On Sun, Jul 31, 2005 at 08:36:53PM +0100, Ralf Baechle wrote: > On Wed, Jul 27, 2005 at 10:19:44AM -0400, John W. Linville wrote: > > > Some PCI devices (e.g. 3c905B, 3c556B) lose all configuration > > (including BARs) when transitioning from D3hot->D0. This leaves such > > a device in an inaccessible state. The patch below causes the BARs > > to be restored when enabling such a device, so that its driver will > > be able to access it. > > > > The patch also adds pci_restore_bars as a new global symbol, and adds a > > correpsonding EXPORT_SYMBOL_GPL for that. > > > > Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx> > > --- > > Some firmware (e.g. Thinkpad T21) leaves devices in D3hot after a > > (re)boot. Most drivers call pci_enable_device very early, so devices > > left in D3hot that lose configuration during the D3hot->D0 transition > > will be inaccessible to their drivers. > > Tested with the 3com 3c556B Hurricane mini-PCI card in the IBM A21P. Without > this patch the 3c59x driver has not been able to read the MAC address of > the card's EEPROM with ACPI enabled, now it works with and without ACPI > support. This patch should settle at least some of the issues in > http://bugzilla.kernel.org/show_bug.cgi?id=1188. Thanks for testing. I'm still going to hold off sending this in for 2.6.13 and wait for 2.6.14, unless people really think it should go in now. greg k-h
