lkml.org 
[lkml]   [2003]   [Mar]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: PCI hotplug question.
On Tue, Mar 04, 2003 at 10:15:20PM -0800, Greg KH wrote:
> I can't find my copy of the PCI Hotplug spec right now (and it's not
> free for download anymore...), but I think that once a user presses the
> latch button, the OS _has_ to power down that slot within a reasonable
> amount of time. So there's no way that a driver could return an error
> to the remove() callback and have a chance to still be around in a
> moment or so. And some systems (ACPI controlled PCI Hotplug), we don't
> have a choice, as the BIOS is about to do the powerdown anyway, and we
> can't stop it.

Not only that, but with Cardbus-based PCI expansion systems, a complete
PCI bus tree could have been removed and be gone before the drivers get
notified, if the user pulls the cardbus card from the slot.

--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [W:0.032 / U:0.480 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site