Guenter Roeck 7c4d21933d i2c: smbus: Improve handling of stuck alerts ... [ Upstream commit 37c526f00bc1c4f847fc800085f8f009d2e11be6 ] The following messages were observed while testing alert functionality on systems with multiple I2C devices on a single bus if alert was active on more than one chip. smbus_alert 3-000c: SMBALERT# from dev 0x0c, flag 0 smbus_alert 3-000c: no driver alert()! and: smbus_alert 3-000c: SMBALERT# from dev 0x28, flag 0 Once it starts, this message repeats forever at high rate. There is no device at any of the reported addresses. Analysis shows that this is seen if multiple devices have the alert pin active. Apparently some devices do not support SMBus arbitration correctly. They keep sending address bits after detecting an address collision and handle the collision not at all or too late. Specifically, address 0x0c is seen with ADT7461A at address 0x4c and ADM1021 at address 0x18 if alert is active on both chips. Address 0x28 is seen with ADT7483 at address 0x2a and ADT7461 at address 0x4c if alert is active on both chips. Once the system is in bad state (alert is set by more than one chip), it often only recovers by power cycling. To reduce the impact of this problem, abort the endless loop in smbus_alert() if the same address is read more than once and not handled by a driver. Fixes: b5527a7766f0 ("i2c: Add SMBus alert support") Signed-off-by: Guenter Roeck <linux@roeck-us.net> [wsa: it also fixed an interrupt storm in one of my experiments] Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> [wsa: rebased, moved a comment as well, improved the 'invalid' value] Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-11-23 23:20:26 +01:00
..
accessibility	speakup: Fix sizeof() vs ARRAY_SIZE() bug	2024-11-19 12:26:51 +01:00
acpi	ACPI: SBS: manage alarm sysfs attribute through psy core	2024-11-23 23:20:23 +01:00
amba
android	binder: fix hang of unregistered readers	2024-11-23 23:20:14 +01:00
ata	ata: libata-core: Fix double free on error	2024-11-19 14:19:34 +01:00
atm
auxdisplay
base	devres: Fix memory leakage caused by driver API devm_free_percpu()	2024-11-23 23:20:19 +01:00
battery
bcma
block	rbd: don't assume RBD_LOCK_STATE_LOCKED for exclusive mappings	2024-11-23 23:20:16 +01:00
bluetooth	Bluetooth: btusb: Add Realtek RTL8852BE support ID 0x13d3:0x3591	2024-11-23 23:20:16 +01:00
bts
bus
cdrom
char	hwrng: amd - Convert PCIBIOS_* return codes to errnos	2024-11-23 23:20:14 +01:00
clk	clk: davinci: da8xx-cfgchip: Initialize clk_init_data before use	2024-11-23 23:20:14 +01:00
clocksource	clocksource/drivers/sh_cmt: Address race condition for clock events	2024-11-23 23:20:23 +01:00
connector
counter	counter: ti-eqep: enable clock at probe	2024-11-19 14:19:33 +01:00
cpufreq	cpufreq: exit() callback is optional	2024-11-19 12:26:54 +01:00
cpuidle	cpuidle: menu: Take negative "sleep length" values into account	2024-11-19 18:01:28 +01:00
crypto	crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak	2024-11-19 12:27:18 +01:00
dax
dca
devfreq	PM / devfreq: Fix buffer overflow in trans_stat_show	2024-11-19 11:32:38 +01:00
dio
dma	dmaengine: ioatdma: Fix missing kmem_cache_destroy()	2024-11-19 14:19:09 +01:00
dma-buf	dma-buf/sync_file: Speed up ioctl by omitting debug names	2024-11-19 17:53:23 +01:00
edac	EDAC, i10nm: make skx_common.o a separate module	2024-11-23 23:19:56 +01:00
eisa
extcon	extcon: max8997: select IRQ_DOMAIN instead of depending on it	2024-11-19 12:27:04 +01:00
fingerprint
firewire	firewire: nosy: ensure user_length is taken into account when fetching packet contents	2024-11-19 11:32:46 +01:00
firmware	firmware: turris-mox-rwtm: Initialize completion before mailbox	2024-11-23 23:20:06 +01:00
fpga	fpga: region: add owner module and take its refcount	2024-11-19 12:27:04 +01:00
fsi
gnss
gpio	gpiolib: cdev: Disallow reconfiguration without direction (uAPI v1)	2024-11-19 14:19:33 +01:00
gpu	drm/amdgpu/pm: Fix the null pointer dereference in apply_state_adjust_rules	2024-11-23 23:20:24 +01:00
greybus	greybus: Fix use-after-free bug in gb_interface_release due to race condition.	2024-11-19 14:19:05 +01:00
gud
hid	HID: wacom: Modify pen IDs	2024-11-23 23:20:20 +01:00
hsi
hv
hwmon	hwmon: (max6697) Fix swapped temp{1,8} critical alarms	2024-11-23 23:19:57 +01:00
hwspinlock
hwtracing	coresight: Fix ref leak when of_coresight_parse_endpoint() fails	2024-11-23 23:20:10 +01:00
i2c	i2c: smbus: Improve handling of stuck alerts	2024-11-23 23:20:26 +01:00
i3c
ide
idle
ifconn
iio	iio: chemical: bme680: Fix sensor data read operation	2024-11-19 14:19:33 +01:00
