Daniel Mack f434703fb8 serial: sc16is7xx: address RX timeout interrupt errata ... commit 08ce9a1b72e38cf44c300a44ac5858533eb3c860 upstream. This device has a silicon bug that makes it report a timeout interrupt but no data in the FIFO. The datasheet states the following in the errata section 18.1.4: "If the host reads the receive FIFO at the same time as a time-out interrupt condition happens, the host might read 0xCC (time-out) in the Interrupt Indication Register (IIR), but bit 0 of the Line Status Register (LSR) is not set (means there is no data in the receive FIFO)." The errata description seems to indicate it concerns only polled mode of operation when reading bit 0 of the LSR register. However, tests have shown and NXP has confirmed that the RXLVL register also yields 0 when the bug is triggered, and hence the IRQ driven implementation in this driver is equally affected. This bug has hit us on production units and when it does, sc16is7xx_irq() would spin forever because sc16is7xx_port_irq() keeps seeing an interrupt in the IIR register that is not cleared because the driver does not call into sc16is7xx_handle_rx() unless the RXLVL register reports at least one byte in the FIFO. Fix this by always reading one byte from the FIFO when this condition is detected in order to clear the interrupt. This approach was confirmed to be correct by NXP through their support channels. Tested by: Hugo Villeneuve <hvilleneuve@dimonoff.com> Signed-off-by: Daniel Mack <daniel@zonque.org> Co-Developed-by: Maxim Popov <maxim.snafu@gmail.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20231123072818.1394539-1-daniel@zonque.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-12-13 18:39:27 +01:00
..
accessibility
acpi	iommu: Avoid more races around device probe	2023-12-13 18:39:17 +01:00
amba	amba: bus: fix refcount leak	2023-09-13 09:42:56 +02:00
android	binder: fix memory leaks of spam and pending work	2023-12-13 18:39:22 +01:00
ata	scsi: sd: Fix system start for ATA devices	2023-12-08 08:51:14 +01:00
atm	atm: iphase: Do PCI error checks on own line	2023-11-28 17:07:00 +00:00
auxdisplay	auxdisplay: hd44780: move cursor home after clear display command	2023-12-08 08:51:16 +01:00
base	regmap: fix bogus error on regcache_sync success	2023-12-13 18:39:20 +01:00
bcma
block	virtio-blk: fix implicit overflow on virtio_max_dma_size	2023-11-28 17:07:02 +00:00
bluetooth	Bluetooth: btusb: Add 0bda:b85b for Fn-Link RTL8852BE	2023-11-28 17:07:17 +00:00
bus	bus: ti-sysc: Fix SYSC_QUIRK_SWSUP_SIDLE_ACT handling for uart wake-up	2023-10-06 14:56:48 +02:00
cdrom
char	hwrng: geode - fix accessing registers	2023-11-20 11:52:04 +01:00
clk	clk: visconti: Fix undefined behavior bug in struct visconti_pll_provider	2023-11-28 17:07:16 +00:00
clocksource	clocksource/drivers/timer-atmel-tcb: Fix initialization on SAM9 hardware	2023-11-28 17:06:55 +00:00
comedi
connector
counter	counter: microchip-tcb-capture: Fix the use of internal GCLK logic	2023-10-19 23:08:58 +02:00
cpufreq	cpufreq: imx6q: Don't disable 792 Mhz OPP unnecessarily	2023-12-08 08:51:19 +01:00
cpuidle	powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT	2023-09-13 09:42:48 +02:00
crypto	crypto: hisilicon/qm - prevent soft lockup in receive loop	2023-11-28 17:07:00 +00:00
cxl	cxl/port: Fix NULL pointer access in devm_cxl_add_port()	2023-11-28 17:07:23 +00:00
dax
dca
devfreq	PM / devfreq: rockchip-dfi: Make pmu regmap mandatory	2023-11-20 11:51:54 +01:00
dio
