Michael Chan 3b2b7d9db7 bnxt_en: Check for NULL rx or tx ring.
Each bnxt_napi structure may no longer be having both an rx ring and
a tx ring.  Check for a valid ring before using it.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-04 15:54:39 -05:00
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