diff mbox series

[v2,net-next,4/6] arp: Remove a nest in arp_req_get().

Message ID 20240425170002.68160-5-kuniyu@amazon.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series arp: Random clean up and RCU conversion for ioctl(SIOCGARP). | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 928 this patch: 928
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 938 this patch: 938
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 939 this patch: 939
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 41 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Kuniyuki Iwashima April 25, 2024, 5 p.m. UTC 
This is a prep patch to make the following changes tidy.

No functional change intended.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 net/ipv4/arp.c | 31 ++++++++++++++++++-------------
 1 file changed, 18 insertions(+), 13 deletions(-)
diff mbox series

Patch

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index ac3e15799c2f..60f633b24ec8 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -1138,23 +1138,28 @@  static int arp_req_get(struct arpreq *r, struct net_device *dev)
 {
 	__be32 ip = ((struct sockaddr_in *) &r->arp_pa)->sin_addr.s_addr;
 	struct neighbour *neigh;
-	int err = -ENXIO;
 
 	neigh = neigh_lookup(&arp_tbl, &ip, dev);
-	if (neigh) {
-		if (!(READ_ONCE(neigh->nud_state) & NUD_NOARP)) {
-			read_lock_bh(&neigh->lock);
-			memcpy(r->arp_ha.sa_data, neigh->ha,
-			       min(dev->addr_len, sizeof(r->arp_ha.sa_data_min)));
-			r->arp_flags = arp_state_to_flags(neigh);
-			read_unlock_bh(&neigh->lock);
-			r->arp_ha.sa_family = dev->type;
-			strscpy(r->arp_dev, dev->name, sizeof(r->arp_dev));
-			err = 0;
-		}
+	if (!neigh)
+		return -ENXIO;
+
+	if (READ_ONCE(neigh->nud_state) & NUD_NOARP) {
 		neigh_release(neigh);
+		return -ENXIO;
 	}
-	return err;
+
+	read_lock_bh(&neigh->lock);
+	memcpy(r->arp_ha.sa_data, neigh->ha,
+	       min(dev->addr_len, sizeof(r->arp_ha.sa_data_min)));
+	r->arp_flags = arp_state_to_flags(neigh);
+	read_unlock_bh(&neigh->lock);
+
+	neigh_release(neigh);
+
+	r->arp_ha.sa_family = dev->type;
+	strscpy(r->arp_dev, dev->name, sizeof(r->arp_dev));
+
+	return 0;
 }
 
 int arp_invalidate(struct net_device *dev, __be32 ip, bool force)