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5f4d487d01
twx-linux/drivers
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Michael Walle 5f4d487d01 net: phy: mxl-gpy: add MDINT workaround 
At least the GPY215B and GPY215C has a bug where it is still driving the
interrupt line (MDINT) even after the interrupt status register is read
and its bits are cleared. This will cause an interrupt storm.

Although the MDINT is multiplexed with a GPIO pin and theoretically we
could switch the pinmux to GPIO input mode, this isn't possible because
the access to this register will stall exactly as long as the interrupt
line is asserted. We exploit this very fact and just read a random
internal register in our interrupt handler. This way, it will be delayed
until the external interrupt line is released and an interrupt storm is
avoided.

The internal register access via the mailbox was deduced by looking at
the downstream PHY API because the datasheet doesn't mention any of
this.

Fixes: 7d901a1e878a ("net: phy: add Maxlinear GPY115/21x/24x driver")
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20221205200453.3447866-1-michael@walle.cc
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-12-07 20:04:11 -08:00
..
accessibility speakup: replace utils' u_char with unsigned char 2022-11-09 15:25:24 +01:00
acpi platform-drivers-x86 for v6.1-3 2022-11-07 10:19:04 -08:00
amba
android binder: validate alloc->mm in ->mmap() handler 2022-11-09 15:41:27 +01:00
ata ata: libata-core: do not issue non-internal commands once EH is pending 2022-11-12 07:51:06 +09:00
atm
auxdisplay
base ACPI and device properties fixes for 6.1-rc3 2022-10-28 16:48:29 -07:00
bcma Interrupt subsystem updates: 2022-10-12 10:23:24 -07:00
block block-6.1-2022-11-25 2022-11-25 17:50:57 -08:00
bluetooth Bluetooth: btusb: Add debug message for CSR controllers 2022-12-02 13:09:30 -08:00
bus bus: ixp4xx: Don't touch bit 7 on IXP42x 2022-11-22 23:12:18 +01:00
cdrom
char random: use arch_get_random*_early() in random_init() 2022-10-29 00:24:03 +02:00
clk clk: qcom: Update the force mem core bit for GPU clocks 2022-10-27 17:23:29 -07:00
clocksource clocksource/drivers/arm_arch_timer: Fix XGene-1 TVAL register math error 2022-11-21 16:01:56 +01:00
comedi
connector
counter counter: 104-quad-8: Fix race getting function mode and direction 2022-10-23 20:39:26 -04:00
cpufreq cpufreq: amd-pstate: add amd-pstate driver parameter for mode selection 2022-11-22 19:57:15 +01:00
cpuidle RISC-V Patches for the 6.1 Merge Window, Part 1 2022-10-09 13:24:01 -07:00
crypto This update includes the following changes: 2022-10-10 13:04:25 -07:00
cxl cxl/region: Recycle region ids 2022-11-04 16:03:43 -07:00
dax libnvdimm for 6.1 2022-10-14 18:41:41 -07:00
dca
devfreq
dio
dma dmaengine: at_hdmac: Check return code of dma_async_device_register 2022-11-08 10:43:57 +05:30
dma-buf dma-buf: fix racing conflict of dma_heap_add() 2022-11-22 18:27:56 +05:30
edac Merge patch series "Use composable cache instead of L2 cache" 2022-10-13 11:07:13 -07:00
eisa
