net/sonic: use dma_mapping_error() for error check

The DMA address returned by dma_map_single() should be checked with
dma_mapping_error(). Fix it accordingly.

Fixes: efcce83 ("[PATCH] macsonic/jazzsonic network drivers update")
Signed-off-by: Zhang Changzhong <[email protected]>
Tested-by: Stan Johnson <[email protected]>
Signed-off-by: Finn Thain <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Link: https://lore.kernel.org/r/6645a4b5c1e364312103f48b7b36783b94e197a2.1679370343.git.fthain@linux-m68k.org
Signed-off-by: Jakub Kicinski <[email protected]>

Author: Zhang Changzhong

drivers/net/ethernet/natsemi/sonic.c

@@ -292,7 +292,7 @@ static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
 	 */
 
 	laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
-	if (!laddr) {
+	if (dma_mapping_error(lp->device, laddr)) {
 		pr_err_ratelimited("%s: failed to map tx DMA buffer.\n", dev->name);
 		dev_kfree_skb_any(skb);
 		return NETDEV_TX_OK;
@@ -509,7 +509,7 @@ static bool sonic_alloc_rb(struct net_device *dev, struct sonic_local *lp,
 
 	*new_addr = dma_map_single(lp->device, skb_put(*new_skb, SONIC_RBSIZE),
 				   SONIC_RBSIZE, DMA_FROM_DEVICE);
-	if (!*new_addr) {
+	if (dma_mapping_error(lp->device, *new_addr)) {
 		dev_kfree_skb(*new_skb);
 		*new_skb = NULL;
 		return false;