Raring update to 3.8.13.6 stable release

SRU Justification

    Impact:
       The upstream process for stable tree updates is quite similar
       in scope to the Ubuntu SRU process, e.g., each patch has to
       demonstrably fix a bug, and each patch is vetted by upstream
       by originating either directly from Linus' tree or in a minimally
       backported form of that patch. The 3.8.13.6 upstream stable
       patch set is now available. It should be included in the Ubuntu
       kernel as well.

       git://git.kernel.org/

    TEST CASE: TBD

       The following patches are in the 3.8.13.6 stable release:

* Linux 3.8.13.6
* vlan: fix a race in egress prio management
* macvtap: do not zerocopy if iov needs more pages than MAX_SKB_FRAGS
* tuntap: do not zerocopy if iov needs more pages than MAX_SKB_FRAGS
* ipv4: set transport header earlier
* atl1e: unmap partially mapped skb on dma error and free skb
* atl1e: fix dma mapping warnings
* ifb: fix oops when loading the ifb failed
* dummy: fix oops when loading the dummy failed
* 9p: fix off by one causing access violations and memory corruption
* ipv6: in case of link failure remove route directly instead of letting it expire
* macvtap: correctly linearize skb when zerocopy is used
* tuntap: correctly linearize skb when zerocopy is used
* ifb: fix rcu_sched self-detected stalls
* sunvnet: vnet_port_remove must call unregister_netdev
* ipv6: ip6_append_data_mtu did not care about pmtudisc and frag_size
* ipv6: call udp_push_pending_frames when uncorking a socket with AF_INET pending data
* l2tp: add missing .owner to struct pppox_proto
* ipv6,mcast: always hold idev->lock before mca_lock
* vti: remove duplicated code to fix a memory leak
* net: Swap ver and type in pppoe_hdr
* x25: Fix broken locking in ioctl error paths.
* neighbour: fix a race in neigh_destroy()
* sh_eth: fix unhandled RFE interrupt
* af_key: fix info leaks in notify messages
* ipv6: ip6_sk_dst_check() must not assume ipv6 dst
* macvtap: fix recovery from gup errors
* ipv6: don't call addrconf_dst_alloc again when enable lo
* ipv4: Fixed MD5 key lookups when adding/ removing MD5 to/ from TCP sockets.
* bridge: fix switched interval for MLD Query types
* sparc: tsb must be flushed before tlb
* sparc64 address-congruence property
* [PATCH] sparc32: vm_area_struct access for old Sun SPARCs.
* powerpc/modules: Module CRC relocation fix causes perf issues
* drm/i915: fix up gt init sequence fallout
* drm/i915: Serialize almost all register access
* drm/i915: quirk no PCH_PWM_ENABLE for Dell XPS13 backlight
* drm/i915: inverted brightness quirk for Acer Aspire 4736Z
* Btrfs: re-add root to dead root list if we stop dropping it
* Btrfs: fix lock leak when resuming snapshot deletion
* arm64: mm: don't treat user cache maintenance faults as writes
* ACPI / video: ignore BIOS initial backlight value for Fujitsu E753
* drm/i915: fix long-standing SNB regression in power consumption after resume v2
* ALSA: hda - Add new GPU codec ID to snd-hda
* x86, suspend: Handle CPUs which fail to #GP on RDMSR
* staging: line6: Fix unlocked snd_pcm_stop() call
* [media] saa7134: Fix unlocked snd_pcm_stop() call
* ASoC: s6000: Fix unlocked snd_pcm_stop() call
* ASoC: atmel: Fix unlocked snd_pcm_stop() call
* ALSA: pxa2xx: Fix unlocked snd_pcm_stop() call
* ALSA: usx2y: Fix unlocked snd_pcm_stop() call
* ALSA: ua101: Fix unlocked snd_pcm_stop() call
* ALSA: 6fire: Fix unlocked snd_pcm_stop() call
* ALSA: atiixp: Fix unlocked snd_pcm_stop() call
* ALSA: asihpi: Fix unlocked snd_pcm_stop() call
* radeon kms: do not flush uninitialized hotplug work
* ext4: fix error handling in ext4_ext_truncate()
* PM / Sleep: avoid 'autosleep' in shutdown progress
* ACPI / memhotplug: Fix a stale pointer in error path
* drm/radeon: allow selection of alignment in the sub-allocator
* drm/radeon: allocate SA bo in the requested domain
* drm/radeon/hdmi: make sure we have an afmt block assigned
* drm/i915: Preserve the DDI_A_4_LANES bit from the bios
* drm/i915: don't setup hdmi for port D edp in ddi_init
* drm/i915: rename sdvox_reg to hdmi_reg on HDMI context
* Revert "drm/i915: Workaround incoherence between fences and LLC across multiple CPUs"
* drm/i915: Fix incoherence with fence updates on Sandybridge+
* drm/i915: merge {i965, sandybridge}_write_fence_reg()
* drm/i915: Fix write-read race with multiple rings
* Partially revert "drm/i915: unconditionally use mt forcewake on hsw/ivb"
* drm/i915: fix up ring cleanup for the i830/i845 CS tlb w/a
* drm/i915: Correct obj->mm_list link to dev_priv->dev_priv->mm.inactive_list
* ASoC: sglt5000: Fix SGTL5000_PLL_FRAC_DIV_MASK
* ASoC: sglt5000: Fix the default value of CHIP_SSS_CTRL
* xen/blkback: Check device permissions before allowing OP_DISCARD