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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/ata/ata_piix.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/ata/ata_piix.c')
-rw-r--r--drivers/ata/ata_piix.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 6a3bfef..2610db7 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -928,20 +928,18 @@ static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev)
{
struct pci_dev *pdev = NULL;
u16 cfg;
- u8 rev;
int no_piix_dma = 0;
while((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL)
{
/* Look for 450NX PXB. Check for problem configurations
A PCI quirk checks bit 6 already */
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
pci_read_config_word(pdev, 0x41, &cfg);
/* Only on the original revision: IDE DMA can hang */
- if (rev == 0x00)
+ if (pdev->revision == 0x00)
no_piix_dma = 1;
/* On all revisions below 5 PXB bus lock must be disabled for IDE */
- else if (cfg & (1<<14) && rev < 5)
+ else if (cfg & (1<<14) && pdev->revision < 5)
no_piix_dma = 2;
}
if (no_piix_dma)
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