extcon extcon: usbc-tusb320: Call the Type-C IRQ handler only if a port is registered 2022-11-08 16:45:31 +01:00
firewire
firmware Char/Misc driver fixes for 6.1-rc6 2022-11-18 10:29:25 -08:00
fpga fpga: m10bmc-sec: Fix kconfig dependencies 2022-11-15 21:46:58 +08:00
fsi
gnss
gpio gpio: tegra: Convert to immutable irq chip 2022-10-20 13:47:54 +02:00
gpu Merge tag 'amd-drm-fixes-6.1-2022-11-23' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes 2022-11-25 10:55:23 +10:00
greybus
hid for-linus-2022111101 2022-11-11 09:03:19 -08:00
hsi
hte
hv Drivers: hv: vmbus: fix possible memory leak in vmbus_device_register() 2022-11-21 10:57:42 +00:00
hwmon Revert "hwmon: (pmbus) Add regulator supply into macro" 2022-11-04 16:47:01 -07:00
hwspinlock
hwtracing coresight: cti: Fix hang in cti_disable_hw() 2022-10-25 19:08:07 +02:00
i2c i2c: i801: add lis3lv02d's I2C address for Vostro 5568 2022-11-01 13:46:30 +01:00
i3c i3c: master: Remove the wrong place of reattach. 2022-10-12 23:45:29 +02:00
idle
iio iio: adc: aspeed: Remove the trim valid dts property. 2022-11-14 20:20:08 +00:00
infiniband RDMA/qedr: clean up work queue on failure in qedr_alloc_resources() 2022-10-28 12:59:40 -03:00
input Input updates for v6.1-rc5 2022-11-18 17:56:29 -08:00
interconnect
iommu iommu/vt-d: Set SRE bit only when hardware has SRS cap 2022-11-19 10:46:52 +01:00
ipack Char/Misc and other driver changes for 6.1-rc1 2022-10-08 08:56:37 -07:00
irqchip Interrupt subsystem updates: 2022-10-12 10:23:24 -07:00
isdn mISDN: fix misuse of put_device() in mISDN_register_device() 2022-11-14 10:43:13 +00:00
leds leds: simatic-ipc-leds-gpio: fix incorrect LED to GPIO mapping 2022-10-24 11:32:10 +02:00
macintosh powerpc updates for 6.1 2022-10-09 14:05:15 -07:00
mailbox mailbox: qcom-ipcc: flag IRQ NO_THREAD 2022-10-05 21:51:58 -05:00
mcb
md block-6.1-2022-11-18 2022-11-18 13:59:45 -08:00
media media: vivid: set num_in/outputs to 0 if not supported 2022-10-25 16:43:34 +01:00
memory
memstick
message
mfd Revert "mfd: syscon: Remove repetition of the regmap_get_val_endian()" 2022-10-23 12:04:56 -07:00
misc misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram() 2022-11-09 15:40:03 +01:00
mmc mmc: sdhci-pci: Fix possible memory leak caused by missing pci_dev_put() 2022-11-16 17:00:39 +01:00
most
mtd mtd: onenand: omap2: add dependency on GPMC 2022-11-07 16:53:04 +01:00
mux
net net: phy: mxl-gpy: add MDINT workaround 2022-12-07 20:04:11 -08:00
nfc nfc: st-nci: fix incorrect sizing calculations in EVT_TRANSACTION 2022-11-23 20:01:50 -08:00
ntb
nubus
nvdimm libnvdimm for 6.1 2022-10-14 18:41:41 -07:00
nvme block-6.1-2022-11-18 2022-11-18 13:59:45 -08:00
nvmem nvmem: lan9662-otp: Change return type of lan9662_otp_wait_flag_clear() 2022-11-22 18:22:05 +01:00
of of: property: decrement node refcount in of_fwnode_get_reference_args() 2022-11-22 17:22:52 -06:00
opp
parisc parisc: Export iosapic_serial_irq() symbol for serial port driver 2022-10-27 09:12:05 +02:00
parport parport_pc: Avoid FIFO port location truncation 2022-11-09 15:40:32 +01:00
pci PCI: hv: Only reuse existing IRTE allocation for Multi-MSI 2022-11-12 12:43:59 +00:00