dma	dmaengine: stm32-mdma: correct desc prep when channel running	2023-11-28 17:07:13 +00:00
dma-buf	dma-buf: fix check in dma_resv_add_fence	2023-12-08 08:51:15 +01:00
edac	EDAC/igen6: Fix the issue of no error events	2023-09-13 09:42:45 +02:00
eisa
extcon	extcon: cht_wc: add POWER_SUPPLY dependency	2023-09-13 09:42:53 +02:00
firewire	scsi: Change SCSI device boolean fields to single bit flags	2023-12-08 08:51:14 +01:00
firmware	firmware: qcom_scm: use 64-bit calling convention only when client is 64-bit	2023-11-28 17:07:12 +00:00
fpga
fsi	fsi: aspeed: Reset master errors after CFAM reset	2023-09-13 09:42:54 +02:00
gnss
gpio	gpiolib: sysfs: Fix error handling on failed export	2023-12-13 18:39:24 +01:00
gpu	drm/amdgpu: Update EEPROM I2C address for smu v13_0_0	2023-12-13 18:39:26 +01:00
greybus
hid	HID: fix HID device resource race between HID core and debugging support	2023-12-03 07:32:07 +01:00
hsi
hte	hte: tegra: Fix missing error code in tegra_hte_test_probe()	2023-11-20 11:51:58 +01:00
hv	Drivers: hv: vmbus: Don't dereference ACPI root object handle	2023-09-13 09:42:59 +02:00
hwmon	hwmon: (nzxt-kraken2) Fix error handling path in kraken2_probe()	2023-12-13 18:39:14 +01:00
hwspinlock	hwspinlock: qcom: add missing regmap config for SFPB MMIO implementation	2023-09-19 12:28:05 +02:00
hwtracing	hwtracing: hisi_ptt: Add dummy callback pmu::read()	2023-12-13 18:39:22 +01:00
i2c	i2c: designware: Fix corrupted memory seen in the ISR	2023-12-13 18:39:03 +01:00
i3c	i3c: master: svc: fix random hot join failure since timeout error	2023-11-28 17:07:17 +00:00
idle	intel_idle: add Emerald Rapids Xeon support	2023-10-10 22:00:44 +02:00
iio	iio: adc: stm32-adc: harden against NULL pointer deref in stm32_adc_probe()	2023-11-28 17:07:01 +00:00
infiniband	RDMA/irdma: Avoid free the non-cqp_request scratch	2023-12-13 18:39:15 +01:00
input	Input: xpad - add HyperX Clutch Gladiate Support	2023-12-08 08:51:16 +01:00
interconnect	interconnect: qcom: sm8350: Set ACV enable_mask	2023-11-20 11:52:12 +01:00
iommu	iommu: Avoid more races around device probe	2023-12-13 18:39:17 +01:00
ipack
irqchip	irqchip/stm32-exti: add missing DT IRQ flag translation	2023-11-08 14:10:57 +01:00
isdn	mISDN: Update parameter type of dsp_cmx_send()	2023-08-16 18:27:26 +02:00
leds	leds: trigger: ledtrig-cpu:: Fix 'output may be truncated' issue for 'cpu'	2023-11-20 11:52:08 +01:00
macintosh
mailbox	mailbox: qcom-ipcc: fix incorrect num_chans counting	2023-09-19 12:27:58 +02:00
mcb	mcb: fix error handling for different scenarios when parsing	2023-11-28 17:07:13 +00:00
md	md/raid6: use valid sector values to determine if an I/O should wait on the reshape	2023-12-13 18:39:21 +01:00
media	media: qcom: camss: Fix genpd cleanup	2023-12-03 07:32:10 +01:00
memory
memstick
message
mfd	mfd: qcom-spmi-pmic: Fix revid implementation	2023-11-28 17:07:12 +00:00
misc	misc: mei: client.c: fix problem of return '-EOVERFLOW' in mei_cl_write	2023-12-13 18:39:23 +01:00
mmc	mmc: sdhci-sprd: Fix vqmmc not shutting down after the card was pulled	2023-12-08 08:51:19 +01:00
most
mtd	mtd: cfi_cmdset_0001: Byte swap OTP info	2023-11-28 17:07:14 +00:00
mux
net	r8169: fix rtl8125b PAUSE frames blasting when suspended	2023-12-13 18:39:20 +01:00
nfc
ntb	ntb: Fix calculation ntb_transport_tx_free_entry()	2023-09-13 09:43:02 +02:00
nubus
nvdimm	nd_btt: Make BTT lanes preemptible	2023-11-20 11:52:05 +01:00
nvme	nvme-pci: Add sleep quirk for Kingston drives	2023-12-13 18:39:17 +01:00
nvmem	nvmem: imx: correct nregs for i.MX6UL	2023-11-02 09:35:31 +01:00
