Messages in this thread | | | Date | Wed, 20 Mar 2013 17:52:34 +0000 | From | Matthew Garrett <> | Subject | Re: [PATCH] pciehp: Add pciehp_surprise module option |
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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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