netdev - [PATCH v2 net-next 2/3] liquidio: lowmem: do not dereference null ptr

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Message-ID: <20170718005110.GA1567@felix-thinkpad.cavium.com>
Date:   Mon, 17 Jul 2017 17:51:10 -0700
From:   Felix Manlunas <felix.manlunas@...ium.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, raghu.vatsavayi@...ium.com,
        derek.chickles@...ium.com, satananda.burla@...ium.com,
        ricardo.farrington@...ium.com
Subject: [PATCH v2 net-next 2/3] liquidio: lowmem: do not dereference null ptr

From: Rick Farrington <ricardo.farrington@...ium.com>

Don't dereference a NULL ptr in octeon_droq_destroy_ring_buffers().

Signed-off-by: Rick Farrington <ricardo.farrington@...ium.com>
Signed-off-by: Satanand Burla <satananda.burla@...ium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@...ium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@...ium.com>
---
 drivers/net/ethernet/cavium/liquidio/octeon_droq.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_droq.c b/drivers/net/ethernet/cavium/liquidio/octeon_droq.c
index 6456683..f7b5d68 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_droq.c
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_droq.c
@@ -145,6 +145,8 @@ octeon_droq_destroy_ring_buffers(struct octeon_device *oct,
 
 	for (i = 0; i < droq->max_count; i++) {
 		pg_info = &droq->recv_buf_list[i].pg_info;
+		if (!pg_info)
+			continue;
 
 		if (pg_info->dma)
 			lio_unmap_ring(oct->pci_dev,
-- 
2.9.0