net: thunderx: Rewrite silicon revision tests.

The test for pass-1 silicon was incorrect, it should be for all
revisions less than 8.  Also the revision is already present in the
pci_dev, so there is no need to read and keep a private copy.

Remove rev_id and code to read it from struct nicpf.  Create new
static inline function pass1_silicon() to be used to testing the
silicon version.  Use pass1_silicon() for revision checks, this will
be more widely used in follow on patches.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/net/ethernet/cavium/thunder/nic_main.c b/drivers/net/ethernet/cavium/thunder/nic_main.c
index d6e3219ddeb3..52e1acb69562 100644
--- a/drivers/net/ethernet/cavium/thunder/nic_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nic_main.c
@@ -22,7 +22,6 @@
 
 struct nicpf {
         struct pci_dev          *pdev;
-        u8                      rev_id;
         u8                      node;
         unsigned int            flags;
         u8                      num_vf_en;      /* No of VF enabled */
@@ -54,6 +53,11 @@ struct nicpf {
         bool                    irq_allocated[NIC_PF_MSIX_VECTORS];
 };
 
+static inline bool pass1_silicon(struct nicpf *nic)
+{
+        return nic->pdev->revision < 8;
+}
+
 /* Supported devices */
 static const struct pci_device_id nic_id_table[] = {
         { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_NIC_PF) },
@@ -117,7 +121,7 @@ static void nic_send_msg_to_vf(struct nicpf *nic, int vf, union nic_mbx *mbx)
          * when PF writes to MBOX(1), in next revisions when
          * PF writes to MBOX(0)
          */
-        if (nic->rev_id == 0) {
+        if (pass1_silicon(nic)) {
                 /* see the comment for nic_reg_write()/nic_reg_read()
                  * functions above
                  */
@@ -998,8 +1002,6 @@ static int nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
                 goto err_release_regions;
         }
 
-        pci_read_config_byte(pdev, PCI_REVISION_ID, &nic->rev_id);
-
         nic->node = nic_get_node_id(pdev);
 
         nic_set_lmac_vf_mapping(nic);