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authorAuke Kok <auke-jan.h.kok@intel.com>2007-06-08 15:46:36 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-11 16:02:10 -0700
commit44c10138fd4bbc4b6d6bff0873c24902f2a9da65 (patch)
tree6e16d3ec80c87490dc743f72da086356f2906ace /drivers/pci/quirks.c
parentb8a3a5214d7cc115f1ca3a3967b7229d97c46f4a (diff)
downloadop-kernel-dev-44c10138fd4bbc4b6d6bff0873c24902f2a9da65.zip
op-kernel-dev-44c10138fd4bbc4b6d6bff0873c24902f2a9da65.tar.gz
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>
Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 75bd6a8..f75ade6 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -587,10 +587,7 @@ DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, quirk_via_v
*/
static void __devinit quirk_amd_ioapic(struct pci_dev *dev)
{
- u8 rev;
-
- pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
- if (rev >= 0x02) {
+ if (dev->revision >= 0x02) {
printk(KERN_WARNING "I/O APIC: AMD Erratum #22 may be present. In the event of instability try\n");
printk(KERN_WARNING " : booting with the \"noapic\" option.\n");
}
@@ -610,13 +607,12 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_ANY_ID, quirk_ioapic_rmw );
#define AMD8131_NIOAMODE_BIT 0
static void quirk_amd_8131_ioapic(struct pci_dev *dev)
{
- unsigned char revid, tmp;
+ unsigned char tmp;
if (nr_ioapics == 0)
return;
- pci_read_config_byte(dev, PCI_REVISION_ID, &revid);
- if (revid == AMD8131_revA0 || revid == AMD8131_revB0) {
+ if (dev->revision == AMD8131_revA0 || dev->revision == AMD8131_revB0) {
printk(KERN_INFO "Fixing up AMD8131 IOAPIC mode\n");
pci_read_config_byte( dev, AMD8131_MISC, &tmp);
tmp &= ~(1 << AMD8131_NIOAMODE_BIT);
@@ -859,10 +855,8 @@ DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, qu
static void quirk_disable_pxb(struct pci_dev *pdev)
{
u16 config;
- u8 rev;
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
- if (rev != 0x04) /* Only C0 requires this */
+ if (pdev->revision != 0x04) /* Only C0 requires this */
return;
pci_read_config_word(pdev, 0x40, &config);
if (config & (1<<6)) {
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