Merge 5.4.218 into android11-5.4-lts

Changes in 5.4.218
	mm: pagewalk: Fix race between unmap and page walker
	perf tools: Fixup get_current_dir_name() compilation
	fs: fix UAF/GPF bug in nilfs_mdt_destroy
	firmware: arm_scmi: Add SCMI PM driver remove routine
	dmaengine: xilinx_dma: cleanup for fetching xlnx,num-fstores property
	dmaengine: xilinx_dma: Report error in case of dma_set_mask_and_coherent API failure
	ARM: dts: fix Moxa SDIO 'compatible', remove 'sdhci' misnomer
	scsi: qedf: Fix a UAF bug in __qedf_probe()
	net/ieee802154: fix uninit value bug in dgram_sendmsg
	um: Cleanup syscall_handler_t cast in syscalls_32.h
	um: Cleanup compiler warning in arch/x86/um/tls_32.c
	arch: um: Mark the stack non-executable to fix a binutils warning
	usb: mon: make mmapped memory read only
	USB: serial: ftdi_sio: fix 300 bps rate for SIO
	mmc: core: Replace with already defined values for readability
	mmc: core: Terminate infinite loop in SD-UHS voltage switch
	rpmsg: qcom: glink: replace strncpy() with strscpy_pad()
	nilfs2: fix NULL pointer dereference at nilfs_bmap_lookup_at_level()
	nilfs2: fix leak of nilfs_root in case of writer thread creation failure
	nilfs2: replace WARN_ONs by nilfs_error for checkpoint acquisition failure
	ceph: don't truncate file in atomic_open
	random: clamp credited irq bits to maximum mixed
	ALSA: hda: Fix position reporting on Poulsbo
	efi: Correct Macmini DMI match in uefi cert quirk
	scsi: stex: Properly zero out the passthrough command structure
	USB: serial: qcserial: add new usb-id for Dell branded EM7455
	random: restore O_NONBLOCK support
	random: avoid reading two cache lines on irq randomness
	random: use expired timer rather than wq for mixing fast pool
	wifi: cfg80211: fix u8 overflow in cfg80211_update_notlisted_nontrans()
	wifi: cfg80211/mac80211: reject bad MBSSID elements
	wifi: cfg80211: ensure length byte is present before access
	wifi: cfg80211: fix BSS refcounting bugs
	wifi: cfg80211: avoid nontransmitted BSS list corruption
	wifi: mac80211_hwsim: avoid mac80211 warning on bad rate
	wifi: cfg80211: update hidden BSSes to avoid WARN_ON
	Input: xpad - add supported devices as contributed on github
	Input: xpad - fix wireless 360 controller breaking after suspend
	Linux 5.4.218

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I181935d163a9900b8e9e1201d3fde0c56b61dc58