examples/vhost: add error propagation in ioat ops

This patch adds add error propagation for rte_ioat_completed_ops call,
and also changes dev_id type from int to uint16_t.

Signed-off-by: Cheng Jiang <cheng1.jiang@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/examples/vhost/ioat.c b/examples/vhost/ioat.c
index dbad28d..60b73be 100644 (file)
--- a/examples/vhost/ioat.c
+++ b/examples/vhost/ioat.c
@@ -22,7 +22,6 @@ struct packet_tracker {
 
 struct packet_tracker cb_tracker[MAX_VHOST_DEVICE];
 
-
 int
 open_ioat(const char *value)
 {
@@ -129,7 +128,7 @@ ioat_transfer_data_cb(int vid, uint16_t queue_id,
                struct rte_vhost_async_status *opaque_data, uint16_t count)
 {
        uint32_t i_desc;
-       int dev_id = dma_bind[vid].dmas[queue_id * 2 + VIRTIO_RXQ].dev_id;
+       uint16_t dev_id = dma_bind[vid].dmas[queue_id * 2 + VIRTIO_RXQ].dev_id;
        struct rte_vhost_iov_iter *src = NULL;
        struct rte_vhost_iov_iter *dst = NULL;
        unsigned long i_seg;
@@ -182,10 +181,17 @@ ioat_check_completed_copies_cb(int vid, uint16_t queue_id,
                unsigned short mask = MAX_ENQUEUED_SIZE - 1;
                unsigned short i;
 
-               int dev_id = dma_bind[vid].dmas[queue_id * 2
+               uint16_t dev_id = dma_bind[vid].dmas[queue_id * 2
                                + VIRTIO_RXQ].dev_id;
                n_seg = rte_ioat_completed_ops(dev_id, 255, dump, dump);
-               if (n_seg <= 0)
+               if (n_seg < 0) {
+                       RTE_LOG(ERR,
+                               VHOST_DATA,
+                               "fail to poll completed buf on IOAT device %u",
+                               dev_id);
+                       return 0;
+               }
+               if (n_seg == 0)
                        return 0;
 
                cb_tracker[dev_id].ioat_space += n_seg;