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3d041393ea
linux/drivers
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Oleksij Rempel d0c3601f2c net: macb: Avoid 20s boot delay by skipping MDIO bus registration for fixed-link PHY 
A boot delay was introduced by commit 79540d133e ("net: macb: Fix
handling of fixed-link node"). This delay was caused by the call to
`mdiobus_register()` in cases where a fixed-link PHY was present. The
MDIO bus registration triggered unnecessary PHY address scans, leading
to a 20-second delay due to attempts to detect Clause 45 (C45)
compatible PHYs, despite no MDIO bus being attached.

The commit 79540d133e ("net: macb: Fix handling of fixed-link node")
was originally introduced to fix a regression caused by commit
7897b071ac ("net: macb: convert to phylink"), which caused the driver
to misinterpret fixed-link nodes as PHY nodes. This resulted in warnings
like:
mdio_bus f0028000.ethernet-ffffffff: fixed-link has invalid PHY address
mdio_bus f0028000.ethernet-ffffffff: scan phy fixed-link at address 0
...
mdio_bus f0028000.ethernet-ffffffff: scan phy fixed-link at address 31

This patch reworks the logic to avoid registering and allocation of the
MDIO bus when:
  - The device tree contains a fixed-link node.
  - There is no "mdio" child node in the device tree.

If a child node named "mdio" exists, the MDIO bus will be registered to
support PHYs  attached to the MACB's MDIO bus. Otherwise, with only a
fixed-link, the MDIO bus is skipped.

Tested on a sama5d35 based system with a ksz8863 switch attached to
macb0.

