Merge Linux 4.4.270 kernel

Changes in 4.4.270: (33 commits)
        openrisc: Fix a memory leak
        scsi: qla2xxx: Fix error return code in qla82xx_write_flash_dword()
        ptrace: make ptrace() fail if the tracee changed its pid unexpectedly
        cifs: fix memory leak in smb2_copychunk_range
        ALSA: usb-audio: Validate MS endpoint descriptors
        ALSA: bebob/oxfw: fix Kconfig entry for Mackie d.2 Pro
        Revert "ALSA: sb8: add a check for request_region"
        xen-pciback: reconfigure also from backend watch handler
        dm snapshot: fix crash with transient storage and zero chunk size
        Revert "video: hgafb: fix potential NULL pointer dereference"
        Revert "net: stmicro: fix a missing check of clk_prepare"
        Revert "leds: lp5523: fix a missing check of return value of lp55xx_read"
        Revert "hwmon: (lm80) fix a missing check of bus read in lm80 probe"
        Revert "video: imsttfb: fix potential NULL pointer dereferences"
        Revert "ecryptfs: replace BUG_ON with error handling code"
        Revert "gdrom: fix a memory leak bug"
        cdrom: gdrom: deallocate struct gdrom_unit fields in remove_gdrom
        cdrom: gdrom: initialize global variable at init time
        Revert "rtlwifi: fix a potential NULL pointer dereference"
        Revert "qlcnic: Avoid potential NULL pointer dereference"
        Revert "niu: fix missing checks of niu_pci_eeprom_read"
        ethernet: sun: niu: fix missing checks of niu_pci_eeprom_read()
        net: stmicro: handle clk_prepare() failure during init
        net: rtlwifi: properly check for alloc_workqueue() failure
        leds: lp5523: check return value of lp5xx_read and jump to cleanup code
        qlcnic: Add null check after calling netdev_alloc_skb
        video: hgafb: fix potential NULL pointer dereference
        vgacon: Record video mode changes with VT_RESIZEX
        vt: Fix character height handling with VT_RESIZEX
        tty: vt: always invoke vc->vc_sw->con_resize callback
        video: hgafb: correctly handle card detect failure during probe
        Bluetooth: SMP: Fail if remote and local public keys are identical
        Linux 4.4.270