From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sun, 19 Jun 2005 05:56:18 +0000 (-0700)
Subject: [IPV4/IPV6]: Replace spin_lock_irq with spin_lock_bh
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e0f9f8586a0b21fb3c7a4ead3804008d57dfdef7;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[IPV4/IPV6]: Replace spin_lock_irq with spin_lock_bh

In light of my recent patch to net/ipv4/udp.c that replaced the
spin_lock_irq calls on the receive queue lock with spin_lock_bh,
here is a similar patch for all other occurences of spin_lock_irq
on receive/error queue locks in IPv4 and IPv6.

In these stacks, we know that they can only be entered from user
or softirq context.  Therefore it's safe to disable BH only.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 47012b93cad2..f8b172f89811 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -360,14 +360,14 @@ int ip_recv_error(struct sock *sk, struct msghdr *msg, int len)
 	err = copied;
 
 	/* Reset and regenerate socket error */
-	spin_lock_irq(&sk->sk_error_queue.lock);
+	spin_lock_bh(&sk->sk_error_queue.lock);
 	sk->sk_err = 0;
 	if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) {
 		sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno;
-		spin_unlock_irq(&sk->sk_error_queue.lock);
+		spin_unlock_bh(&sk->sk_error_queue.lock);
 		sk->sk_error_report(sk);
 	} else
-		spin_unlock_irq(&sk->sk_error_queue.lock);
+		spin_unlock_bh(&sk->sk_error_queue.lock);
 
 out_free_skb:	
 	kfree_skb(skb);
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 5b1ec586bae6..8c1512021ee8 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -691,11 +691,11 @@ static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
 			struct sk_buff *skb;
 			int amount = 0;
 
-			spin_lock_irq(&sk->sk_receive_queue.lock);
+			spin_lock_bh(&sk->sk_receive_queue.lock);
 			skb = skb_peek(&sk->sk_receive_queue);
 			if (skb != NULL)
 				amount = skb->len;
-			spin_unlock_irq(&sk->sk_receive_queue.lock);
+			spin_unlock_bh(&sk->sk_receive_queue.lock);
 			return put_user(amount, (int __user *)arg);
 		}
 
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 65b9375df57d..5229365cd8b4 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -353,14 +353,14 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
 	err = copied;
 
 	/* Reset and regenerate socket error */
-	spin_lock_irq(&sk->sk_error_queue.lock);
+	spin_lock_bh(&sk->sk_error_queue.lock);
 	sk->sk_err = 0;
 	if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) {
 		sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno;
-		spin_unlock_irq(&sk->sk_error_queue.lock);
+		spin_unlock_bh(&sk->sk_error_queue.lock);
 		sk->sk_error_report(sk);
 	} else {
-		spin_unlock_irq(&sk->sk_error_queue.lock);
+		spin_unlock_bh(&sk->sk_error_queue.lock);
 	}
 
 out_free_skb:	
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 617645bc5ed6..e2b848ec9851 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -434,12 +434,12 @@ csum_copy_err:
 	/* Clear queue. */
 	if (flags&MSG_PEEK) {
 		int clear = 0;
-		spin_lock_irq(&sk->sk_receive_queue.lock);
+		spin_lock_bh(&sk->sk_receive_queue.lock);
 		if (skb == skb_peek(&sk->sk_receive_queue)) {
 			__skb_unlink(skb, &sk->sk_receive_queue);
 			clear = 1;
 		}
-		spin_unlock_irq(&sk->sk_receive_queue.lock);
+		spin_unlock_bh(&sk->sk_receive_queue.lock);
 		if (clear)
 			kfree_skb(skb);
 	}
@@ -971,11 +971,11 @@ static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
 			struct sk_buff *skb;
 			int amount = 0;
 
-			spin_lock_irq(&sk->sk_receive_queue.lock);
+			spin_lock_bh(&sk->sk_receive_queue.lock);
 			skb = skb_peek(&sk->sk_receive_queue);
 			if (skb != NULL)
 				amount = skb->tail - skb->h.raw;
-			spin_unlock_irq(&sk->sk_receive_queue.lock);
+			spin_unlock_bh(&sk->sk_receive_queue.lock);
 			return put_user(amount, (int __user *)arg);
 		}
 
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index e251d0ba4f39..eff050ac7049 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -300,12 +300,12 @@ csum_copy_err:
 	/* Clear queue. */
 	if (flags&MSG_PEEK) {
 		int clear = 0;
-		spin_lock_irq(&sk->sk_receive_queue.lock);
+		spin_lock_bh(&sk->sk_receive_queue.lock);
 		if (skb == skb_peek(&sk->sk_receive_queue)) {
 			__skb_unlink(skb, &sk->sk_receive_queue);
 			clear = 1;
 		}
-		spin_unlock_irq(&sk->sk_receive_queue.lock);
+		spin_unlock_bh(&sk->sk_receive_queue.lock);
 		if (clear)
 			kfree_skb(skb);
 	}