infiniband	RDMA/iwcm: Fix a use-after-free related to destroying CM IDs	2024-11-23 23:20:15 +01:00
input	Input: elan_i2c - do not leave interrupt disabled on suspend failure	2024-11-23 23:20:10 +01:00
interconnect
iommu	iommu: pcie: Fix incorrect kmemleak_ignore() usage	2024-11-19 17:53:28 +01:00
ipack
irqchip	irqchip/mbigen: Fix mbigen node address layout	2024-11-23 23:20:21 +01:00
isdn	mISDN: Fix a use after free in hfcmulti_tx()	2024-11-23 23:20:17 +01:00
kperfmon
kq/mesh
leds	leds: ss4200: Convert PCIBIOS_* return codes to errnos	2024-11-23 23:20:13 +01:00
lightnvm
macintosh	macintosh/therm_windtunnel: fix module unload.	2024-11-23 23:20:11 +01:00
mailbox	mailbox: imx: fix suspend failue	2024-11-19 11:32:20 +01:00
mcb
md	md/raid5: avoid BUG_ON() while continue reshape after reassembling	2024-11-23 23:20:23 +01:00
media	media: uvcvideo: Fix the bandwdith quirk on USB 3.x	2024-11-23 23:20:24 +01:00
memory
memstick
message
mfd	mfd: omap-usb-tll: Use struct_size to allocate tll	2024-11-23 23:20:09 +01:00
misc	uid_sys_stats: Remove dependency on the profiling subsystem	2024-11-19 17:53:52 +01:00
mmc	mmc: Disable crc check	2024-11-19 17:47:04 +01:00
most
mtd	ubi: eba: properly rollback inside self_check_eba	2024-11-23 23:20:14 +01:00
muic
mux
net	net: fec: Stop PPS on driver remove	2024-11-23 23:20:22 +01:00
nfc	NFC: trf7970a: disable all regulators on removal	2024-11-19 11:32:37 +01:00
ntb
nubus
nvdimm
nvme	nvme-pci: add missing condition check for existence of mapped data	2024-11-23 23:20:18 +01:00
nvmem	nvmem: meson-efuse: Fix return value of nvmem callbacks	2024-11-19 14:19:45 +01:00
of	of: dynamic: Synchronize of_changeset_destroy() with the devlink removals	2024-11-19 09:23:10 +01:00
opp
oprofile
parisc
parport	dev/parport: fix the array out-of-bounds risk	2024-11-23 23:20:14 +01:00
pci	PCI: rockchip: Use GPIOD_OUT_LOW flag while requesting ep_gpio	2024-11-23 23:20:14 +01:00
pcmcia
perf
phy
pinctrl	pinctrl: freescale: mxs: Fix refcount of child	2024-11-23 23:20:11 +01:00
platform	platform/chrome: cros_ec_proto: Lock device when updating MKBP version	2024-11-23 23:20:20 +01:00
pnp
power	power: supply: cros_usbpd: provide ID table for avoiding fallback match	2024-11-19 14:19:07 +01:00
powercap
pps
ps3
ptp	ptp: Fix error message on failed pin verification	2024-11-19 14:19:01 +01:00
pwm	pwm: stm32: Always do lazy disabling	2024-11-23 23:19:56 +01:00
rapidio
ras
regulator	regulator: core: Fix modpost error "regulator_get_regmap" undefined	2024-11-19 14:19:09 +01:00
remoteproc	remoteproc: imx_rproc: Skip over memory region when node value is NULL	2024-11-23 23:20:20 +01:00
reset
rpmsg
rtc	rtc: isl1208: Fix return value of nvmem callbacks	2024-11-23 23:20:15 +01:00
s390	s390/sclp: Prevent release of buffer in I/O	2024-11-23 23:20:24 +01:00
samsung
sbus
scsi	scsi: qla2xxx: validate nvme_local_port correctly	2024-11-23 23:20:15 +01:00
sensorhub
sensors
sfi
sh
siox
slimbus
soc	drivers: soc: xilinx: check return status of get_api_version()	2024-11-23 23:20:19 +01:00
soundwire	soundwire: cadence: fix invalid PDI offset	2024-11-19 12:27:00 +01:00
spi	spi: mux: set ctlr->bits_per_word_mask	2024-11-19 14:19:50 +01:00
spmi
spu_verify
ssb
staging	drivers: staging: Import Xiaomi's binder prio driver	2024-11-19 17:46:55 +01:00
sti
target	target/file: allocate the bvec array as part of struct target_core_file_cmd	2024-11-19 17:42:15 +01:00
tc
tee	tee: optee: Fix kernel panic caused by incorrect error handling	2024-11-19 09:22:39 +01:00
thermal
thunderbolt	thunderbolt: Fix wake configurations after device unplug	2024-11-19 11:32:22 +01:00
tty	serial: 8250_omap: Fix Errata i2310 with RX FIFO level check	2024-11-19 14:19:39 +01:00
uh
uio
usb	USB: core: Fix duplicate endpoint bug by clearing reserved bits in the descriptor	2024-11-19 14:19:45 +01:00
vdpa
vfio	vfio/fsl-mc: Block calling interrupt handler without trigger	2024-11-19 09:22:45 +01:00
vhost	vhost: Add smp_rmb() in vhost_vq_avail_empty()	2024-11-19 11:32:20 +01:00
vibrator
video	Optimized Console FrameBuffer for upto 70% increase in Performance	2024-11-19 17:30:21 +01:00
virt
virtio	virtio: delete vq in vp_find_vqs_msix() when request_irq() fails	2024-11-19 12:27:09 +01:00
vision
vision3
visorbus
vlynq
vme
w1
watchdog	watchdog: rti_wdt: Set min_hw_heartbeat_ms to accommodate a safety margin	2024-11-19 12:27:18 +01:00
xen	xen/events: close evtchn after mapping cleanup	2024-11-19 09:22:39 +01:00
zorro
Kconfig	Added KernelSU	2024-11-19 22:44:48 +01:00
Kconfig.variant1
kernelsu	Added KernelSU	2024-11-19 22:44:48 +01:00
Makefile	Added KernelSU	2024-11-19 22:44:48 +01:00
Makefile.variant1