bnx2x: clean up unnecessary MSI/MSI-X capability find

PCI core will initialize device MSI/MSI-X capability in
pci_msi_init_pci_dev(). So device driver should use
pci_dev->msi_cap/msix_cap to determine whether the device
support MSI/MSI-X instead of using
pci_find_capability(pci_dev, PCI_CAP_ID_MSI/MSIX).
Access to PCIe device config space again will consume more time.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Cc: Eilon Greenstein <eilong@broadcom.com>
Cc: netdev@vger.kernel.org
Acked-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index ab5bd6c..39d7db5 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -12544,16 +12544,14 @@ static int bnx2x_set_qm_cid_count(struct bnx2x *bp)
 static int bnx2x_get_num_non_def_sbs(struct pci_dev *pdev,
                                     int cnic_cnt, bool is_vf)
 {
-       int pos, index;
+       int index;
        u16 control = 0;
 
-       pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
-
        /*
         * If MSI-X is not supported - return number of SBs needed to support
         * one fast path queue: one FP queue + SB for CNIC
         */
-       if (!pos) {
+       if (!pdev->msix_cap) {
                dev_info(&pdev->dev, "no msix capability found\n");
                return 1 + cnic_cnt;
        }
@@ -12566,7 +12564,7 @@ static int bnx2x_get_num_non_def_sbs(struct pci_dev *pdev,
         * without the default SB.
         * For VFs there is no default SB, then we return (index+1).
         */
-       pci_read_config_word(pdev, pos  + PCI_MSI_FLAGS, &control);
+       pci_read_config_word(pdev, pdev->msix_cap + PCI_MSI_FLAGS, &control);
 
        index = control & PCI_MSIX_FLAGS_QSIZE;