Re: Linux 3.7-rc1 (nouveau_bios_score oops).

From: Marcin Slusarz <marcin.slusarz@gmail.com>
To: Heinz Diehl <htd@fritha.org>
Cc: "Martin Peres" <martin.peres@labri.fr>,
	"Heinz Diehl" <htd@fancy-poultry.org>,
	"Linus Torvalds" <torvalds@linux-foundation.org>,
	"Paweł Sikora" <pawel.sikora@agmk.net>,
	"David Airlie" <airlied@linux.ie>,
	"Ben Skeggs" <bskeggs@redhat.com>,
	"Daniel Vetter" <daniel.vetter@ffwll.ch>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	marcheu@chromium.org
Subject: Re: Linux 3.7-rc1 (nouveau_bios_score oops).
Date: Sun, 21 Oct 2012 00:19:48 +0200	[thread overview]
Message-ID: <20121020221948.GE5826@joi.lan> (raw)
In-Reply-To: <20121020212036.GA1698@fritha.org>

On Sat, Oct 20, 2012 at 11:20:36PM +0200, Heinz Diehl wrote:
> On 20.10.2012, Marcin Slusarz wrote: 
> 
> > Try this one.
> 
> It works, now I can boot again. However, nouveau seems to be dead now.
> The dmesg output with your patch on top of 3.7-rc1 is:
> 
> [    3.685909] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
> [    3.687784] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0a8800b1
> [    3.689960] nouveau  [  DEVICE][0000:01:00.0] Chipset: GT218 (NVA8)
> [    3.692471] nouveau  [  DEVICE][0000:01:00.0] Family : NV50
> [    3.695716] nouveau  [   VBIOS][0000:01:00.0] checking PRAMIN for image...
> [    3.697087] nouveau  [   VBIOS][0000:01:00.0] ... signature not found
> [    3.698471] nouveau  [   VBIOS][0000:01:00.0] checking PROM for image...
> [    3.699838] nouveau  [   VBIOS][0000:01:00.0] ... signature not found
> [    3.701223] nouveau  [   VBIOS][0000:01:00.0] checking ACPI for image...
> [    3.702684] ACPI Error: Field [ROMI] Base+Offset+Width 0+24+1 is beyond end of region [VROM] (length 24) (20120913/exfldio-210)
> [    3.704139] ACPI Error: Method parse/execution failed[\_SB_.PCI0.PEG1.GFX0._ROM] (Node ffff880142e85cf8), AE_AML_REGION_LIMIT (20120913/psparse-536)
> [    3.716183] failed to evaluate ROM got AE_AML_REGION_LIMIT
> [    3.718776] nouveau  [   VBIOS][0000:01:00.0] ... signature not found
> [    3.721349] nouveau  [   VBIOS][0000:01:00.0] checking PCIROM for image...
> [    3.724111] nouveau 0000:01:00.0: Invalid ROM contents
> [    3.726663] nouveau  [   VBIOS][0000:01:00.0] ... signature not found
> [    3.729159] nouveau E[   VBIOS][0000:01:00.0] unable to locate usable image
> [    3.731677] nouveau E[  DEVICE][0000:01:00.0] failed to create 0x10000001, -22
> [    3.734231] nouveau E[     DRM] failed to create 0x80000080, -22
> [    3.736097] nouveau: probe of 0000:01:00.0 failed with error -22
> [    3.740523] dracut: Starting plymouth daemon

Hmm, maybe we can't fetch 3 bytes only...

Let's check this:

---

diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
index 824eea0..8bd71aa 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
@@ -192,14 +192,16 @@ nouveau_bios_shadow_acpi(struct nouveau_bios *bios)
 {
 	struct pci_dev *pdev = nv_device(bios)->pdev;
 	int ret, cnt, i;
-	u8  data[3];
+	u8  *data;
 
 	if (!nouveau_acpi_rom_supported(pdev))
 		return;
 
 	bios->size = 0;
-	if (nouveau_acpi_get_bios_chunk(data, 0, 3) == 3)
+	data = kmalloc(4096, GFP_KERNEL);
+	if (data && nouveau_acpi_get_bios_chunk(data, 0, 4096) >= 3)
 		bios->size = data[2] * 512;
+	kfree(data);
 	if (!bios->size)
 		return;
 
---

Please attach acpidump output.
