net/bnxt: fix null dereference in interrupt handler

[ upstream commit 3f44ec4 ]

Coverity reports that pointer "cpr->cp_ring_struct" may be
dereferenced with null value. This patch fixes this.

Coverity issue: 372063
Fixes: 5ed30db ("net/bnxt: fix missing barriers in completion handling")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>

drivers/net/bnxt/bnxt_irq.c

@@ -45,6 +45,7 @@ void bnxt_int_handler(void *param)
 			return;
 		}
 
+		cp_ring_size = cpr->cp_ring_struct->ring_size;
 		cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
 		cmp = &cpr->cp_desc_ring[cons];