[PATCH 2.6] Fix off-by-one in pci_enable_wake

[Roger Luethi]

Fix off-by-one in pci_enable_wake.
Bit field location determined by mask, not value.

Signed-off-by: Roger Luethi <rl@xxxxxxxxxxx>

--- linux-2.6.7-rc3-bk6/drivers/pci/pci.c.orig	2004-06-14 18:42:09.561442345 +0200
+++ linux-2.6.7-rc3-bk6/drivers/pci/pci.c	2004-06-14 18:43:15.083670484 +0200
@@ -442,7 +442,7 @@
 	pci_read_config_word(dev,pm+PCI_PM_PMC,&value);
 
 	value &= PCI_PM_CAP_PME_MASK;
-	value >>= ffs(value);   /* First bit of mask */
+	value >>= ffs(PCI_PM_CAP_PME_MASK) - 1;   /* First bit of mask */
 
 	/* Check if it can generate PME# from requested state. */
 	if (!value || !(value & (1 << state))) 
-
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