Fixes: 79540d133e ("net: macb: Fix handling of fixed-link node")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: stable@vger.kernel.org
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20241013052916.3115142-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-10-15 10:40:47 -07:00
..
accel dma-mapping updates for linux 6.12 2024-09-19 11:12:49 +02:00
accessibility
acpi cxl fixes for 6.12-rc2 2024-10-05 10:40:16 -07:00
amba
android
ata move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
atm
auxdisplay move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
base move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
bcma
block block-6.12-20241004 2024-10-04 10:43:44 -07:00
bluetooth Bluetooth: btusb: Don't fail external suspend requests 2024-10-04 16:54:25 -04:00
bus Driver core update for 6.12-rc1 2024-09-27 08:48:37 -07:00
cache
cdrom
cdx
char virtio: bugfixes 2024-10-07 11:33:26 -07:00
clk move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
clocksource Updates for x86 timers: 2024-09-17 15:27:01 +02:00
comedi move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
connector
counter move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
cpufreq Power management fixes for 6.12-rc2 2024-10-04 11:57:15 -07:00
cpuidle pmdomain core: 2024-09-18 10:49:45 +02:00
crypto move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
cxl move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
dax device-dax: correct pgoff align in dax_set_mapping() 2024-10-09 12:47:19 -07:00
dca
devfreq
dio
dma soc: convert ep93xx to devicetree 2024-09-26 12:00:25 -07:00
dma-buf drm next for 6.12-rc1 2024-09-19 10:18:15 +02:00
dpll
edac - Drop a now obsolete ppc4xx_edac driver 2024-09-16 06:36:37 +02:00
eisa
extcon Char/Misc and other driver changes for 6.12-rc1 2024-09-26 10:13:08 -07:00
firewire move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
firmware drm fixes for 6.12-rc2 2024-10-04 11:25:14 -07:00
fpga move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
fsi move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
gnss [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
gpio gpiolib: Fix potential NULL pointer dereference in gpiod_get_label() 2024-10-03 20:51:47 +02:00
gpu drm fixes for 6.12-rc2 2024-10-04 11:25:14 -07:00
greybus move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
hid Getting rid of asm/unaligned.h includes 2024-10-02 16:42:28 -07:00
hsi
hte
hv drm next for 6.12-rc1 2024-09-19 10:18:15 +02:00
hwmon move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
hwspinlock
hwtracing [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
i2c i2c-for-6.12-rc2 2024-10-05 10:31:04 -07:00
i3c i3c: master: svc: Fix use after free vulnerability in svc_i3c_master Driver Due to Race Condition 2024-09-17 16:51:45 +02:00
idle intel_idle: fix ACPI _CST matching for newer Xeon platforms 2024-09-25 22:30:33 +02:00
iio move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
infiniband [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
input Getting rid of asm/unaligned.h includes 2024-10-02 16:42:28 -07:00
interconnect
iommu [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
ipack
irqchip Merge tag 'irq-core-2024-09-16' into loongarch-next 2024-09-17 22:20:12 +08:00
isdn move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
leds move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
macintosh move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
mailbox mailbox, remoteproc: omap2+: fix compile testing 2024-09-27 09:11:05 -05:00
mcb
md Getting rid of asm/unaligned.h includes 2024-10-02 16:42:28 -07:00
media move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
memory
memstick move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
message SCSI misc on 20240928 2024-09-29 09:22:34 -07:00
mfd move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
misc misc: sgi-gru: Don't disable preemption in GRU driver 2024-10-09 12:47:01 -07:00
mmc move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
most
mtd move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
mux
net net: macb: Avoid 20s boot delay by skipping MDIO bus registration for fixed-link PHY 2024-10-15 10:40:47 -07:00
nfc move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
ntb ntb: Force physically contiguous allocation of rx ring buffers 2024-09-20 10:51:25 -04:00
nubus
nvdimm virtio: features, fixes, cleanups 2024-09-26 08:43:17 -07:00
nvme move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
nvmem Char/Misc and other driver changes for 6.12-rc1 2024-09-26 10:13:08 -07:00
of Kbuild updates for v6.12 2024-09-24 13:02:06 -07:00
opp
parisc
parport
pci move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
pcmcia move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
peci move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
perf drivers/perf: riscv: Align errno for unsupported perf event 2024-10-01 02:47:39 -07:00
phy phy-for-6.12 2024-09-23 14:05:10 -07:00
pinctrl soc: convert ep93xx to devicetree 2024-09-26 12:00:25 -07:00
platform platform-drivers-x86 for v6.12-2 2024-10-06 11:11:01 -07:00
pmdomain pmdomain: core: Reduce debug summary table width 2024-09-13 13:41:33 +02:00
pnp
power move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
powercap
pps [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
ps3
ptp move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
pwm soc: convert ep93xx to devicetree 2024-09-26 12:00:25 -07:00
rapidio
ras
regulator regulator: sm5703: Remove because it is unused and fails to build 2024-09-13 19:08:14 +01:00
remoteproc mhu-v3, omap2+ : fix kconfig dependencies 2024-09-29 09:53:04 -07:00
reset
rpmsg rpmsg: glink: Avoid -Wflex-array-member-not-at-end warnings 2024-09-13 14:09:47 -07:00
rtc move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
s390 more s390 updates for 6.12 merge window 2024-09-28 09:11:46 -07:00
sbus [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
scsi move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
sh sh: intc: Replace simple_strtoul() with kstrtoul() 2024-09-26 17:25:29 +02:00
siox
slimbus
soc move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
soundwire soundwire updates for 6.12 2024-09-23 14:00:46 -07:00
spi spi: Fixes for v6.12 2024-10-05 10:25:04 -07:00
spmi
ssb
staging move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
target move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
tc
tee
thermal move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
thunderbolt
tty move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
ufs move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
uio
usb move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
vdpa virtio: bugfixes 2024-10-07 11:33:26 -07:00
vfio [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
vhost virtio: bugfixes 2024-10-07 11:33:26 -07:00
video move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
virt [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
virtio virtio: bugfixes 2024-10-07 11:33:26 -07:00
w1
watchdog move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
xen xen: Fix config option reference in XEN_PRIVCMD definition 2024-10-02 16:14:30 +02:00
zorro
Kconfig
Makefile