Merge tag 'drm-intel-next-2012-04-23' of git://people.freedesktop.org/~danvet/drm-intel into drm-core-next

Daniel Vetter writes:

A new drm-intel-next pull. Highlights:
- More gmbus patches from Daniel Kurtz, I think gmbus is now ready, all
 known issues fixed.
- Fencing cleanup and pipelined fencing removal from Chris.
- rc6 residency interface from Ben, useful for powertop.
- Cleanups and code reorg around the ringbuffer code (Ben&me).
- Use hw semaphores in the pageflip code from Ben.
- More vlv stuff from Jesse, unfortunately his vlv cpu is doa, so less
 merged than I've hoped for - we still have the unused function warning :(
- More hsw patches from Eugeni, again, not yet enabled fully.
- intel_pm.c refactoring from Eugeni.
- Ironlake sprite support from Chris.
- And various smaller improvements/fixes all over the place.

Note that this pull request also contains a backmerge of -rc3 to sort out
a few things in -next. I've also had to frob the shortlog a bit to exclude
anything that -rc3 brings in with this pull.

Regression wise we have a few strange bugs going on, but for all of them
closer inspection revealed that they've been pre-existing, just now
slightly more likely to be hit. And for most of them we have a patch
already. Otherwise QA has not reported any regressions, and I'm also not
aware of anything bad happening in 3.4.

* tag 'drm-intel-next-2012-04-23' of git://people.freedesktop.org/~danvet/drm-intel: (420 commits)
  drm/i915: rc6 residency (fix the fix)
  drm/i915/tv: fix open-coded ARRAY_SIZE.
  drm/i915: invalidate render cache on gen2
  drm/i915: Silence the change of LVDS sync polarity
  drm/i915: add generic power management initialization
  drm/i915: move clock gating functionality into intel_pm module
  drm/i915: move emon functionality into intel_pm module
  drm/i915: move drps, rps and rc6-related functions to intel_pm
  drm/i915: fix line breaks in intel_pm
  drm/i915: move watermarks settings into intel_pm module
  drm/i915: move fbc-related functionality into intel_pm module
  drm/i915: Refactor get_fence() to use the common fence writing routine
  drm/i915: Refactor fence clearing to use the common fence writing routine
  drm/i915: Refactor put_fence() to use the common fence writing routine
  drm/i915: Prepare to consolidate fence writing
  drm/i915: Remove the unsightly "optimisation" from flush_fence()
  drm/i915: Simplify fence finding
  drm/i915: Discard the unused obj->last_fenced_ring
  drm/i915: Remove unused ring->setup_seqno
  drm/i915: Remove fence pipelining
  ...

5 files changed, 25 insertions, 15 deletions

diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index de9da21113a1..cf73cc70ed2d 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -74,16 +74,24 @@ static int ipv4_get_l4proto(const struct sk_buff *skb, unsigned int nhoff,
 
         iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph);
         if (iph == NULL)
-                return -NF_DROP;
+                return -NF_ACCEPT;
 
         /* Conntrack defragments packets, we might still see fragments
          * inside ICMP packets though. */
         if (iph->frag_off & htons(IP_OFFSET))
-                return -NF_DROP;
+                return -NF_ACCEPT;
 
         *dataoff = nhoff + (iph->ihl << 2);
         *protonum = iph->protocol;
 
+        /* Check bogus IP headers */
+        if (*dataoff > skb->len) {
+                pr_debug("nf_conntrack_ipv4: bogus IPv4 packet: "
+                         "nhoff %u, ihl %u, skblen %u\n",
+                         nhoff, iph->ihl << 2, skb->len);
+                return -NF_ACCEPT;
+        }
+
         return NF_ACCEPT;
 }
 
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 5d54ed30e821..8bb6adeb62c0 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -701,11 +701,12 @@ struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp)
         skb = alloc_skb_fclone(size + sk->sk_prot->max_header, gfp);
         if (skb) {
                 if (sk_wmem_schedule(sk, skb->truesize)) {
+                        skb_reserve(skb, sk->sk_prot->max_header);
                         /*
                          * Make sure that we have exactly size bytes
                          * available to the caller, no more, no less.
                          */
-                        skb_reserve(skb, skb_tailroom(skb) - size);
+                        skb->avail_size = size;
                         return skb;
                 }
                 __kfree_skb(skb);
@@ -995,10 +996,9 @@ new_segment:
                                 copy = seglen;
 
