From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Lukas Wunner <lukas@wunner.de>,
linux-pci@vger.kernel.org, linux-wireless@vger.kernel.org,
zajec5@gmail.com, b43-dev@lists.infradead.org
Subject: [PATCH] PCI: Add Broadcom 4331 reset quirk to prevent IRQ storm
Date: Tue, 5 Apr 2016 20:59:46 +0100 [thread overview]
Message-ID: <20160405195946.GA18194@srcf.ucam.org> (raw)
In-Reply-To: <20160405194015.GC15353@localhost>
On Tue, Apr 05, 2016 at 02:40:15PM -0500, Bjorn Helgaas wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=111781 and
> https://mjg59.dreamwidth.org/11235.html describe a sort of similar
> issue, but with DMA. An interrupt from the device is probably to
> signal a DMA completion, but these problem reports only mention the
> "IRQ nobody cared" issue; I don't see anything about memory
> corruption.
I "fixed" this with
https://github.com/mjg59/grub-fedora/commit/21fcd6d79b7601e4b20ad70c5408adff2dabbc1d
- doing the same in the kernel EFI stub would probably be the best way
to handle it. This way you're guaranteed to stop DMA before the kernel
reclaims boot services memory, which guarantees you won't have any
corruption.
--
Matthew Garrett | mjg59 at srcf.ucam.org
next prev parent reply other threads:[~2016-04-05 19:59 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <811539524df8b5ed7e2817c1c3e3e08560c97964.1459275517.git.lukas@wunner.de>
2016-03-31 18:51 ` [PATCH] PCI: Add Broadcom 4331 reset quirk to prevent IRQ storm Rafał Miłecki
2016-04-05 19:40 ` Bjorn Helgaas
2016-04-05 19:49 ` Michael Büsch
2016-04-06 13:31 ` Bjorn Helgaas
2016-04-06 15:17 ` Michael Büsch
2016-04-06 21:36 ` Lukas Wunner
2016-04-05 19:59 ` Matthew Garrett [this message]
2016-04-06 11:28 ` Andrew Worsley
2016-04-06 21:30 ` Lukas Wunner
2016-04-06 22:19 ` Matthew Garrett
2016-04-09 12:00 ` Matt Fleming
2016-04-24 16:58 ` Lukas Wunner
[not found] <E1akxli-00030z-BC@bombadil.infradead.org>
2016-03-31 23:13 ` Chris Bainbridge
2016-04-01 4:59 ` Michael Büsch
2016-04-01 22:46 ` Lukas Wunner
2016-04-02 7:30 ` Michael Büsch
2016-04-02 11:40 ` Andrew Worsley
2016-04-03 11:49 ` Lukas Wunner
2016-04-07 12:04 ` Andrew Worsley
2016-04-10 10:09 ` Andrew Worsley
2016-04-12 18:32 ` Lukas Wunner
2016-04-13 20:42 ` Andrew Worsley
2016-04-24 17:04 ` Lukas Wunner
2016-05-23 14:42 ` Lukas Wunner
2016-05-24 23:38 ` Chris Bainbridge
[not found] <E1akxli-00030z-Jz@bombadil.infradead.org>
2016-03-29 17:46 ` Lukas Wunner
2016-03-31 19:09 ` Michael Büsch
2016-03-29 17:41 Lukas Wunner
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