linux-kernel - Re: ATH9 driver issues on ARM64

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Date:   Thu, 8 Dec 2016 18:07:05 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>,
        Bjorn Helgaas <helgaas@...nel.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "Janusz.Dziedzic@...to.com" <Janusz.Dziedzic@...to.com>,
        "rmanohar@....qualcomm.com" <rmanohar@....qualcomm.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "ath9k-devel@....qualcomm.com" <ath9k-devel@....qualcomm.com>
Subject: Re: ATH9 driver issues on ARM64

On 08/12/16 15:29, Bharat Kumar Gogada wrote:

Two things:

> Here is the cat /proc/interrupts (after we do interface up):
> 
> root@:~# ifconfig wlan0 up
> [ 1548.926601] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
> root@...inx-ZCU102-2016_3:~# cat /proc/interrupts 
>            CPU0       CPU1       CPU2       CPU3       
>   1:          0          0          0          0     GICv2  29 Edge      arch_timer
>   2:      19873      20058      19089      17435     GICv2  30 Edge      arch_timer
>  12:          0          0          0          0     GICv2 156 Level     zynqmp-dma
>  13:          0          0          0          0     GICv2 157 Level     zynqmp-dma
>  14:          0          0          0          0     GICv2 158 Level     zynqmp-dma
>  15:          0          0          0          0     GICv2 159 Level     zynqmp-dma
>  16:          0          0          0          0     GICv2 160 Level     zynqmp-dma
>  17:          0          0          0          0     GICv2 161 Level     zynqmp-dma
>  18:          0          0          0          0     GICv2 162 Level     zynqmp-dma
>  19:          0          0          0          0     GICv2 163 Level     zynqmp-dma
>  20:          0          0          0          0     GICv2 164 Level     Mali_GP_MMU, Mali_GP, Mali_PP0_MMU, Mali_PP0, Mali_PP1_MMU, Mali_PP1

I'm not even going to consider looking at something that is running out
of tree code. So please start things with a fresh kernel that doesn't
contain stuff we can't debug.

>  30:          0          0          0          0     GICv2  95 Level     eth0, eth0
> 206:        314          0          0          0     GICv2  49 Level     cdns-i2c
> 207:         40          0          0          0     GICv2  50 Level     cdns-i2c
> 209:          0          0          0          0     GICv2 150 Level     nwl_pcie:misc
> 214:         12          0          0          0     GICv2  47 Level     ff0f0000.spi
> 215:          0          0          0          0     GICv2  58 Level     ffa60000.rtc
> 216:          0          0          0          0     GICv2  59 Level     ffa60000.rtc
> 217:          0          0          0          0     GICv2 165 Level     ahci-ceva[fd0c0000.ahci]
> 218:         61          0          0          0     GICv2  81 Level     mmc0
> 219:          0          0          0          0     GICv2 187 Level     arm-smmu global fault
> 220:        471          0          0          0     GICv2  53 Level     xuartps
> 223:          0          0          0          0     GICv2 154 Level     fd4c0000.dma
> 224:          3          0          0          0     dummy   1 Edge      ath9k

What is this "dummy" controller? And if that's supposed to be a legacy
interrupt from the PCI device, it has the wrong trigger.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...