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linux/drivers
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Andrew Lunn 585b40e25d net: dsa: mv88e6xxx: Fix failed probe due to unsupported C45 reads 
Not all mv88e6xxx device support C45 read/write operations. Those
which do not return -EOPNOTSUPP. However, when phylib scans the bus,
it considers this fatal, and the probe of the MDIO bus fails, which in
term causes the mv88e6xxx probe as a whole to fail.

When there is no device on the bus for a given address, the pull up
resistor on the data line results in the read returning 0xffff. The
phylib core code understands this when scanning for devices on the
bus. C45 allows multiple devices to be supported at one address, so
phylib will perform a few reads at each address, so although thought
not the most efficient solution, it is a way to avoid fatal
errors. Make use of this as a minimal fix for stable to fix the
probing problems.

Follow up patches will rework how C45 operates to make it similar to
C22 which considers -ENODEV as a none-fatal, and swap mv88e6xxx to
using this.

Cc: stable@vger.kernel.org
Fixes: 743a19e38d ("net: dsa: mv88e6xxx: Separate C22 and C45 transactions")
Reported-by: Tim Menninger <tmenninger@purestorage.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20240129224948.1531452-1-andrew@lunn.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-01-31 15:57:07 -08:00
..
accel drm-next for 6.8: 2024-01-12 11:32:19 -08:00
accessibility
acpi cxl for v6.8 2024-01-18 16:22:43 -08:00
amba
android Char/Misc and other Driver changes for 6.8-rc1 2024-01-17 16:47:17 -08:00
ata ata changes for 6.8-rc1 2024-01-11 13:49:00 -08:00
atm net: fill in MODULE_DESCRIPTION()s for ATM 2024-01-05 08:04:23 -08:00
auxdisplay drm-next for 6.8: 2024-01-12 11:32:19 -08:00
base RTC for 6.8 2024-01-18 17:25:39 -08:00
bcma
block rbd: don't move requests to the running list on errors 2024-01-22 00:14:10 +01:00
bluetooth USB / Thunderbolt changes for 6.8-rc1 2024-01-18 11:43:55 -08:00
bus Char/Misc and other Driver changes for 6.8-rc1 2024-01-17 16:47:17 -08:00
cache
cdrom
cdx cdx: Unlock on error path in rescan_store() 2024-01-04 17:01:14 +01:00
char TTY/Serial changes for 6.8-rc1 2024-01-18 11:37:24 -08:00
clk clk: qcom: gcc-x1e80100: Replace of_device.h with explicit includes 2024-01-19 08:17:28 -06:00
clocksource clocksource/drivers/ep93xx: Fix error handling during probe 2023-12-27 15:37:11 +01:00
comedi
connector Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-01-04 18:06:46 -08:00
counter
cpufreq Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-qos' into pm 2024-01-16 12:23:24 +01:00
cpuidle cpuidle: haltpoll: Do not enable interrupts when entering idle 2023-12-29 18:08:18 +01:00
crypto This update includes the following changes: 2024-01-10 12:23:43 -08:00
cxl cxl/core: use sysfs_emit() for attr's _show() 2024-01-12 14:47:04 -08:00
dax New code for 6.8: 2024-01-10 08:45:22 -08:00
dca
devfreq
dio
dma dmaengine fixes for v6.8-rc1 2024-01-20 15:03:25 -08:00
dma-buf
dpll dpll: fix register pin with unregistered parent pin 2024-01-22 11:01:11 +00:00
edac Driver core changes for 6.8-rc1 2024-01-18 09:48:40 -08:00
eisa
extcon
firewire firewire: core: fill model field in modalias of unit device for legacy layout of configuration ROM 2024-01-10 18:37:13 +09:00
firmware Revert "firmware/sysfb: Clear screen_info state after consuming it" 2024-01-19 22:22:26 +01:00
fpga Char/Misc and other Driver changes for 6.8-rc1 2024-01-17 16:47:17 -08:00
fsi
gnss TTY/Serial changes for 6.8-rc1 2024-01-18 11:37:24 -08:00
gpio gpio fixes for v6.8-rc1 2024-01-18 17:03:51 -08:00
gpu drm/ttm: fix ttm pool initialization for no-dma-device drivers 2024-01-22 17:25:46 -08:00
greybus TTY/Serial changes for 6.8-rc1 2024-01-18 11:37:24 -08:00
hid hid-for-linus-2024010801 2024-01-12 14:45:13 -08:00
hsi
hte
hv
hwmon hwmon: (npcm750-pwm-fan) Fix crash observed when instantiating nuvoton,npcm750-pwm-fan 2024-01-14 07:44:38 -08:00
hwspinlock
hwtracing
i2c This cycle, I2C removes the currently unused CLASS_DDC support 2024-01-18 17:29:01 -08:00
i3c i3c: master: cdns: Update maximum prescaler value for i2c clock 2024-01-08 00:51:36 +01:00
idle Power management updates for 6.8-rc1 2024-01-09 16:32:11 -08:00
iio TTY/Serial changes for 6.8-rc1 2024-01-18 11:37:24 -08:00
infiniband RDMA v6.8 merge window 2024-01-12 13:52:21 -08:00
