linux-kernel - ATH9 driver issues on ARM64

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Date:   Thu, 8 Dec 2016 13:49:42 +0000
From:   Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
CC:     Bjorn Helgaas <helgaas@...nel.org>,
        Marc Zyngier <marc.zyngier@....com>,
        "Janusz.Dziedzic@...to.com" <Janusz.Dziedzic@...to.com>,
        "rmanohar@....qualcomm.com" <rmanohar@....qualcomm.com>
Subject: ATH9 driver issues on ARM64 

Hi,

Did anyone test Atheros ATH9 driver(drivers/net/wireless/ath/ath9k/) on ARM64. 
The end point is TP link wifi card with which supports only legacy interrupts.

We are trying to test it on ARM64 with (drivers/pci/host/pcie-xilinx-nwl.c) as root port.

EP is getting enumerated and able to link up. 

But when we start scan system gets hanged.

When we took trace we see that after we start scan assert message is sent but 
there is no de assert from end point.

What might cause end point not sending de assert ?

We are not seeing any issues on 32-bit ARM platform and X86 platform. 

Regards,
Bharat