The patch titled
Improve PCI config space writeback.
has been removed from the -mm tree. Its filename is
improve-pci-config-space-writeback.patch
This patch was probably dropped from -mm because
it has now been merged into a subsystem tree or
into Linus's tree, or because it was folded into
its parent patch in the -mm tree.
------------------------------------------------------
Subject: Improve PCI config space writeback.
From: Dave Jones <davej@xxxxxxxxxx>
At least one laptop blew up on resume from suspend with a black screen due
to a lack of this patch. By only writing back config space that is
different, we minimise the possibility of accidents like this.
Signed-off-by: Dave Jones <davej@xxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/pci/pci.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
diff -puN drivers/pci/pci.c~improve-pci-config-space-writeback drivers/pci/pci.c
--- devel/drivers/pci/pci.c~improve-pci-config-space-writeback 2006-04-18 21:06:15.000000000 -0700
+++ devel-akpm/drivers/pci/pci.c 2006-04-18 21:06:17.000000000 -0700
@@ -461,9 +461,19 @@ int
pci_restore_state(struct pci_dev *dev)
{
int i;
+ int val;
- for (i = 0; i < 16; i++)
- pci_write_config_dword(dev,i * 4, dev->saved_config_space[i]);
+ for (i = 0; i < 16; i++) {
+ pci_read_config_dword(dev, i * 4, &val);
+ if (val != dev->saved_config_space[i]) {
+ printk(KERN_DEBUG "PM: Writing back config space on "
+ "device %s at offset %x (was %x, writing %x)\n",
+ pci_name(dev), i,
+ val, (int)dev->saved_config_space[i]);
+ pci_write_config_dword(dev,i * 4,
+ dev->saved_config_space[i]);
+ }
+ }
pci_restore_msi_state(dev);
pci_restore_msix_state(dev);
return 0;
_
Patches currently in -mm which might be from davej@xxxxxxxxxx are
origin.patch
git-acpi.patch
git-agpgart.patch
git-cpufreq.patch
remove-silly-messages-from-input-layer.patch
fix-ide-locking-error.patch
post-halloween-doc.patch
debug-warn-if-we-sleep-in-an-irq-for-a-long-time.patch
-
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