pcmcia
peci
perf arm64 fixes: 2022-10-14 12:38:03 -07:00
phy phy: ralink: mt7621-pci: add sentinel to quirks table 2022-11-05 13:01:25 +05:30
pinctrl pinctrl: mediatek: Export debounce time tables 2022-11-15 09:13:59 +01:00
platform platform-drivers-x86 for v6.1-4 2022-11-16 10:36:13 -08:00
pnp Merge branches 'acpi-apei', 'acpi-wakeup', 'acpi-reboot' and 'acpi-thermal' 2022-10-10 18:11:11 +02:00
power power: supply: ab8500: Defer thermal zone probe 2022-11-01 01:00:32 +01:00
powercap Scheduler changes for v6.1: 2022-10-10 09:10:28 -07:00
pps
ps3
ptp ] ptp: ocp: remove symlink for second GNSS 2022-10-10 08:37:24 +01:00
pwm pwm: Changes for v6.1-rc1 2022-10-07 11:32:10 -07:00
rapidio
ras
regulator regulator: Late fixes for v6.1 2022-11-25 13:54:48 -08:00
remoteproc remoteproc: virtio: Fix warning on bindings by removing the of_match_table 2022-10-05 09:20:44 -06:00
reset Here's the main clk pull request for this merge window. We have some 2022-10-08 10:06:48 -07:00
rpmsg
rtc rtc: cmos: fix build on non-ACPI platforms 2022-10-18 22:36:54 +02:00
s390 block-6.1-2022-11-25 2022-11-25 17:50:57 -08:00
sbus
scsi hyperv-fixes for 6.1-rc7 2022-11-25 12:32:42 -08:00
sh
siox siox: fix possible memory leak in siox_device_add() 2022-11-09 15:40:14 +01:00
slimbus slimbus: qcom-ngd: Fix build error when CONFIG_SLIM_QCOM_NGD_CTRL=y && CONFIG_QCOM_RPROC_COMMON=m 2022-11-10 18:45:40 +01:00
soc soc: imx8m: Enable OCOTP clock before reading the register 2022-11-14 15:52:53 +08:00
soundwire soundwire: qcom: check for outanding writes before doing a read 2022-10-28 17:00:38 +05:30
spi spi: Fixes for v6.1 2022-11-23 11:19:06 -08:00
spmi
ssb
staging Staging driver fix for 6.1-rc6 2022-11-18 12:02:38 -08:00
target scsi: target: tcm_loop: Fix possible name leak in tcm_loop_setup_hba_bus() 2022-11-17 17:46:16 +00:00
tc
tee tee: optee: fix possible memory leak in optee_register_device() 2022-11-17 09:22:12 +01:00
thermal thermal: intel_powerclamp: Use first online CPU as control_cpu 2022-10-15 19:33:57 +02:00
thunderbolt treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
tty TTY/Serial driver fixes for 6.1-rc6 2022-11-18 10:59:52 -08:00
ufs scsi: ufs: core: Fix typo in comment 2022-10-22 03:29:32 +00:00
uio
usb usb: cdnsp: fix issue with ZLP - added TD_SIZE = 1 2022-11-22 16:52:05 +01:00
vdpa virtio: fixes, features 2022-10-10 14:02:53 -07:00
vfio vfio/pci: Check the device set open count on reset 2022-11-10 12:03:36 -07:00
vhost virtio: fixes, features 2022-10-10 14:02:53 -07:00
video Merge tag 'drm-misc-fixes-2022-11-24' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes 2022-11-25 09:21:11 +10:00
virt virt/sev-guest: Prevent IV reuse in the SNP guest driver 2022-11-21 11:03:40 +01:00
virtio virtio_pci: use irq to detect interrupt support 2022-10-13 09:33:03 -04:00
vlynq
w1 Char/Misc and other driver changes for 6.1-rc1 2022-10-08 08:56:37 -07:00
watchdog linux-watchdog 6.1-rc4 tag 2022-11-01 12:21:53 -07:00
xen xen: branch for v6.1-rc6 2022-11-16 10:49:06 -08:00
zorro
Kconfig
Makefile