From: Grant Grundler <grundler@dsl2.external.hp.com>
To: Matthew Wilcox <willy@debian.org>
Cc: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] rp2470 hang...getting closer
Date: Sun, 20 Oct 2002 21:33:54 -0600 [thread overview]
Message-ID: <20021021033354.9C50E4829@dsl2.external.hp.com> (raw)
In-Reply-To: Message from Matthew Wilcox <willy@debian.org> of "Mon, 21 Oct 2002 03:21:13 BST." <20021021032113.G5285@parcelfarce.linux.theplanet.co.uk>
Matthew Wilcox wrote:
> hmm.. not sure about disable_irq() -- certainly sti() is gone and __sti()
> is local_irq_disable() in 2.5; but i think enable/disable_irq still act
> globally. i think this is because it's supposed to go and enable/disable
> delivery of interrupts in the (io)(s)(a)pic, rather than playing with
> the cpu interrupt masks.
Normally, disable_irq() will only result in the IRQ being disabled
at the PIC. ie if a regular PCI driver calls disable_irq().
But if HP device (eg Dino/IOSAPIC) calls disable_irq(), the IRQ
is in the CPU region and we muck with EIEM.
grant
next prev parent reply other threads:[~2002-10-21 3:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-13 4:40 [parisc-linux] rp2470 hang...getting closer Grant Grundler
2002-10-13 13:56 ` Thibaut VARENE
2002-10-21 0:57 ` Grant Grundler
2002-10-21 2:21 ` Matthew Wilcox
2002-10-21 3:33 ` Grant Grundler [this message]
2002-10-21 14:59 ` Matthew Wilcox
2002-10-21 15:26 ` Matthew Wilcox
2002-10-21 21:58 ` Grant Grundler
-- strict thread matches above, loose matches on Subject: below --
2002-10-22 0:41 John Marvin
2002-10-23 1:19 ` Grant Grundler
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