[net,08/12] cxgb4: remove cast when saving IPv4 partial checksum

Message ID cb8a57ddf00aa4ac4de71df85346cc9f78d0ee2b.1592942138.git.rahul.lakkireddy@chelsio.com
State New
Headers show
  • cxgb4/cxgb4vf: fix warnings reported by sparse
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Commit Message

Rahul Lakkireddy June 23, 2020, 8:21 p.m.
The checksum field in IPv4 header is in __sum16 and ip_fast_csum()
also returns __sum16. So, no need to cast it to u16.

Fixes following sparse warning:
sge.c:1539:47: warning: cast from restricted __sum16
sge.c:1539:44: warning: incorrect type in assignment (different base types)
sge.c:1539:44:    expected restricted __sum16 [usertype] check
sge.c:1539:44:    got unsigned short [usertype]

Fixes: d0a1299c6bf7 ("cxgb4: add support for vxlan segmentation offload")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
 drivers/net/ethernet/chelsio/cxgb4/sge.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)


diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index 3c8b4b153ec4..72ff46b16704 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -1524,8 +1524,7 @@  static netdev_tx_t cxgb4_eth_xmit(struct sk_buff *skb, struct net_device *dev)
 			if (iph->version == 4) {
 				iph->check = 0;
 				iph->tot_len = 0;
-				iph->check = (u16)(~ip_fast_csum((u8 *)iph,
-								 iph->ihl));
+				iph->check = ~ip_fast_csum((u8 *)iph, iph->ihl);
 			if (skb->ip_summed == CHECKSUM_PARTIAL)
 				cntrl = hwcsum(adap->params.chip, skb);