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Re: [PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5 SoCs

From Benjamin Herrenschmidt <benh@kernel.crashing.org>
Newsgroups linux.kernel
Subject Re: [PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5 SoCs
Date 2016-09-20 14:20 +0200
Message-ID <sjsbL-2RR-3@gated-at.bofh.it> (permalink)
References <sjmSJ-7Pm-3@gated-at.bofh.it> <sjmSJ-7Pm-1@gated-at.bofh.it>
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On Tue, 2016-09-20 at 16:00 +0930, Joel Stanley wrote:
> On Aspeed SoC with a direct PHY connection (non-NSCI), we receive
> continual PHYSTS interrupts:
> 
>  [   20.280000] ftgmac100 1e660000.ethernet eth0: [ISR] = 0x200: PHYSTS_CHG
>  [   20.280000] ftgmac100 1e660000.ethernet eth0: [ISR] = 0x200: PHYSTS_CHG
>  [   20.280000] ftgmac100 1e660000.ethernet eth0: [ISR] = 0x200: PHYSTS_CHG
>  [   20.300000] ftgmac100 1e660000.ethernet eth0: [ISR] = 0x200: PHYSTS_CHG
> 
> This is because the driver was enabling low-level sensitive interrupt
> generation where the systems are wired for high-level. All CPU cycles
> are spent servicing this interrupt.

If this is a system wiring issue, should it be represented by a DT
property ?

Cheers,
Ben.

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[PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5 SoCs Joel Stanley <joel@jms.id.au> - 2016-09-20 08:40 +0200
  Re: [PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5  SoCs Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2016-09-20 14:20 +0200
    Re: [PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5  SoCs Andrew Lunn <andrew@lunn.ch> - 2016-09-20 17:30 +0200
      Re: [PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5 SoCs Joel Stanley <joel@jms.id.au> - 2016-09-21 04:10 +0200
        Re: [PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5  SoCs Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2016-09-21 11:10 +0200
          Re: [PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5 SoCs Joel Stanley <joel@jms.id.au> - 2016-09-21 11:20 +0200
            Re: [PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5  SoCs Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2016-09-21 12:50 +0200
  Re: [PATCH net-next 6/7] net/faraday: Fix phy link irq on Aspeed G5  SoCs Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-09-20 14:20 +0200

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