Xenial update: 4.4.208 upstream 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 a mainline/stable Linux tree or
       a minimally backported form of that patch. The following upstream
       stable patches should be included in the Ubuntu kernel:

* btrfs: do not leak reloc root if we fail to read the fs root
* btrfs: handle ENOENT in btrfs_uuid_tree_iterate
* ALSA: hda/ca0132 - Keep power on during processing DSP response
* ALSA: hda/ca0132 - Avoid endless loop
* drm: mst: Fix query_payload ack reply struct
* iio: light: bh1750: Resolve compiler warning and make code more readable
* spi: Add call to spi_slave_abort() function when spidev driver is released
* staging: rtl8188eu: fix possible null dereference
* rtlwifi: prevent memory leak in rtl_usb_probe
* IB/iser: bound protection_sg size by data_sg size
* media: am437x-vpfe: Setting STD to current value is not an error
* media: i2c: ov2659: fix s_stream return value
* media: i2c: ov2659: Fix missing 720p register config
* media: ov6650: Fix stored frame format not in sync with hardware
* tools/power/cpupower: Fix initializer override in hsw_ext_cstates
* usb: renesas_usbhs: add suspend event support in gadget mode
* hwrng: omap3-rom - Call clk_disable_unprepare() on exit only if not idled
* regulator: max8907: Fix the usage of uninitialized variable in max8907_regulator_probe()
* media: flexcop-usb: fix NULL-ptr deref in flexcop_usb_transfer_init()
* samples: pktgen: fix proc_cmd command result check logic
* mwifiex: pcie: Fix memory leak in mwifiex_pcie_init_evt_ring
* media: ti-vpe: vpe: fix a v4l2-compliance warning about invalid pixel format
* media: ti-vpe: vpe: fix a v4l2-compliance failure about frame sequence number
* media: ti-vpe: vpe: Make sure YUYV is set as default format
* extcon: sm5502: Reset registers during initialization
* x86/mm: Use the correct function type for native_set_fixmap()
* perf report: Add warning when libunwind not compiled in
* iio: adc: max1027: Reset the device at probe time
* Bluetooth: hci_core: fix init for HCI_USER_CHANNEL
* drm/gma500: fix memory disclosures due to uninitialized bytes
* x86/ioapic: Prevent inconsistent state when moving an interrupt
* arm64: psci: Reduce the waiting time for cpu_psci_cpu_kill()
* libata: Ensure ata_port probe has completed before detach
* pinctrl: sh-pfc: sh7734: Fix duplicate TCLK1_B
* bnx2x: Fix PF-VF communication over multi-cos queues.
* spi: img-spfi: fix potential double release
* rtlwifi: fix memory leak in rtl92c_set_fw_rsvdpagepkt()
* perf probe: Fix to find range-only function instance
* perf probe: Fix to list probe event with correct line number
* perf probe: Walk function lines in lexical blocks
* perf probe: Fix to probe an inline function which has no entry pc
* perf probe: Fix to show ranges of variables in functions without entry_pc
* perf probe: Fix to show inlined function callsite without entry_pc
* perf probe: Skip overlapped location on searching variables
* perf probe: Return a better scope DIE if there is no best scope
* perf probe: Fix to show calling lines of inlined functions
* perf probe: Skip end-of-sequence and non statement lines
* perf probe: Filter out instances except for inlined subroutine and subprogram
* ath10k: fix get invalid tx rate for Mesh metric
* media: pvrusb2: Fix oops on tear-down when radio support is not present
* media: si470x-i2c: add missed operations in remove
* EDAC/ghes: Fix grain calculation
* spi: pxa2xx: Add missed security checks
* ASoC: rt5677: Mark reg RT5677_PWR_ANLG2 as volatile
* parport: load lowlevel driver if ports not found
* cpufreq: Register drivers only after CPU devices have been registered
* x86/crash: Add a forward declaration of struct kimage
* spi: tegra20-slink: add missed clk_unprepare
* btrfs: don't prematurely free work in end_workqueue_fn()
* iwlwifi: check kasprintf() return value
* fbtft: Make sure string is NULL terminated
* crypto: sun4i-ss - Fix 64-bit size_t warnings on sun4i-ss-hash.c
* crypto: vmx - Avoid weird build failures
* libtraceevent: Fix memory leakage in copy_filter_type
* net: phy: initialise phydev speed and duplex sanely
* Revert "mmc: sdhci: Fix incorrect switch to HS mode"
