examples/ioat: fix failure check for ioat dequeue

The nb_dq return value from the ioat dequeue is negative in failure
cases, however the variable was an unsigned int, causing the condition
where nb_dq <= 0 to never be true. This is now cast to a signed int,
which will successfully reflect the -1 value to be used in this
conditional check.

Coverity issue: 350342
Coverity issue: 350349
Fixes: 92c981637ffc ("examples/ioat: handle failure case for ioat dequeue")
Cc: stable@dpdk.org
Signed-off-by: Ciara Power <ciara.power@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

diff --git a/examples/ioat/ioatfwd.c b/examples/ioat/ioatfwd.c
index b39a098..8a60768 100644 (file)
--- a/examples/ioat/ioatfwd.c
+++ b/examples/ioat/ioatfwd.c
@@ -460,7 +460,7 @@ ioat_tx_port(struct rxtx_port_config *tx_config)
                                MAX_PKT_BURST, NULL);
                }
 
-               if (nb_dq <= 0)
+               if ((int32_t) nb_dq <= 0)
                        return;
 
                if (copy_mode == COPY_MODE_IOAT_NUM)