be2net: fix to get max VFs supported from adapter

The user supplied num_vfs value need not be compared
against a static BE_MAX_VF, but can be checked against
the actual VFs that the device can support.

Signed-off-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index d762c2a..bc11078 100644 (file)
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -1947,7 +1947,20 @@ static void be_sriov_enable(struct be_adapter *adapter)
        be_check_sriov_fn_type(adapter);
 #ifdef CONFIG_PCI_IOV
        if (be_physfn(adapter) && num_vfs) {
-               int status;
+               int status, pos;
+               u16 nvfs;
+
+               pos = pci_find_ext_capability(adapter->pdev,
+                                               PCI_EXT_CAP_ID_SRIOV);
+               pci_read_config_word(adapter->pdev,
+                                       pos + PCI_SRIOV_TOTAL_VF, &nvfs);
+
+               if (num_vfs > nvfs) {
+                       dev_info(&adapter->pdev->dev,
+                                       "Device supports %d VFs and not %d\n",
+                                       nvfs, num_vfs);
+                       num_vfs = nvfs;
+               }
 
                status = pci_enable_sriov(adapter->pdev, num_vfs);
                adapter->sriov_enabled = status ? false : true;
@@ -3284,13 +3297,6 @@ static int __init be_init_module(void)
                rx_frag_size = 2048;
        }
 
-       if (num_vfs > 32) {
-               printk(KERN_WARNING DRV_NAME
-                       " : Module param num_vfs must not be greater than 32."
-                       "Using 32\n");
-               num_vfs = 32;
-       }
-
        return pci_register_driver(&be_driver);
 }
 module_init(be_init_module);