                         /* Where to copy to? */
-                        if (skb_tailroom(skb) > 0) {
+                        if (skb_availroom(skb) > 0) {
                                 /* We have some space in skb head. Superb! */
-                                if (copy > skb_tailroom(skb))
-                                        copy = skb_tailroom(skb);
+                                copy = min_t(int, copy, skb_availroom(skb));
                                 err = skb_add_data_nocache(sk, skb, from, copy);
                                 if (err)
                                         goto do_fault;
@@ -1452,7 +1452,7 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
                 if ((available < target) &&
                     (len > sysctl_tcp_dma_copybreak) && !(flags & MSG_PEEK) &&
                     !sysctl_tcp_low_latency &&
-                    dma_find_channel(DMA_MEMCPY)) {
+                    net_dma_find_channel()) {
                         preempt_enable_no_resched();
                         tp->ucopy.pinned_list =
                                         dma_pin_iovec_pages(msg->msg_iov, len);
@@ -1667,7 +1667,7 @@ do_prequeue:
                 if (!(flags & MSG_TRUNC)) {
 #ifdef CONFIG_NET_DMA
                         if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list)
-                                tp->ucopy.dma_chan = dma_find_channel(DMA_MEMCPY);
+                                tp->ucopy.dma_chan = net_dma_find_channel();
 
                         if (tp->ucopy.dma_chan) {
                                 tp->ucopy.dma_cookie = dma_skb_copy_datagram_iovec(
@@ -3302,8 +3302,7 @@ void __init tcp_init(void)
 
         tcp_init_mem(&init_net);
         /* Set per-socket limits to no more than 1/128 the pressure threshold */
-        limit = nr_free_buffer_pages() << (PAGE_SHIFT - 10);
-        limit = max(limit, 128UL);
+        limit = nr_free_buffer_pages() << (PAGE_SHIFT - 7);
         max_share = min(4UL*1024*1024, limit);
 
         sysctl_tcp_wmem[0] = SK_MEM_QUANTUM;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index e886e2f7fa8d..9944c1d9a218 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -474,8 +474,11 @@ static void tcp_rcv_rtt_update(struct tcp_sock *tp, u32 sample, int win_dep)
                 if (!win_dep) {
                         m -= (new_sample >> 3);
                         new_sample += m;
-                } else if (m < new_sample)
-                        new_sample = m << 3;
+                } else {
+                        m <<= 3;
+                        if (m < new_sample)
+                                new_sample = m;
+                }
         } else {
                 /* No previous measure. */
                 new_sample = m << 3;
@@ -5225,7 +5228,7 @@ static int tcp_dma_try_early_copy(struct sock *sk, struct sk_buff *skb,
                 return 0;
 
         if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list)
-                tp->ucopy.dma_chan = dma_find_channel(DMA_MEMCPY);
+                tp->ucopy.dma_chan = net_dma_find_channel();
 
         if (tp->ucopy.dma_chan && skb_csum_unnecessary(skb)) {
 
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 3a25cf743f8b..0cb86ceb652f 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1730,7 +1730,7 @@ process:
 #ifdef CONFIG_NET_DMA
                 struct tcp_sock *tp = tcp_sk(sk);
                 if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list)
-                        tp->ucopy.dma_chan = dma_find_channel(DMA_MEMCPY);
+                        tp->ucopy.dma_chan = net_dma_find_channel();
                 if (tp->ucopy.dma_chan)
                         ret = tcp_v4_do_rcv(sk, skb);
                 else
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 364784a91939..376b2cfbb685 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2060,7 +2060,7 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *to,
                 /* Punt if not enough space exists in the first SKB for
                  * the data in the second
                  */
-                if (skb->len > skb_tailroom(to))
+                if (skb->len > skb_availroom(to))
                         break;
 
                 if (after(TCP_SKB_CB(skb)->end_seq, tcp_wnd_end(tp)))