* usb: xhci: Fix build warning seen with CONFIG_PM=n
* btrfs: do not call synchronize_srcu() in inode_tree_del
* btrfs: return error pointer from alloc_test_extent_buffer
* btrfs: abort transaction after failed inode updates in create_subvol
* Btrfs: fix removal logic of the tree mod log that leads to use-after-free issues
* ALSA: pcm: Avoid possible info leaks from PCM stream buffers
* af_packet: set defaule value for tmo
* fjes: fix missed check in fjes_acpi_add
* mod_devicetable: fix PHY module format
* net: hisilicon: Fix a BUG trigered by wrong bytes_compl
* net: nfc: nci: fix a possible sleep-in-atomic-context bug in nci_uart_tty_receive()
* net: qlogic: Fix error paths in ql_alloc_large_buffers()
* net: usb: lan78xx: Fix suspend/resume PHY register access error
* sctp: fully initialize v4 addr in some functions
* net: dst: Force 4-byte alignment of dst_metrics
* usbip: Fix error path of vhci_recv_ret_submit()
* USB: EHCI: Do not return -EPIPE when hub is disconnected
* platform/x86: hp-wmi: Make buffer for HPWMI_FEATURE2_QUERY 128 bytes
* staging: comedi: gsc_hpdi: check dma_alloc_coherent() return value
* ext4: check for directory entries too close to block end
* powerpc/irq: fix stack overflow verification
* mmc: sdhci-of-esdhc: fix P2020 errata handling
* perf probe: Fix to show function entry line as probe-able
* scsi: mpt3sas: Fix clear pending bit in ioctl status
* scsi: lpfc: Fix locking on mailbox command completion
* Input: atmel_mxt_ts - disable IRQ across suspend
* iommu/tegra-smmu: Fix page tables in > 4 GiB memory
* scsi: target: compare full CHAP_A Algorithm strings
* scsi: lpfc: Fix SLI3 hba in loop mode not discovering devices
* scsi: csiostor: Don't enable IRQs too early
* powerpc/pseries: Mark accumulate_stolen_time() as notrace
* dma-debug: add a schedule point in debug_dma_dump_mappings()
* clocksource/drivers/asm9260: Add a check for of_clk_get
* powerpc/security/book3s64: Report L1TF status in sysfs
* jbd2: Fix statistics for the number of logged blocks
* scsi: tracing: Fix handling of TRANSFER LENGTH == 0 for READ(6) and WRITE(6)
* scsi: lpfc: Fix duplicate unreg_rpi error in port offline flow
* clk: qcom: Allow constant ratio freq tables for rcg
* irqchip/irq-bcm7038-l1: Enable parent IRQ if necessary
* irqchip: ingenic: Error out if IRQ domain creation failed
* fs/quota: handle overflows of sysctl fs.quota.* and report as unsigned long
* scsi: lpfc: fix: Coverity: lpfc_cmpl_els_rsp(): Null pointer dereferences
* scsi: ufs: fix potential bug which ends in system hang
* powerpc/pseries/cmm: Implement release() function for sysfs device
* powerpc/security: Fix wrong message when RFI Flush is disable
* clk: pxa: fix one of the pxa RTC clocks
* bcache: at least try to shrink 1 node in bch_mca_scan()
* HID: Improve Windows Precision Touchpad detection.
* ext4: work around deleting a file with i_nlink == 0 safely
* scsi: pm80xx: Fix for SATA device discovery
* scsi: target: iscsi: Wait for all commands to finish before freeing a session
* gpio: mpc8xxx: Don't overwrite default irq_set_type callback
* scripts/kallsyms: fix definitely-lost memory leak
* cdrom: respect device capabilities during opening action
* perf regs: Make perf_reg_name() return "unknown" instead of NULL
* libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h
* s390/cpum_sf: Check for SDBT and SDB consistency
* ocfs2: fix passing zero to 'PTR_ERR' warning
* kernel: sysctl: make drop_caches write-only
* ALSA: hda - Downgrade error message for single-cmd fallback
* Make filldir[64]() verify the directory entry filename is valid
* filldir[64]: remove WARN_ON_ONCE() for bad directory entries
* net: davinci_cpdma: use dma_addr_t for DMA address
* netfilter: ebtables: compat: reject all padding in matches/watchers
* 6pack,mkiss: fix possible deadlock
* netfilter: bridge: make sure to pull arp header in br_nf_forward_arp()
* net: icmp: fix data-race in cmp_global_allow()
* hrtimer: Annotate lockless access to timer->state
* mmc: sdhci: Update the tuning failed messages to pr_debug level
* tcp: do not send empty skb from tcp_write_xmit()
* Linux 4.4.208
* UBUNTU: upstream stable to v4.4.208

       4.4.208 upstream stable release
       from git://git.kernel.org/