net/bnxt: check access to possible null pointer

Check that pointers are valid before using them.

Fixes: 7bc8e9a227ccb ("net/bnxt: support async link notification")
Cc: stable@dpdk.org
Signed-off-by: Thierry Herbelot <thierry.herbelot@6wind.com>
Acked-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

diff --git a/drivers/net/bnxt/bnxt_irq.c b/drivers/net/bnxt/bnxt_irq.c
index 8abbadb..fd8b8fa 100644 (file)
--- a/drivers/net/bnxt/bnxt_irq.c
+++ b/drivers/net/bnxt/bnxt_irq.c
@@ -21,11 +21,14 @@ void bnxt_int_handler(void *param)
 {
        struct rte_eth_dev *eth_dev = (struct rte_eth_dev *)param;
        struct bnxt *bp = eth_dev->data->dev_private;
-       struct bnxt_cp_ring_info *cpr = bp->async_cp_ring;
+       struct bnxt_cp_ring_info *cpr;
        struct cmpl_base *cmp;
        uint32_t raw_cons;
        uint32_t cons;
 
+       if (bp == NULL)
+               return;
+       cpr = bp->async_cp_ring;
        if (cpr == NULL)
                return;