input Input updates for 6.8 merge window: 2024-01-18 17:21:35 -08:00
interconnect Char/Misc and other Driver changes for 6.8-rc1 2024-01-17 16:47:17 -08:00
iommu iommufd for 6.8 2024-01-18 15:28:15 -08:00
ipack TTY/Serial changes for 6.8-rc1 2024-01-18 11:37:24 -08:00
irqchip header cleanups for 6.8 2024-01-10 16:43:55 -08:00
isdn
leds - New Drivers 2024-01-17 15:25:27 -08:00
macintosh
mailbox mediatek: add CMDQ support for mt8188 2024-01-17 15:39:32 -08:00
mcb
md for-6.8/block-2024-01-18 2024-01-18 18:22:40 -08:00
media media: solo6x10: replace max(a, min(b, c)) by clamp(b, a, c) 2024-01-20 13:30:00 -08:00
memory IOMMU Updates for Linux v6.8 2024-01-18 15:16:57 -08:00
memstick
message
mfd TTY/Serial changes for 6.8-rc1 2024-01-18 11:37:24 -08:00
misc This cycle, I2C removes the currently unused CLASS_DDC support 2024-01-18 17:29:01 -08:00
mmc TTY/Serial changes for 6.8-rc1 2024-01-18 11:37:24 -08:00
most
mtd This pull request contains updates for UBI and UBIFS: 2024-01-17 10:27:13 -08:00
mux mux: mmio: use reg property when parent device is not a syscon 2024-01-04 17:01:14 +01:00
net net: dsa: mv88e6xxx: Fix failed probe due to unsupported C45 reads 2024-01-31 15:57:07 -08:00
nfc
ntb
nubus nubus: Make nubus_bus_type static and constant 2024-01-03 13:33:59 +01:00
nvdimm virtio: features, fixes 2024-01-18 16:44:03 -08:00
nvme for-6.8/block-2024-01-18 2024-01-18 18:22:40 -08:00
nvmem Char/Misc and other Driver changes for 6.8-rc1 2024-01-17 16:47:17 -08:00
of IOMMU Updates for Linux v6.8 2024-01-18 15:16:57 -08:00
opp OPP: Rename 'rate_clk_single' 2024-01-05 15:55:41 +05:30
parisc parisc/power: Fix power soft-off button emulation on qemu 2024-01-07 22:59:16 +01:00
parport
pci cxl for v6.8 2024-01-18 16:22:43 -08:00
pcmcia
peci
perf ACPI updates for 6.8-rc1 2024-01-09 16:12:44 -08:00
phy phy-for-6.8 2024-01-18 17:11:43 -08:00
pinctrl This is the main pin control pull request for the v6.8 kernel series. 2024-01-17 15:55:33 -08:00
platform USB / Thunderbolt changes for 6.8-rc1 2024-01-18 11:43:55 -08:00
pmdomain Driver core changes for 6.8-rc1 2024-01-18 09:48:40 -08:00
pnp More ACPI updates for 6.8-rc1 2024-01-17 14:37:40 -08:00
power power: supply: bq24190_charger: Fix "initializer element is not constant" error 2024-01-19 01:03:17 +01:00
powercap
pps
ps3
ptp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-01-04 18:06:46 -08:00
pwm pwm: jz4740: Don't use dev_err_probe() in .request() 2024-01-12 18:25:05 +01:00
rapidio
ras
regulator pwm: Changes for v6.8-rc1 2024-01-12 14:59:50 -08:00
remoteproc
reset SoC: driver updates for 6.8 2024-01-11 11:31:46 -08:00
rpmsg
rtc rtc: nuvoton: Compatible with NCT3015Y-R and NCT3018Y-R 2024-01-18 01:05:33 +01:00
s390 s390 updates for 6.8 merge window part 2 2024-01-18 14:11:25 -08:00
sbus
scsi SCSI misc on 20240120 2024-01-20 09:42:32 -08:00
sh maple: make maple_bus_type static and const 2024-01-04 14:37:17 +01:00
siox
slimbus
soc Char/Misc and other Driver changes for 6.8-rc1 2024-01-17 16:47:17 -08:00
soundwire soundwire updates for 6.7 2024-01-18 17:08:31 -08:00
spi spi: Fix for v6.8 2024-01-19 12:50:09 -08:00
spmi
ssb
staging This cycle, I2C removes the currently unused CLASS_DDC support 2024-01-18 17:29:01 -08:00
target SCSI misc on 20240120 2024-01-20 09:42:32 -08:00
tc
tee Another moderately busy cycle for documentation, including: 2024-01-11 19:46:52 -08:00
thermal thermal: loongson2: Replace of_device.h with explicit includes 2024-01-19 08:08:53 -06:00
thunderbolt USB / Thunderbolt changes for 6.8-rc1 2024-01-18 11:43:55 -08:00
tty RISC-V Patches for the 6.8 Merge Window, Part 4 2024-01-20 11:06:04 -08:00
ufs SCSI misc on 20240120 2024-01-20 09:42:32 -08:00
uio uio: Fix use-after-free in uio_open 2024-01-04 17:03:47 +01:00
usb USB / Thunderbolt changes for 6.8-rc1 2024-01-18 11:43:55 -08:00
vdpa virtio: features, fixes 2024-01-18 16:44:03 -08:00
vfio VFIO updates for v6.8-rc1 2024-01-18 15:57:25 -08:00
vhost virtio: features, fixes 2024-01-18 16:44:03 -08:00
video fbdev: stifb: Fix crash in stifb_blank() 2024-01-23 09:13:24 +01:00
virt Char/Misc and other Driver changes for 6.8-rc1 2024-01-17 16:47:17 -08:00
virtio virtio: features, fixes 2024-01-18 16:44:03 -08:00
w1
watchdog linux-watchdog 6.8-rc1 tag 2024-01-12 13:32:30 -08:00
xen xen: branch for v6.8-rc1 2024-01-17 13:41:38 -08:00
zorro
Kconfig
Makefile fbdev/intelfb: Remove driver 2024-01-12 12:38:37 +01:00