be2net: gracefully handle situations when UE is detected

Avoid accessing the hardware when UE is detected.

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

2 files changed, 16 insertions, 0 deletions

diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c
index 8fa9a709d9f..619ebc24602 100644
--- a/drivers/net/benet/be_cmds.c
+++ b/drivers/net/benet/be_cmds.c
@@ -23,6 +23,12 @@ static void be_mcc_notify(struct be_adapter *adapter)
         struct be_queue_info *mccq = &adapter->mcc_obj.q;
         u32 val = 0;
 
+        if (adapter->eeh_err) {
+                dev_info(&adapter->pdev->dev,
+                        "Error in Card Detected! Cannot issue commands\n");
+                return;
+        }
+
         val |= mccq->id & DB_MCCQ_RING_ID_MASK;
         val |= 1 << DB_MCCQ_NUM_POSTED_SHIFT;
 
@@ -217,6 +223,9 @@ static int be_mcc_wait_compl(struct be_adapter *adapter)
         int i, num, status = 0;
         struct be_mcc_obj *mcc_obj = &adapter->mcc_obj;
 
+        if (adapter->eeh_err)
+                return -EIO;
+
         for (i = 0; i < mcc_timeout; i++) {
                 num = be_process_mcc(adapter, &status);
                 if (num)
@@ -246,6 +255,12 @@ static int be_mbox_db_ready_wait(struct be_adapter *adapter, void __iomem *db)
         int msecs = 0;
         u32 ready;
 
+        if (adapter->eeh_err) {
+                dev_err(&adapter->pdev->dev,
+                        "Error detected in card.Cannot issue commands\n");
+                return -EIO;
+        }
+
         do {
                 ready = ioread32(db);
                 if (ready == 0xffffffff) {
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 7e83c06f913..1f5e342dd88 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -1827,6 +1827,7 @@ void be_detect_dump_ue(struct be_adapter *adapter)
 
         if (ue_status_lo || ue_status_hi) {
                 adapter->ue_detected = true;
+                adapter->eeh_err = true;
                 dev_err(&adapter->pdev->dev, "UE Detected!!\n");
         }