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>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/net/e100.c b/drivers/net/e100.c
index 74ea6373c7cd..6b6401e9304e 100644
--- a/drivers/net/e100.c
+++ b/drivers/net/e100.c
@@ -583,7 +583,6 @@ struct nic {
         u32 rx_tco_frames;
         u32 rx_over_length_errors;
 
-        u8 rev_id;
         u16 leds;
         u16 eeprom_wc;
         u16 eeprom[256];
@@ -937,9 +936,8 @@ static void e100_get_defaults(struct nic *nic)
         struct param_range rfds = { .min = 16, .max = 256, .count = 256 };
         struct param_range cbs  = { .min = 64, .max = 256, .count = 128 };
 
-        pci_read_config_byte(nic->pdev, PCI_REVISION_ID, &nic->rev_id);
         /* MAC type is encoded as rev ID; exception: ICH is treated as 82559 */
-        nic->mac = (nic->flags & ich) ? mac_82559_D101M : nic->rev_id;
+        nic->mac = (nic->flags & ich) ? mac_82559_D101M : nic->pdev->revision;
         if(nic->mac == mac_unknown)
                 nic->mac = mac_82557_D100_A;
 
@@ -1279,7 +1277,7 @@ static void e100_setup_ucode(struct nic *nic, struct cb *cb, struct sk_buff *skb
         if (nic->flags & ich)
                 goto noloaducode;
 
-        /* Search for ucode match against h/w rev_id */
+        /* Search for ucode match against h/w revision */
         for (opts = ucode_opts; opts->mac; opts++) {
                 int i;
                 u32 *ucode = opts->ucode;
@@ -2238,7 +2236,7 @@ static void e100_get_regs(struct net_device *netdev,
         u32 *buff = p;
         int i;
 
-        regs->version = (1 << 24) | nic->rev_id;
+        regs->version = (1 << 24) | nic->pdev->revision;
         buff[0] = ioread8(&nic->csr->scb.cmd_hi) << 24 |
                 ioread8(&nic->csr->scb.cmd_lo) << 16 |
                 ioread16(&nic->csr->scb.status);