netdev - No traffic with Marvell switch and latest linux-next

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Message-ID: <0907f213-df83-4bb8-8fad-21b1dedaeca5@gmail.com>
Date:   Sun, 17 Feb 2019 16:34:32 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: No traffic with Marvell switch and latest linux-next

When testing latest linux-next on the ZII DTU I face the issue that no
traffic is flowing over the switch ports, even though in dmesg
everything looks good. Also PHY properly establishes the link.

With 4.20.10 I don't have the issue and with 5.0-rc6 also not.
However on 5.0-rc6 I got the following, also number of network
interrupts seems to be very high (few minutes after boot).
Any idea what's going on?

Andrew, IIRC you recently fixed some interrupt-related issue:
7ae710f9f8b2 ("gpio: vf610: Mask all GPIO interrupts")
But the description doesn't seem to match this trace.

irq 56: nobody cared (try booting with the "irqpoll" option)
CPU: 0 PID: 577 Comm: irq/38-400d1000 Not tainted 5.0.0-rc6 #1
Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
[<8010c898>] (unwind_backtrace) from [<8010ad98>] (show_stack+0x10/0x14)
[<8010ad98>] (show_stack) from [<80149660>] (__report_bad_irq+0x38/0xb0)
[<80149660>] (__report_bad_irq) from [<80149478>] (note_interrupt+0x10c/0x294)
[<80149478>] (note_interrupt) from [<80149cac>] (handle_nested_irq+0xd8/0xf4)
[<80149cac>] (handle_nested_irq) from [<80384a64>] (mv88e6xxx_g2_irq_thread_fn+0x90/0xc0)
[<80384a64>] (mv88e6xxx_g2_irq_thread_fn) from [<80149c60>] (handle_nested_irq+0x8c/0xf4)
[<80149c60>] (handle_nested_irq) from [<8037ccd0>] (mv88e6xxx_g1_irq_thread_work+0x98/0xcc)
[<8037ccd0>] (mv88e6xxx_g1_irq_thread_work) from [<80147ff4>] (irq_thread_fn+0x1c/0x78)
[<80147ff4>] (irq_thread_fn) from [<80148280>] (irq_thread+0x124/0x1cc)
[<80148280>] (irq_thread) from [<8012f8e8>] (kthread+0x140/0x148)
[<8012f8e8>] (kthread) from [<801010e8>] (ret_from_fork+0x14/0x2c)
Exception stack(0x9f6c7fb0 to 0x9f6c7ff8)
7fa0:                                     00000000 00000000 00000000 00000000
7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
handlers:
[<b09c70df>] irq_default_primary_handler threaded [<44d6803f>] phy_interrupt
Disabling IRQ #56


36:    2030566   mscm-ir  79 Edge      400d1000.ethernet
 38:    1010437  gpio-vf610   2 Level     400d1000.ethernet-1:00
 42:          0  mv88e6xxx-g1   3 Edge      mv88e6xxx-g1-atu-prob
 44:          0  mv88e6xxx-g1   5 Edge      mv88e6xxx-g1-vtu-prob
 46:    1010435  mv88e6xxx-g1   7 Edge      mv88e6xxx-g2
 49:          0  mv88e6xxx-g2   1 Edge      mv88e6xxx-1:01
 53:          0  mv88e6xxx-g2   5 Edge      mv88e6xxx-1:05
 54:          0  mv88e6xxx-g2   6 Edge      mv88e6xxx-1:06
 56:     100000  mv88e6xxx-g2   8 Edge      mv88e6xxx-1:08
 63:          0  mv88e6xxx-g2  15 Edge      mv88e6xxx-watchdog

Heiner