Bionic update: upstream stable patchset 2021-08-27

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:

       upstream stable patchset 2021-08-27

                Ported from the following upstream stable releases:
                        v4.14.243, v4.19.202
                        v4.14.244, v4.19.203

       from git://git.kernel.org/

btrfs: mark compressed range uptodate only if all bio succeed
regulator: rt5033: Fix n_voltages settings for BUCK and LDO
r8152: Fix potential PM refcount imbalance
qed: fix possible unpaired spin_{un}lock_bh in _qed_mcp_cmd_and_union()
net: Fix zero-copy head len calculation.
Revert "Bluetooth: Shutdown controller after workqueues are flushed or cancelled"
KVM: do not allow mapping valid but non-reference-counted pages
Revert "watchdog: iTCO_wdt: Account for rebooting on second timeout"
spi: mediatek: Fix fifo transfer
padata: validate cpumask without removed CPU during offline
UBUNTU: upstream stable to v4.14.243, v4.19.202
Revert "ACPICA: Fix memory leak caused by _CID repair function"
ALSA: seq: Fix racy deletion of subscriber
clk: stm32f4: fix post divisor setup for I2S/SAI PLLs
omap5-board-common: remove not physically existing vdds_1v8_main fixed-regulator
scsi: sr: Return correct event when media event code is 3
media: videobuf2-core: dequeue if start_streaming fails
net: natsemi: Fix missing pci_disable_device() in probe and remove
nfp: update ethtool reporting of pauseframe control
mips: Fix non-POSIX regexp
bnx2x: fix an error code in bnx2x_nic_load()
net: pegasus: fix uninit-value in get_interrupt_interval
net: fec: fix use-after-free in fec_drv_remove
net: vxge: fix use-after-free in vxge_device_unregister
Bluetooth: defer cleanup of resources in hci_unregister_dev()
USB: usbtmc: Fix RCU stall warning
USB: serial: option: add Telit FD980 composition 0x1056
USB: serial: ch341: fix character loss at high transfer rates
USB: serial: ftdi_sio: add device ID for Auto-M3 OP-COM v2
usb: gadget: f_hid: added GET_IDLE and SET_IDLE handlers
usb: gadget: f_hid: fixed NULL pointer dereference
usb: gadget: f_hid: idle uses the highest byte for duration
usb: otg-fsm: Fix hrtimer list corruption
scripts/tracing: fix the bug that can't parse raw_trace_func
staging: rtl8723bs: Fix a resource leak in sd_int_dpc
media: rtl28xxu: fix zero-length control request
pipe: increase minimum default pipe size to 2 pages
ext4: fix potential htree corruption when growing large_dir directories
serial: 8250: Mask out floating 16/32-bit bus bits
MIPS: Malta: Do not byte-swap accesses to the CBUS UART
pcmcia: i82092: fix a null pointer dereference bug
spi: meson-spicc: fix memory leak in meson_spicc_remove
perf/x86/amd: Don't touch the AMD64_EVENTSEL_HOSTONLY bit inside the guest
qmi_wwan: add network device usage statistics for qmimux devices
libata: fix ata_pio_sector for CONFIG_HIGHMEM
reiserfs: add check for root_inode in reiserfs_fill_super
reiserfs: check directory items on read from disk
alpha: Send stop IPI to send to online CPUs
net/qla3xxx: fix schedule while atomic in ql_wait_for_drvr_lock and ql_adapter_reset
USB:ehci:fix Kunpeng920 ehci hardware problem
ppp: Fix generating ppp unit id when ifname is not specified
ovl: prevent private clone if bind mount is not allowed
net: xilinx_emaclite: Do not print real IOMEM pointer
KVM: x86: accept userspace interrupt only if no event is injected
KVM: x86/mmu: Fix per-cpu counter corruption on 32-bit builds
UBUNTU: upstream stable to v4.14.244, v4.19.203