net/qede/base: fix multiple acquisition requests by VF

There are certain conditions under which VF would infinitely send
ACQUIRE messages, as it will fail to understand that PF has rejected
the ACQUIRE request. Fix to reject multiple acquisition requests by VF.

Fixes: 22d07d939c3c ("net/qede/base: update")

Signed-off-by: Rasesh Mody <rasesh.mody@cavium.com>

diff --git a/drivers/net/qede/base/ecore_vf.c b/drivers/net/qede/base/ecore_vf.c
index be8b1ec..161b317 100644 (file)
--- a/drivers/net/qede/base/ecore_vf.c
+++ b/drivers/net/qede/base/ecore_vf.c
@@ -296,6 +296,14 @@ static enum _ecore_status_t ecore_vf_pf_acquire(struct ecore_hwfn *p_hwfn)
                                                VFPF_ACQUIRE_CAP_PRE_FP_HSI;
                                }
                        }
+
+                       /* If PF/VF are using same Major, PF must have had
+                        * it's reasons. Simply fail.
+                        */
+                       DP_NOTICE(p_hwfn, false,
+                                 "PF rejected acquisition by VF\n");
+                       rc = ECORE_INVAL;
+                       goto exit;
                } else {
                        DP_ERR(p_hwfn,
                               "PF returned err %d to VF acquisition request\n",