netdev - [net-next 07/15] ixgbe: Handle previously-freed msix

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Message-Id: <1478332461-43147-8-git-send-email-jeffrey.t.kirsher@intel.com>
Date:   Sat,  5 Nov 2016 00:54:13 -0700
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     davem@...emloft.net
Cc:     Mark Rustad <mark.d.rustad@...el.com>, netdev@...r.kernel.org,
        nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
        guru.anbalagane@...cle.com,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 07/15] ixgbe: Handle previously-freed msix_entries

From: Mark Rustad <mark.d.rustad@...el.com>

The msix_entries memory can be freed by a previous suspend or
remove, so don't crash on close when it isn't there.

Signed-off-by: Mark Rustad <mark.d.rustad@...el.com>
Tested-by: Krishneil Singh <krishneil.k.singh@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 5e1f57c..de634f0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -3070,6 +3070,9 @@ static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
 		return;
 	}
 
+	if (!adapter->msix_entries)
+		return;
+
 	for (vector = 0; vector < adapter->num_q_vectors; vector++) {
 		struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
 		struct msix_entry *entry = &adapter->msix_entries[vector];
-- 
2.7.4