The AN7531N SoC has currently problems communicating using `phy_mmd_...`
when irqbalance is active. But when there is a communication error in the
interrupt handler, the interrupt will be disabled. This can usually be seen
in the logs as:
irq 53: nobody cared (try booting with the "irqpoll" option)
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G O 6.12.77 #0
Tainted: [O]=OOT_MODULE
Hardware name: Gemtek W1700K (OpenWrt U-Boot layout) (DT)
Call trace:
dump_backtrace.part.0+0xbc/0xcc
show_stack+0x14/0x20
dump_stack_lvl+0x58/0x74
dump_stack+0x14/0x1c
__report_bad_irq+0x48/0xf8
note_interrupt+0x2f4/0x340
handle_irq_event+0xac/0xe0
handle_simple_irq+0xa8/0xfc
handle_irq_desc+0x30/0x54
generic_handle_irq+0x1c/0x24
airoha_irq_handler+0x90/0xe0
__handle_irq_event_percpu+0x44/0x11c
handle_irq_event+0x40/0xe0
handle_fasteoi_irq+0xb4/0x240
handle_irq_desc+0x30/0x54
generic_handle_domain_irq+0x18/0x20
gic_handle_irq+0x60/0xec
do_interrupt_handler+0x4c/0x84
el1_interrupt+0x30/0x4c
el1h_64_irq_handler+0x14/0x1c
el1h_64_irq+0x68/0x6c
handle_softirqs+0x98/0x210
__do_softirq+0x10/0x18
____do_softirq+0xc/0x20
call_on_irq_stack+0x30/0x50
do_softirq_own_stack+0x18/0x20
irq_exit_rcu+0x80/0xb8
el1_interrupt+0x34/0x4c
el1h_64_irq_handler+0x14/0x1c
el1h_64_irq+0x68/0x6c
default_idle_call+0x24/0x34
do_idle+0x98/0xf0
cpu_startup_entry+0x30/0x38
kernel_init+0x0/0x130
console_on_rootfs+0x0/0x64
__primary_switched+0x80/0x88
handlers:
[<000000002b75be58>] irq_default_primary_handler threaded
[<000000006d87ada6>] phy_interrupt
Disabling IRQ #53
This is not a problem with the rtl8261n driver because it is not
registering an interrupt handler. But with the kernel realtek PHY driver, a
interrupt handler is registered which can trigger this problem on bootup.
To avoid is, disable the interrupt and use the PHY polling mode also wit
the upcoming realtek PHY driver support for RTL8261.
Co-authored-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Co-authored-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Daniel Pawlik <pawlik.dan@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/23078
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
07f140f633