Subject: Re: 2.6.13-rc7-git2 crashes on iBook

From: Stelian Pop <[email-masked]>
Date: Mon, 29 Aug 2005 12:39:11 +0200

Le dimanche 28 août 2005 à 22:02 -0600, Alex Williamson a écrit :
> On Sun, 2005-08-28 at 13:20 +0200, Andreas Schwab wrote:
> > The last change to drivers/pci/setup-res.c (Ignore disabled ROM resources
> > at setup) is breaking radeonfb on iBook G3 (with Radeon Mobility M6 LY).
> > It crashes in pci_map_rom when called from radeonfb_map_ROM.  This is
> > probably a dormant bug that was just uncovered by the change.
> 
>    Same thing on Mac Mini.  2.6.13 doesn't boot.  Revert the
> drivers/pci/setup-res.c change from rc7-git2 and it seems ok.

Confirmed on an Apple Powerbook too.

For reference, the (already reverted) patch which needs to be applied is
below.

Signed-off-by: Stelian Pop <[email-masked]>

Index: linux-2.6.git/drivers/pci/setup-res.c
===================================================================
--- linux-2.6.git.orig/drivers/pci/setup-res.c	2005-08-29 10:03:00.000000000 +0200
+++ linux-2.6.git/drivers/pci/setup-res.c	2005-08-29 12:23:20.980716336 +0200
@@ -53,9 +53,7 @@
 	if (resno < 6) {
 		reg = PCI_BASE_ADDRESS_0 + 4 * resno;
 	} else if (resno == PCI_ROM_RESOURCE) {
-		if (!(res->flags & IORESOURCE_ROM_ENABLE))
-			return;
-		new |= PCI_ROM_ADDRESS_ENABLE;
+		new |= res->flags & IORESOURCE_ROM_ENABLE;
 		reg = dev->rom_base_reg;
 	} else {
 		/* Hmm, non-standard resource. */

Stelian.
-- 
Stelian Pop <[email-masked]>