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Date: Wed, 12 Jul 2006 19:27:59 -0700
From: Sam Leffler <sam@errno.com>
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To: Nate Lawson <nate@root.org>
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Cc: current <current@freebsd.org>
Subject: Re: cbb hangs during suspend if ath card active
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Sam Leffler wrote:

> A more likely scenario is that ath_stop is putting the card into "deep
> sleep".  At that point you cannot touch any of the PCI domain registers
> for the card w/o bringing it out of sleep.  If you do then the
> pci/cardbus will hang.  Ejecting the card removes the device from the
> bus and allows things to continue.

Sorry, that should've been "you cannot touch anything but the PCI domain
registers"...  Basically you can't touch any registers except PCI config
space registers and/or those reg's used to bring the chip out of sleep.

	Sam