PCI: Change all drivers to use pci_device->revision

Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.

This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.

In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.

Compile tested with make all{yes,mod}config on x86_64 and i386.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 6 deletions

diff --git a/arch/i386/pci/fixup.c b/arch/i386/pci/fixup.c
index b95b42950ed4..e7306dbf6c42 100644
--- a/arch/i386/pci/fixup.c
+++ b/arch/i386/pci/fixup.c
@@ -118,12 +118,9 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci
 static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
 {
         u8 v;
-        u8 revision;
         int where = 0x55;
         int mask = 0x1f; /* clear bits 5, 6, 7 by default */
 
-        pci_read_config_byte(d, PCI_REVISION_ID, &revision);
-
         if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
                 /* fix pci bus latency issues resulted by NB bios error
                    it appears on bug free^Wreduced kt266x's bios forces
@@ -133,8 +130,8 @@ static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
                 where = 0x95; /* the memory write queue timer register is 
                                 different for the KT266x's: 0x95 not 0x55 */
         } else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
-                        (revision == VIA_8363_KL133_REVISION_ID || 
-                        revision == VIA_8363_KM133_REVISION_ID)) {
+                        (d->revision == VIA_8363_KL133_REVISION_ID ||
+                        d->revision == VIA_8363_KM133_REVISION_ID)) {
                         mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
                                         causes screen corruption on the KL133/KM133 */
         }
@@ -142,7 +139,7 @@ static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
         pci_read_config_byte(d, where, &v);
         if (v & ~mask) {
                 printk(KERN_WARNING "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
-                        d->device, revision, where, v, mask, v & mask);
+                        d->device, d->revision, where, v, mask, v & mask);
                 v &= mask;
                 pci_write_config_byte(d, where, v);
         }