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Date: Wed, 20 Mar 2013 17:52:34 +0000
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
Message-ID: <20130320175234.GA8948@srcf.ucam.org>
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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
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