Subject: Re: Possible fix for kern/10586: wake up from power state D3
To: None <email@example.com>
From: Matthias Scheler <firstname.lastname@example.org>
Date: 07/16/2000 17:38:33
In article <20000716102838.H714@dr-evil.z.zembu.com>,
Jason R Thorpe <email@example.com> writes:
> > + reg |= PCI_COMMAND_IO_ENABLE |
> > + PCI_COMMAND_MEM_ENABLE |
> > + PCI_COMMAND_MASTER_ENABLE;
> This is not correct. MASTER should be enabled, but each of IO and MEM
> should be enabled iff its corresponding BAR has a valid value programmed
> into it, and if pa->pa_flags has the corresponding flag set.
Well, that is exactly the reason why the card is not working after being
in power state D3: IO and MEM are disabled. To make it up it must be
enabled. And writing to PCI_COMMAND_STATUS_REG seems to do that.
> > + pa->pa_flags |= PCI_FLAGS_IO_ENABLED |
> > + PCI_FLAGS_MEM_ENABLED;
> You should *never* modify pa->pa_flags;
What should be done else? Somehow the system must be told that IO
and MEM have been enabled.
Matthias Scheler http://www.sighardstrasse.de/~tron/