linux-kernel - Re: [BUG] agpgart-amd64 not initialized in 2.6.33-rc5 if iommu=allowed in kernel command line

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 3 Feb 2010 00:49:20 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	mitov@...p.bas.bg
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, davej@...hat.com,
	fujita.tomonori@....ntt.co.jp
Subject: Re: [BUG] agpgart-amd64 not initialized in 2.6.33-rc5 if
 iommu=allowed in kernel command line

On Tue, 2 Feb 2010 20:23:40 +0900
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> wrote:

> > If CONFIG_AGP_AMD64=m  it works (I have agp)  with no kernel command
> > line parameters. If I boot to no graphics (runlevel 3 in slackware), 
> > lsmod output is:
> > 
> > amd64_agp               7463  1
> > agpgart                   27765  1 amd64_agp
> > 
> > amd64_agp is in use (not known by who), cannot be unloaded and I cannot 
> > test load/unload.
> > 
> > If CONFIG_AGP_AMD64=m and  iommu=allowed is in kernel command line
> > I have no agp.
> > dmesg:
> > [drm:mga_do_agp_dma_bootstrap] *ERROR* Unable to acquire AGP: -19
> 
> This works with 2.6.32, right?  The following patch works?

Duh, sorry, please this instead:

diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index 34cf04e..fd50ead 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -767,16 +767,19 @@ int __init agp_amd64_init(void)
 
 static int __init agp_amd64_mod_init(void)
 {
+#ifndef MODULE
 	if (gart_iommu_aperture)
 		return agp_bridges_found ? 0 : -ENODEV;
-
+#endif
 	return agp_amd64_init();
 }
 
 static void __exit agp_amd64_cleanup(void)
 {
+#ifndef MODULE
 	if (gart_iommu_aperture)
 		return;
+#endif
 	if (aperture_resource)
 		release_resource(aperture_resource);
 	pci_unregister_driver(&agp_amd64_pci_driver);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/