diff options
| author | Dave Jones <davej@redhat.com> | 2007-02-04 12:18:50 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-03-09 10:50:18 -0800 |
| commit | 33b440130f9965ad90f546a988e8cf1d3a3f3995 (patch) | |
| tree | b1b902fcbc345ba299e48569db79a76d745fc014 /drivers/char | |
| parent | 5678ae79fd4e8c1fbc48ef2e8587d2b1bf3032fa (diff) | |
AGP: intel-agp bugfix
On Sun, Feb 04, 2007 at 04:51:38PM +0100, Eric Piel wrote:
> Hello,
>
> I've got a regression in 2.6.20-rc7 (-rc6 was fine) due to commit
> 4b95320fc4d21b0ff2f8604305dd6c851aff6096 ([AGPGART] intel_agp: restore
> graphics device's pci space early in resume).
I think the key to this failure is the last line here ..
> agpgart-intel 0000:00:00.0: resuming
> PM: Writing back config space on device 0000:00:02.0 at offset f (was 10b, writing 0)
> PM: Writing back config space on device 0000:00:02.0 at offset d (was dc, writing 0)
> PM: Writing back config space on device 0000:00:02.0 at offset b (was 10161025, writing 0)
> PM: Writing back config space on device 0000:00:02.0 at offset 5 (was f4000000, writing 0)
> PM: Writing back config space on device 0000:00:02.0 at offset 4 (was f8000008, writing 0)
> PM: Writing back config space on device 0000:00:02.0 at offset 2 (was 3000011, writing 0)
> PM: Writing back config space on device 0000:00:02.0 at offset 1 (was 2b00007, writing 0)
> PM: Writing back config space on device 0000:00:02.0 at offset 0 (was 11328086, writing 0)
> agpgart: Unable to remap memory.
This then blows up the next access to intel_i810_private.registers, which happens to
be intel_i810_insert_entries.
Either we need .suspend methods which unmap these regions, or we need
to skip trying to map them a second time on resume.
There's an ugly patch below which does the latter. Give it a try?
The intel-agp suspend/resume code has really grown into something
of a monster, and could use some refactoring in a big way.
Dave
From: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/agp/intel-agp.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c index a3011de51f7..84787ce5f72 100644 --- a/drivers/char/agp/intel-agp.c +++ b/drivers/char/agp/intel-agp.c @@ -117,13 +117,15 @@ static int intel_i810_configure(void) current_size = A_SIZE_FIX(agp_bridge->current_size); - pci_read_config_dword(intel_i810_private.i810_dev, I810_MMADDR, &temp); - temp &= 0xfff80000; - - intel_i810_private.registers = ioremap(temp, 128 * 4096); if (!intel_i810_private.registers) { - printk(KERN_ERR PFX "Unable to remap memory.\n"); - return -ENOMEM; + pci_read_config_dword(intel_i810_private.i810_dev, I810_MMADDR, &temp); + temp &= 0xfff80000; + + intel_i810_private.registers = ioremap(temp, 128 * 4096); + if (!intel_i810_private.registers) { + printk(KERN_ERR PFX "Unable to remap memory.\n"); + return -ENOMEM; + } } if ((readl(intel_i810_private.registers+I810_DRAM_CTL) |