 22:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-19 20:52 [patch] ip autoconfig for PCMCIA NICs Andrew Morton
2001-10-19 22:22 ` David Woodhouse
2001-10-19 22:33 ` Andrew Morton [this message]
2001-10-20 3:24 ` David Hinds
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