Merge remote-tracking branch 'airlied/drm-fixes' into drm-intel-next-queued

Back-merge from drm-fixes into drm-intel-next to sort out two things:

- interlaced support: -fixes contains a bugfix to correctly clear
  interlaced configuration bits in case the bios sets up an interlaced
  mode and we want to set up the progressive mode (current kernels
  don't support interlaced). The actual feature work to support
  interlaced depends upon (and conflicts with) this bugfix.

- forcewake voodoo to workaround missed IRQ issues: -fixes only enabled
  this for ivybridge, but some recent bug reports indicate that we
  need this on Sandybridge, too. But in a slightly different flavour
  and with other fixes and reworks on top. Additionally there are some
  forcewake cleanup patches heading to -next that would conflict with
  currrent -fixes.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 21 insertions, 16 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 84d0bd5..d97e071 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -136,7 +136,7 @@ static int ip6_finish_output2(struct sk_buff *skb)
 	}
 
 	rcu_read_lock();
-	neigh = dst_get_neighbour(dst);
+	neigh = dst_get_neighbour_noref(dst);
 	if (neigh) {
 		int res = neigh_output(neigh, skb);
 
@@ -238,8 +238,8 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	hdr->nexthdr = proto;
 	hdr->hop_limit = hlimit;
 
-	ipv6_addr_copy(&hdr->saddr, &fl6->saddr);
-	ipv6_addr_copy(&hdr->daddr, first_hop);
+	hdr->saddr = fl6->saddr;
+	hdr->daddr = *first_hop;
 
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;
@@ -290,8 +290,8 @@ int ip6_nd_hdr(struct sock *sk, struct sk_buff *skb, struct net_device *dev,
 	hdr->nexthdr = proto;
 	hdr->hop_limit = np->hop_limit;
 
-	ipv6_addr_copy(&hdr->saddr, saddr);
-	ipv6_addr_copy(&hdr->daddr, daddr);
+	hdr->saddr = *saddr;
+	hdr->daddr = *daddr;
 
 	return 0;
 }
@@ -329,10 +329,11 @@ static int ip6_forward_proxy_check(struct sk_buff *skb)
 {
 	struct ipv6hdr *hdr = ipv6_hdr(skb);
 	u8 nexthdr = hdr->nexthdr;
+	__be16 frag_off;
 	int offset;
 
 	if (ipv6_ext_hdr(nexthdr)) {
-		offset = ipv6_skip_exthdr(skb, sizeof(*hdr), &nexthdr);
+		offset = ipv6_skip_exthdr(skb, sizeof(*hdr), &nexthdr, &frag_off);
 		if (offset < 0)
 			return 0;
 	} else
@@ -462,7 +463,7 @@ int ip6_forward(struct sk_buff *skb)
 	   send redirects to source routed frames.
 	   We don't send redirects to frames decapsulated from IPsec.
 	 */
-	n = dst_get_neighbour(dst);
+	n = dst_get_neighbour_noref(dst);
 	if (skb->dev == dst->dev && n && opt->srcrt == 0 && !skb_sec_path(skb)) {
 		struct in6_addr *target = NULL;
 		struct rt6_info *rt;
@@ -603,7 +604,7 @@ void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt)
 	static atomic_t ipv6_fragmentation_id;
 	int old, new;
 
-	if (rt) {
+	if (rt && !(rt->dst.flags & DST_NOPEER)) {
 		struct inet_peer *peer;
 
 		if (!rt->rt6i_peer)
@@ -631,6 +632,7 @@ int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 	struct ipv6hdr *tmp_hdr;
 	struct frag_hdr *fh;
 	unsigned int mtu, hlen, left, len;
+	int hroom, troom;
 	__be32 frag_id = 0;
 	int ptr, offset = 0, err=0;
 	u8 *prevhdr, nexthdr = 0;
@@ -797,6 +799,8 @@ slow_path:
 	 */
 
 	*prevhdr = NEXTHDR_FRAGMENT;
+	hroom = LL_RESERVED_SPACE(rt->dst.dev);
+	troom = rt->dst.dev->needed_tailroom;
 
 	/*
 	 *	Keep copying data until we run out.
@@ -815,7 +819,8 @@ slow_path:
 		 *	Allocate buffer.
 		 */
 
-		if ((frag = alloc_skb(len+hlen+sizeof(struct frag_hdr)+LL_ALLOCATED_SPACE(rt->dst.dev), GFP_ATOMIC)) == NULL) {
+		if ((frag = alloc_skb(len + hlen + sizeof(struct frag_hdr) +
+				      hroom + troom, GFP_ATOMIC)) == NULL) {
 			NETDEBUG(KERN_INFO "IPv6: frag: no memory for new fragment!\n");
 			IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 				      IPSTATS_MIB_FRAGFAILS);
@@ -828,7 +833,7 @@ slow_path:
 		 */
 
 		ip6_copy_metadata(frag, skb);
-		skb_reserve(frag, LL_RESERVED_SPACE(rt->dst.dev));
+		skb_reserve(frag, hroom);
 		skb_put(frag, len + hlen + sizeof(struct frag_hdr));
 		skb_reset_network_header(frag);
 		fh = (struct frag_hdr *)(skb_network_header(frag) + hlen);
@@ -978,7 +983,7 @@ static int ip6_dst_lookup_tail(struct sock *sk,
 	 * dst entry of the nexthop router
 	 */
 	rcu_read_lock();
-	n = dst_get_neighbour(*dst);
+	n = dst_get_neighbour_noref(*dst);
 	if (n && !(n->nud_state & NUD_VALID)) {
 		struct inet6_ifaddr *ifp;
 		struct flowi6 fl_gw6;
@@ -1059,7 +1064,7 @@ struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
 	if (err)
 		return ERR_PTR(err);
 	if (final_dst)
-		ipv6_addr_copy(&fl6->daddr, final_dst);
+		fl6->daddr = *final_dst;
 	if (can_sleep)
 		fl6->flowi6_flags |= FLOWI_FLAG_CAN_SLEEP;
 
@@ -1095,7 +1100,7 @@ struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
 	if (err)
 		return ERR_PTR(err);
 	if (final_dst)
-		ipv6_addr_copy(&fl6->daddr, final_dst);
+		fl6->daddr = *final_dst;
 	if (can_sleep)
 		fl6->flowi6_flags |= FLOWI_FLAG_CAN_SLEEP;
 
@@ -1588,7 +1593,7 @@ int ip6_push_pending_frames(struct sock *sk)
 	if (np->pmtudisc < IPV6_PMTUDISC_DO)
 		skb->local_df = 1;
 
-	ipv6_addr_copy(final_dst, &fl6->daddr);
+	*final_dst = fl6->daddr;
 	__skb_pull(skb, skb_network_header_len(skb));
 	if (opt && opt->opt_flen)
 		ipv6_push_frag_opts(skb, opt, &proto);
@@ -1604,8 +1609,8 @@ int ip6_push_pending_frames(struct sock *sk)
 
 	hdr->hop_limit = np->cork.hop_limit;
 	hdr->nexthdr = proto;
-	ipv6_addr_copy(&hdr->saddr, &fl6->saddr);
-	ipv6_addr_copy(&hdr->daddr, final_dst);
+	hdr->saddr = fl6->saddr;
+	hdr->daddr = *final_dst;
 
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;