net/bnxt: fix crash after port stop/start

[ upstream commit 61cd438 ]

On chips like Thor, port stop/start sequence could result in a crash
in the application. This is because of false detection of a bad
opaque in the Rx completion and the subsequent kicking-in of the ring
reset code to recover from the condition.
The root cause being that the port stop/start would result in the HW
starting with fresh values, while the driver internal tracker variable
`rx_next_cons` is still pointing to a stale value.
Fix this by resetting rx_next_cons to 0 in bnxt_init_one_rx_ring()

Fixes: 03c8f2f ("net/bnxt: detect bad opaque in Rx completion")

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

drivers/net/bnxt/bnxt_rxr.c

@@ -1308,5 +1308,8 @@ int bnxt_init_one_rx_ring(struct bnxt_rx_queue *rxq)
 	}
 	PMD_DRV_LOG(DEBUG, "TPA alloc Done!\n");
 
+	/* Explicitly reset this driver internal tracker on a ring init */
+	rxr->rx_next_cons = 0;
+
 	return 0;
 }