[dpdk-dev] [PATCH] examples/ioat: fix failure check for ioat dequeue

Ciara Power ciara.power at intel.com
Tue Feb 4 17:00:06 CET 2020

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: bruce.richardson at intel.com
Cc: stable at dpdk.org

Signed-off-by: Ciara Power <ciara.power at intel.com>
 examples/ioat/ioatfwd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/ioat/ioatfwd.c b/examples/ioat/ioatfwd.c
index e9117718f..f460a5c92 100644
--- a/examples/ioat/ioatfwd.c
+++ b/examples/ioat/ioatfwd.c
@@ -460,7 +460,7 @@ ioat_tx_port(struct rxtx_port_config *tx_config)
-		if (nb_dq <= 0)
+		if ((int32_t) nb_dq <= 0)
 		if (copy_mode == COPY_MODE_IOAT_NUM)

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