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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/char
parentb8a3a5214d7cc115f1ca3a3967b7229d97c46f4a (diff)
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/char')
-rw-r--r--drivers/char/agp/amd-k7-agp.c4
-rw-r--r--drivers/char/agp/amd64-agp.c6
2 files changed, 3 insertions, 7 deletions
diff --git a/drivers/char/agp/amd-k7-agp.c b/drivers/char/agp/amd-k7-agp.c
index e6c534e6284..df0ddf14b85 100644
--- a/drivers/char/agp/amd-k7-agp.c
+++ b/drivers/char/agp/amd-k7-agp.c
@@ -462,9 +462,7 @@ static int __devinit agp_amdk7_probe(struct pci_dev *pdev,
* erratum 46: Setup violation on AGP SBA pins - Disable side band addressing.
* With this lot disabled, we should prevent lockups. */
if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_700E) {
- u8 revision=0;
- pci_read_config_byte(pdev, PCI_REVISION_ID, &revision);
- if (revision == 0x10 || revision == 0x11) {
+ if (pdev->revision == 0x10 || pdev->revision == 0x11) {
agp_bridge->flags = AGP_ERRATA_FASTWRITES;
agp_bridge->flags |= AGP_ERRATA_SBA;
agp_bridge->flags |= AGP_ERRATA_1X;
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index 801abdd2906..d95662e9632 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -367,10 +367,8 @@ static __devinit int cache_nbs (struct pci_dev *pdev, u32 cap_ptr)
static void __devinit amd8151_init(struct pci_dev *pdev, struct agp_bridge_data *bridge)
{
char *revstring;
- u8 rev_id;
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
- switch (rev_id) {
+ switch (pdev->revision) {
case 0x01: revstring="A0"; break;
case 0x02: revstring="A1"; break;
case 0x11: revstring="B0"; break;
@@ -386,7 +384,7 @@ static void __devinit amd8151_init(struct pci_dev *pdev, struct agp_bridge_data
* Work around errata.
* Chips before B2 stepping incorrectly reporting v3.5
*/
- if (rev_id < 0x13) {
+ if (pdev->revision < 0x13) {
printk (KERN_INFO PFX "Correcting AGP revision (reports 3.5, is really 3.0)\n");
bridge->major_version = 3;
bridge->minor_version = 0;