of	of: dynamic: Fix of_reconfig_get_state_change() return value documentation	2023-12-13 18:39:05 +01:00
opp	OPP: Fix passing 0 to PTR_ERR in _opp_attach_genpd()	2023-09-13 09:42:28 +02:00
parisc	parisc/power: Fix power soft-off when running on qemu	2023-11-28 17:07:14 +00:00
parport	parport: Add support for Brainboxes IX/UC/PX parallel cards	2023-12-13 18:39:26 +01:00
pci	PCI: qcom-ep: Add dedicated callback for writing to DBI2 registers	2023-12-08 08:51:18 +01:00
pcmcia	pcmcia: ds: fix possible name leak in error path in pcmcia_device_add()	2023-11-20 11:52:13 +01:00
peci
perf	perf: hisi: Fix use-after-free when register pmu fails	2023-11-20 11:52:01 +01:00
phy	phy: mapphone-mdm6600: Fix pinctrl_pm handling for sleep pins	2023-10-25 12:03:16 +02:00
pinctrl	pinctrl: avoid reload of p state in list iteration	2023-12-08 08:51:13 +01:00
platform	platform/surface: aggregator: fix recv_buf() return value	2023-12-13 18:39:20 +01:00
pnp
power	power: supply: core: Use blocking_notifier_call_chain to avoid RCU complaint	2023-11-08 14:11:02 +01:00
powercap	powercap: DTPM: Fix missing cpufreq_cpu_put() calls	2023-12-13 18:39:21 +01:00
pps
ps3
ptp	ptp: annotate data-race around q->head and q->tail	2023-11-28 17:07:05 +00:00
pwm	pwm: brcmstb: Utilize appropriate clock APIs in suspend/resume	2023-11-20 11:52:15 +01:00
rapidio
ras
regulator	regulator: mt6358: Fail probe on unknown chip ID	2023-11-20 11:51:56 +01:00
remoteproc
reset
rpmsg	rpmsg: glink: Add check for kstrdup	2023-09-13 09:42:58 +02:00
rtc	rtc: pcf85363: fix wrong mask/val parameters in regmap_update_bits call	2023-11-20 11:52:13 +01:00
s390	s390/dasd: protect device queue against concurrent access	2023-12-03 07:32:11 +01:00
sbus
scsi	scsi: be2iscsi: Fix a memleak in beiscsi_init_wrb_handle()	2023-12-13 18:39:16 +01:00
sh
siox
slimbus
soc	pmdomain: imx: Make imx pgc power domain also set the fwnode	2023-11-28 17:07:16 +00:00
soundwire	soundwire: dmi-quirks: update HP Omen match	2023-11-28 17:07:01 +00:00
spi	spi: Fix null dereference on suspend	2023-12-08 08:51:19 +01:00
spmi
ssb
staging	media: cedrus: Fix clock/reset sequence	2023-11-20 11:52:14 +01:00
target	scsi: target: core: Fix deadlock due to recursive locking	2023-10-10 22:00:41 +02:00
tc
tee	tee: optee: Fix supplicant based device enumeration	2023-12-13 18:39:12 +01:00
thermal	thermal: core: prevent potential string overflow	2023-11-20 11:51:54 +01:00
thunderbolt	thunderbolt: Apply USB 3.x bandwidth quirk only in software connection manager	2023-11-28 17:07:01 +00:00
tty	serial: sc16is7xx: address RX timeout interrupt errata	2023-12-13 18:39:27 +01:00
ufs	scsi: ufs: core: Leave space for '\0' in utf8 desc string	2023-11-20 11:52:07 +01:00
uio
usb	usb: typec: class: fix typec_altmode_put_partner to put plugs	2023-12-13 18:39:27 +01:00
vdpa	vdpa/mlx5: preserve CVQ vringh index	2023-12-13 18:39:03 +01:00
vfio	vfio/mdev: Fix a null-ptr-deref bug for mdev_unregister_parent()	2023-10-06 14:56:45 +02:00
vhost	vhost-vdpa: fix use after free in vhost_vdpa_probe()	2023-11-28 17:07:04 +00:00
video	fbdev: stifb: Make the STI next font pointer a 32-bit signed offset	2023-12-08 08:51:19 +01:00
virt	virt: sevguest: Fix passing a stack buffer as a scatterlist target	2023-11-20 11:52:13 +01:00
virtio	virtio_pci: fix the common cfg map size	2023-11-02 09:35:23 +01:00
vlynq
w1
watchdog	sbsa_gwdt: Calculate timeout with 64-bit math	2023-11-28 17:07:18 +00:00
xen	xen: simplify evtchn_do_upcall() call maze	2023-12-08 08:51:20 +01:00
zorro
Kconfig
Makefile