Re: [PATCH] pciehp: Add pciehp_surprise module option

From: Matthew Garrett
Date: Wed Mar 20 2013 - 13:53:23 EST

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@xxxxxxxxxxxxx
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