[PATCH net] ethernet: ionic: Fix DMA mapping test in `ionic_xdp_post_frame()`

[Thomas Fourier]

The `ionic_tx_map_frag()` wrapper function is used which returns 0 or a
valid DMA address.  Testing that pointer with `dma_mapping_error()`could
be eroneous since the error value exptected by `dma_mapping_error()` is
not 0 but `DMA_MAPPING_ERROR` which is often ~0.

Fixes: ac8813c0ab7d ("ionic: convert Rx queue buffers to use page_pool")
Signed-off-by: Thomas Fourier <fourier.thomas@xxxxxxxxx>
---
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index 2ac59564ded1..beefdc43013e 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -357,7 +357,7 @@ static int ionic_xdp_post_frame(struct ionic_queue *q, struct xdp_frame *frame,
 			} else {
 				dma_addr = ionic_tx_map_frag(q, frag, 0,
 							     skb_frag_size(frag));
-				if (dma_mapping_error(q->dev, dma_addr)) {
+				if (!dma_addr) {
 					ionic_tx_desc_unmap_bufs(q, desc_info);
 					return -EIO;
 				}
-- 
2.43.0