From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Takashi Iwai <tiwai@suse.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
Oliver Neukum <oneukum@suse.de>, Michal Marek <mmarek@suse.cz>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] pciehp: Add pciehp_surprise module option
Date: Wed, 20 Mar 2013 17:52:34 +0000 [thread overview]
Message-ID: <20130320175234.GA8948@srcf.ucam.org> (raw)
In-Reply-To: <s5h38vqjhk6.wl%tiwai@suse.de>
On Wed, Mar 20, 2013 at 03:02:01PM +0100, Takashi Iwai wrote:
> We encountered a problem that on some HP machines the Realtek PCI-e
> card reader device appears only when you inserted a card before the
> cold boot. While debugging, it turned out that the device is actually
> handled via PCI-e hotplug in some level. The device sends a presence
> change notification, and pciehp receives it, but it's ignored because
> of lack of the hotplug surprise (PCI_EXP_SLTCAP_HPS) capability bit.
> Once when this check passes, everything starts working -- the device
> appears upon plugging the card properly.
Well that just sounds like a bug. What's the downside to just ignoring
that capability bit?
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2013-03-20 17:53 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-20 14:02 [PATCH] pciehp: Add pciehp_surprise module option Takashi Iwai
2013-03-20 16:33 ` Randy Dunlap
2013-03-20 16:39 ` Takashi Iwai
2013-03-20 17:52 ` Matthew Garrett [this message]
2013-03-20 19:11 ` Takashi Iwai
2013-03-20 19:12 ` Matthew Garrett
2013-03-20 19:23 ` Takashi Iwai
2013-03-20 19:26 ` Matthew Garrett
2013-03-20 18:09 ` Alex Williamson
2013-03-20 19:08 ` Takashi Iwai
2013-03-22 16:15 ` Michal Marek
2013-03-22 16:16 ` Matthew Garrett
2013-03-22 16:35 ` Michal Marek
2013-03-22 16:20 ` Alex Williamson
2013-03-27 16:11 ` Oliver Neukum
2013-03-27 16:19 ` Michal Marek
2013-03-20 18:41 ` Martin Mokrejs
2013-03-20 18:56 ` Martin Mokrejs
2013-03-20 19:20 ` Takashi Iwai
2013-06-07 0:04 ` Martin Mokrejs
2013-03-25 16:58 ` Bjorn Helgaas
2013-04-10 16:34 ` Takashi Iwai
2013-04-10 17:19 ` Bjorn Helgaas
2013-04-11 13:40 ` Takashi Iwai
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