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, 4 insertions, 21 deletions

diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index fa29a403a24..58bbfdd4f90 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -1135,7 +1135,7 @@ static int init_nic(struct s2io_nic *nic)
          * SXE-008 TRANSMIT DMA ARBITRATION ISSUE.
          */
         if ((nic->device_type == XFRAME_I_DEVICE) &&
-                (get_xena_rev_id(nic->pdev) < 4))
+                (nic->pdev->revision < 4))
                 writeq(PCC_ENABLE_FOUR, &bar0->pcc_enable);
 
         val64 = readq(&bar0->tx_fifo_partition_0);
@@ -1873,7 +1873,7 @@ static int verify_pcc_quiescent(struct s2io_nic *sp, int flag)
         herc = (sp->device_type == XFRAME_II_DEVICE);
 
         if (flag == FALSE) {
-                if ((!herc && (get_xena_rev_id(sp->pdev) >= 4)) || herc) {
+                if ((!herc && (sp->pdev->revision >= 4)) || herc) {
                         if (!(val64 & ADAPTER_STATUS_RMAC_PCC_IDLE))
                                 ret = 1;
                 } else {
@@ -1881,7 +1881,7 @@ static int verify_pcc_quiescent(struct s2io_nic *sp, int flag)
                                 ret = 1;
                 }
         } else {
-                if ((!herc && (get_xena_rev_id(sp->pdev) >= 4)) || herc) {
+                if ((!herc && (sp->pdev->revision >= 4)) || herc) {
                         if (((val64 & ADAPTER_STATUS_RMAC_PCC_IDLE) ==
                              ADAPTER_STATUS_RMAC_PCC_IDLE))
                                 ret = 1;
@@ -7076,23 +7076,6 @@ static void s2io_link(struct s2io_nic * sp, int link)
 }
 
 /**
- *  get_xena_rev_id - to identify revision ID of xena.
- *  @pdev : PCI Dev structure
- *  Description:
- *  Function to identify the Revision ID of xena.
- *  Return value:
- *  returns the revision ID of the device.
- */
-
-static int get_xena_rev_id(struct pci_dev *pdev)
-{
-        u8 id = 0;
-        int ret;
-        ret = pci_read_config_byte(pdev, PCI_REVISION_ID, (u8 *) & id);
-        return id;
-}
-
-/**
  *  s2io_init_pci -Initialization of PCI and PCI-X configuration registers .
  *  @sp : private member of the device structure, which is a pointer to the
  *  s2io_nic structure.
@@ -7550,7 +7533,7 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
         s2io_vpd_read(sp);
         DBG_PRINT(ERR_DBG, "Copyright(c) 2002-2007 Neterion Inc.\n");
         DBG_PRINT(ERR_DBG, "%s: Neterion %s (rev %d)\n",dev->name,
-                  sp->product_name, get_xena_rev_id(sp->pdev));
+                  sp->product_name, pdev->revision);
         DBG_PRINT(ERR_DBG, "%s: Driver version %s\n", dev->name,
                   s2io_driver_version);
         DBG_PRINT(ERR_DBG, "%s: MAC ADDR: "