e1000e: e1000e_enable_tx_pkt_filtering() returns wrong value

e1000e_enable_tx_pkt_filtering() will return a non-zero value if the
driver fails to enable the manageability interface on the host for
any reason; instead it should retun zero to indicate filtering has been
disabled.  Also provide a single exit point for the function.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 7 deletions

diff --git a/drivers/net/e1000e/lib.c b/drivers/net/e1000e/lib.c
index 56b59e4a6871..97649bf53b05 100644
--- a/drivers/net/e1000e/lib.c
+++ b/drivers/net/e1000e/lib.c
@@ -2301,10 +2301,12 @@ bool e1000e_enable_tx_pkt_filtering(struct e1000_hw *hw)
         s32 ret_val, hdr_csum, csum;
         u8 i, len;
 
+        hw->mac.tx_pkt_filtering = true;
+
         /* No manageability, no filtering */
         if (!e1000e_check_mng_mode(hw)) {
                 hw->mac.tx_pkt_filtering = false;
-                return 0;
+                goto out;
         }
 
         /*
@@ -2312,9 +2314,9 @@ bool e1000e_enable_tx_pkt_filtering(struct e1000_hw *hw)
          * reason, disable filtering.
          */
         ret_val = e1000_mng_enable_host_if(hw);
-        if (ret_val != 0) {
+        if (ret_val) {
                 hw->mac.tx_pkt_filtering = false;
-                return ret_val;
+                goto out;
         }
 
         /* Read in the header.  Length and offset are in dwords. */
@@ -2333,17 +2335,17 @@ bool e1000e_enable_tx_pkt_filtering(struct e1000_hw *hw)
          */
         if ((hdr_csum != csum) || (hdr->signature != E1000_IAMT_SIGNATURE)) {
                 hw->mac.tx_pkt_filtering = true;
-                return 1;
+                goto out;
         }
 
         /* Cookie area is valid, make the final check for filtering. */
         if (!(hdr->status & E1000_MNG_DHCP_COOKIE_STATUS_PARSING)) {
                 hw->mac.tx_pkt_filtering = false;
-                return 0;
+                goto out;
         }
 
-        hw->mac.tx_pkt_filtering = true;
-        return 1;
+out:
+        return hw->mac.tx_pkt_filtering;
 }
 
 /**