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, 2 insertions, 5 deletions

diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 56f8197b953b..b703ccfe040b 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -54,8 +54,6 @@ static char netxen_nic_driver_string[] = "NetXen Network Driver version "
 #define NETXEN_ADAPTER_UP_MAGIC 777
 #define NETXEN_NIC_PEG_TUNE 0
 
-u8 nx_p2_id = NX_P2_C0;
-
 #define DMA_32BIT_MASK  0x00000000ffffffffULL
 #define DMA_35BIT_MASK  0x00000007ffffffffULL
 
@@ -307,8 +305,7 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
                 goto err_out_disable_pdev;
 
         pci_set_master(pdev);
-        pci_read_config_byte(pdev, PCI_REVISION_ID, &nx_p2_id);
-        if (nx_p2_id == NX_P2_C1 &&
+        if (pdev->revision == NX_P2_C1 &&
             (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
             (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
                 pci_using_dac = 1;
@@ -552,7 +549,7 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
         adapter->ahw.pdev = pdev;
         adapter->proc_cmd_buf_counter = 0;
-        adapter->ahw.revision_id = nx_p2_id;
+        adapter->ahw.revision_id = pdev->revision;
 
         /* make sure Window == 1 */
         netxen_nic_pci_change_crbwindow(adapter, 1);