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>
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 @@
{
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)
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 30c4276..0104367 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -455,23 +455,21 @@
static void ali_init_chipset(struct pci_dev *pdev)
{
- u8 rev, tmp;
+ u8 tmp;
struct pci_dev *north, *isa_bridge;
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
-
/*
* The chipset revision selects the driver operations and
* mode data.
*/
- if (rev >= 0x20 && rev < 0xC2) {
+ if (pdev->revision >= 0x20 && pdev->revision < 0xC2) {
/* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
pci_read_config_byte(pdev, 0x4B, &tmp);
/* Clear CD-ROM DMA write bit */
tmp &= 0x7F;
pci_write_config_byte(pdev, 0x4B, tmp);
- } else if (rev >= 0xC2) {
+ } else if (pdev->revision >= 0xC2) {
/* Enable cable detection logic */
pci_read_config_byte(pdev, 0x4B, &tmp);
pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
@@ -483,21 +481,21 @@
/* Configure the ALi bridge logic. For non ALi rely on BIOS.
Set the south bridge enable bit */
pci_read_config_byte(isa_bridge, 0x79, &tmp);
- if (rev == 0xC2)
+ if (pdev->revision == 0xC2)
pci_write_config_byte(isa_bridge, 0x79, tmp | 0x04);
- else if (rev > 0xC2 && rev < 0xC5)
+ else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02);
}
- if (rev >= 0x20) {
+ if (pdev->revision >= 0x20) {
/*
* CD_ROM DMA on (0x53 bit 0). Enable this even if we want
* to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
* via 0x54/55.
*/
pci_read_config_byte(pdev, 0x53, &tmp);
- if (rev <= 0x20)
+ if (pdev->revision <= 0x20)
tmp &= ~0x02;
- if (rev >= 0xc7)
+ if (pdev->revision >= 0xc7)
tmp |= 0x03;
else
tmp |= 0x01; /* CD_ROM enable for DMA */
@@ -579,25 +577,23 @@
};
const struct ata_port_info *ppi[] = { NULL, NULL };
- u8 rev, tmp;
+ u8 tmp;
struct pci_dev *isa_bridge;
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
-
/*
* The chipset revision selects the driver operations and
* mode data.
*/
- if (rev < 0x20) {
+ if (pdev->revision < 0x20) {
ppi[0] = &info_early;
- } else if (rev < 0xC2) {
+ } else if (pdev->revision < 0xC2) {
ppi[0] = &info_20;
- } else if (rev == 0xC2) {
+ } else if (pdev->revision == 0xC2) {
ppi[0] = &info_c2;
- } else if (rev == 0xC3) {
+ } else if (pdev->revision == 0xC3) {
ppi[0] = &info_c3;
- } else if (rev == 0xC4) {
+ } else if (pdev->revision == 0xC4) {
ppi[0] = &info_c4;
} else
ppi[0] = &info_c5;
@@ -605,7 +601,7 @@
ali_init_chipset(pdev);
isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
- if (isa_bridge && rev >= 0x20 && rev < 0xC2) {
+ if (isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
/* Are we paired with a UDMA capable chip */
pci_read_config_byte(isa_bridge, 0x5E, &tmp);
if ((tmp & 0x1E) == 0x12)
diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index b9c44c5..b09faca 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -623,17 +623,15 @@
const struct ata_port_info *ppi[] = { NULL, NULL };
static int printed_version;
int type = id->driver_data;
- u8 rev;
u8 fifo;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
pci_read_config_byte(pdev, 0x41, &fifo);
/* Check for AMD7409 without swdma errata and if found adjust type */
- if (type == 1 && rev > 0x7)
+ if (type == 1 && pdev->revision > 0x7)
type = 2;
/* Check for AMD7411 */
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index b67bbf6..430673b 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -587,8 +587,7 @@
itdev->want[1][1] = ATA_ANY;
itdev->last_device = -1;
- pci_read_config_byte(pdev, PCI_REVISION_ID, &conf);
- if (conf == 0x10) {
+ if (pdev->revision == 0x11) {
itdev->timing10 = 1;
/* Need to disable ATAPI DMA for this case */
if (!itdev->smart)
diff --git a/drivers/ata/pata_serverworks.c b/drivers/ata/pata_serverworks.c
index 0231aba..8969154 100644
--- a/drivers/ata/pata_serverworks.c
+++ b/drivers/ata/pata_serverworks.c
@@ -410,11 +410,8 @@
static int serverworks_fixup_csb(struct pci_dev *pdev)
{
- u8 rev;
u8 btr;
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
-
/* Third Channel Test */
