RDMA/bnxt_re: Fix out of bound check

Driver exports pacing stats only on GenP5 and P7 adapters. But while
parsing the pacing stats, driver has a check for "rdev->dbr_pacing".  This
caused a trace when KASAN is enabled.

BUG: KASAN: slab-out-of-bounds in bnxt_re_get_hw_stats+0x2b6a/0x2e00 [bnxt_re]
Write of size 8 at addr ffff8885942a6340 by task modprobe/4809

Fixes: 8b6573f ("bnxt_re: Update the debug counters for doorbell pacing")
Link: https://patch.msgid.link/r/[email protected]
Signed-off-by: Kalesh AP <[email protected]>
Signed-off-by: Selvin Xavier <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

Author: Kalesh AP

drivers/infiniband/hw/bnxt_re/hw_counters.c

@@ -366,7 +366,7 @@ int bnxt_re_ib_get_hw_stats(struct ib_device *ibdev,
 				goto done;
 			}
 		}
-		if (rdev->pacing.dbr_pacing)
+		if (rdev->pacing.dbr_pacing && bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
 			bnxt_re_copy_db_pacing_stats(rdev, stats);
 	}