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[2003:ea:8bf1:e200:cd26:6dfa:b5c4:31f1]) by smtp.googlemail.com with ESMTPSA id h71sm27349458wme.20.2019.02.17.08.41.00 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 17 Feb 2019 08:41:00 -0800 (PST) Subject: Re: No traffic with Marvell switch and latest linux-next From: Heiner Kallweit To: Russell King - ARM Linux admin Cc: Andrew Lunn , Florian Fainelli , "netdev@vger.kernel.org" References: <0907f213-df83-4bb8-8fad-21b1dedaeca5@gmail.com> <20190217154026.tykxexcndx7l5urk@shell.armlinux.org.uk> <291e7622-4402-e58f-503c-ffc7c6b2f055@gmail.com> Message-ID: Date: Sun, 17 Feb 2019 17:40:53 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: <291e7622-4402-e58f-503c-ffc7c6b2f055@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 17.02.2019 16:50, Heiner Kallweit wrote: > On 17.02.2019 16:40, Russell King - ARM Linux admin wrote: >> On Sun, Feb 17, 2019 at 04:34:32PM +0100, Heiner Kallweit wrote: >>> 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. >> >> I have a fix for the trace you have below, but it has nothing to do >> with no traffic. I'll send it out shortly. >> >> Which protocol are you using (ipv4 or ipv6)? Have you setup a >> bridge device containing the ports you wish to switch network >> traffic. Without a bridge device, DSA will by default treat each >> port as a separate port. The other thing that gets people is the >> ethernet interface connected to the DSA switch must be up _before_ >> bringing up any of the switch ports. >> > ipv4, a simple ping. No bridge. Device is connected to a switch > that is always on. > > Technical environment and userspace is always the same, so it seems > to be the kernel version. > There haven't been that many changes to mv88e8xxx since 5.0-rc6. I reverted 7c0db24cc431 ("dsa: mv88e6xxx: Ensure all pending interrupts are handled prior to exit") who looked like a candidate and bingo: network is working again. Obviously something is wrong with this patch. >>> >>> 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: >>> [] 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 >>> >> >