if (!(PCI_FUNC(pdev->devfn) & 1)) {
struct pci_dev * findev = NULL;
@@ -456,7 +453,7 @@
if (!(PCI_FUNC(pdev->devfn) & 1))
btr |= 0x2;
else
- btr |= (rev >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
+ btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
pci_write_config_byte(pdev, 0x5A, btr);
return btr;
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 2b45082..74a0211 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -928,9 +928,7 @@
if (host != NULL) {
chipset = sets; /* Match found */
if (sets->device == 0x630) { /* SIS630 */
- u8 host_rev;
- pci_read_config_byte(host, PCI_REVISION_ID, &host_rev);
- if (host_rev >= 0x30) /* 630 ET */
+ if (host->revision >= 0x30) /* 630 ET */
chipset = &sis100_early;
}
break;
@@ -974,7 +972,6 @@
u16 trueid;
u8 prefctl;
u8 idecfg;
- u8 sbrev;
/* Try the second unmasking technique */
pci_read_config_byte(pdev, 0x4a, &idecfg);
@@ -987,11 +984,10 @@
lpc_bridge = pci_get_slot(pdev->bus, 0x10); /* Bus 0 Dev 2 Fn 0 */
if (lpc_bridge == NULL)
break;
- pci_read_config_byte(lpc_bridge, PCI_REVISION_ID, &sbrev);
pci_read_config_byte(pdev, 0x49, &prefctl);
pci_dev_put(lpc_bridge);
- if (sbrev == 0x10 && (prefctl & 0x80)) {
+ if (lpc_bridge->revision == 0x10 && (prefctl & 0x80)) {
chipset = &sis133_early;
break;
}
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index bde7341..8c2813a 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -270,7 +270,6 @@
static int sl82c105_bridge_revision(struct pci_dev *pdev)
{
struct pci_dev *bridge;
- u8 rev;
/*
* The bridge should be part of the same device, but function 0.
@@ -292,10 +291,8 @@
/*
* We need to find function 0's revision, not function 1
*/
- pci_read_config_byte(bridge, PCI_REVISION_ID, &rev);
-
pci_dev_put(bridge);
- return rev;
+ return bridge->revision;
}
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index f0cadbe..f645fe2 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -506,7 +506,6 @@
struct pci_dev *isa = NULL;
const struct via_isa_bridge *config;
static int printed_version;
- u8 t;
u8 enable;
u32 timing;
@@ -520,9 +519,8 @@
!!(config->flags & VIA_BAD_ID),
config->id, NULL))) {
- pci_read_config_byte(isa, PCI_REVISION_ID, &t);
- if (t >= config->rev_min &&
- t <= config->rev_max)
+ if (isa->revision >= config->rev_min &&
+ isa->revision <= config->rev_max)
break;
pci_dev_put(isa);
}
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 3873b29..6dcfc62 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1573,12 +1573,9 @@
static void mv5_reset_bus(struct pci_dev *pdev, void __iomem *mmio)
{
- u8 rev_id;
int early_5080;
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
-
- early_5080 = (pdev->device == 0x5080) && (rev_id == 0);
+ early_5080 = (pdev->device == 0x5080) && (pdev->revision == 0);
if (!early_5080) {
u32 tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL);
@@ -2139,17 +2136,14 @@
{
struct pci_dev *pdev = to_pci_dev(host->dev);
struct mv_host_priv *hpriv = host->private_data;
- u8 rev_id;
u32 hp_flags = hpriv->hp_flags;
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
-
switch(board_idx) {
case chip_5080:
hpriv->ops = &mv5xxx_ops;
hp_flags |= MV_HP_50XX;
- switch (rev_id) {
+ switch (pdev->revision) {
case 0x1:
hp_flags |= MV_HP_ERRATA_50XXB0;
break;
@@ -2169,7 +2163,7 @@
hpriv->ops = &mv5xxx_ops;
hp_flags |= MV_HP_50XX;
- switch (rev_id) {
+ switch (pdev->revision) {
case 0x0:
hp_flags |= MV_HP_ERRATA_50XXB0;
break;
@@ -2188,7 +2182,7 @@
case chip_608x:
hpriv->ops = &mv6xxx_ops;
- switch (rev_id) {
+ switch (pdev->revision) {
case 0x7:
hp_flags |= MV_HP_ERRATA_60X1B2;
break;
@@ -2209,7 +2203,7 @@
hp_flags |= MV_HP_GEN_IIE;
- switch (rev_id) {
+ switch (pdev->revision) {
case 0x0:
hp_flags |= MV_HP_ERRATA_XX42A0;
break;
@@ -2337,14 +2331,12 @@
{
struct pci_dev *pdev = to_pci_dev(host->dev);
struct mv_host_priv *hpriv = host->private_data;
- u8 rev_id, scc;
+ u8 scc;
const char *scc_s, *gen;
/* Use this to determine the HW stepping of the chip so we know
* what errata to workaround
*/
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
-
pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc);
if (scc == 0)
scc_s = "SCSI";