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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/ide/pci/serverworks.c
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/ide/pci/serverworks.c')
-rw-r--r--drivers/ide/pci/serverworks.c13
1 files changed, 3 insertions, 10 deletions
diff --git a/drivers/ide/pci/serverworks.c b/drivers/ide/pci/serverworks.c
index 1371b5bf6bf0..ed04e0c8dd4c 100644
--- a/drivers/ide/pci/serverworks.c
+++ b/drivers/ide/pci/serverworks.c
@@ -55,7 +55,6 @@ static const char *svwks_bad_ata100[] = {
NULL
};
-static u8 svwks_revision = 0;
static struct pci_dev *isa_dev;
static int check_in_drive_lists (ide_drive_t *drive, const char **list)
@@ -71,9 +70,6 @@ static u8 svwks_udma_filter(ide_drive_t *drive)
struct pci_dev *dev = HWIF(drive)->pci_dev;
u8 mask = 0;
- if (!svwks_revision)
- pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);
-
if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
return 0x1f;
if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
@@ -88,9 +84,9 @@ static u8 svwks_udma_filter(ide_drive_t *drive)
return 0;
/* Check the OSB4 DMA33 enable bit */
return ((reg & 0x00004000) == 0x00004000) ? 0x07 : 0;
- } else if (svwks_revision < SVWKS_CSB5_REVISION_NEW) {
+ } else if (dev->revision < SVWKS_CSB5_REVISION_NEW) {
return 0x07;
- } else if (svwks_revision >= SVWKS_CSB5_REVISION_NEW) {
+ } else if (dev->revision >= SVWKS_CSB5_REVISION_NEW) {
u8 btr = 0, mode;
pci_read_config_byte(dev, 0x5A, &btr);
mode = btr & 0x3;
@@ -234,9 +230,6 @@ static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const cha
unsigned int reg;
u8 btr;
- /* save revision id to determine DMA capability */
- pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);
-
/* force Master Latency Timer value to 64 PCICLKs */
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
@@ -315,7 +308,7 @@ static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const cha
if (!(PCI_FUNC(dev->devfn) & 1))
btr |= 0x2;
else
- btr |= (svwks_revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
+ btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
pci_write_config_byte(dev, 0x5A, btr);
}
/* Setup HT1000 SouthBridge Controller - Single Channel Only */