linux-kernel - Re: rsi_91x: Failed to read status register on failed authentication

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Date:   Fri, 15 Dec 2017 16:09:19 +0000
From:   Alexey Brodkin <Alexey.Brodkin@...opsys.com>
To:     "amitkarwar@...il.com" <amitkarwar@...il.com>
CC:     "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "amit.karwar@...pinesignals.com" <amit.karwar@...pinesignals.com>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>
Subject: Re: rsi_91x: Failed to read status register on failed authentication

Hi Amitkumar,

On Wed, 2017-12-06 at 12:43 +0530, Amitkumar Karwar wrote:
> On Tue, Dec 5, 2017 at 9:41 PM, Alexey Brodkin
> <Alexey.Brodkin@...opsys.com> wrote:
> > Hi Amit,
> > 
> > I'm seeing quite a strange behavior of RedPine module.
> > It connects perfectly fine to one of access points but fails
> > to connect to another.
> > 
> > Moreover after that failure RSI driver starts to flood me with
> > messages saying:
> > --------------------->8--------------------
> > rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
> > --------------------->8--------------------
> > 
> > Below you may find details of my 2 experiments.
> > Note I use vanilla Linux kernel v4.14.4
> > 
> > Any ideas what could be wrong?
> > 
> 
> Could you enable driver debug zones and share dmesg log for analysis?
> 
> echo 0xffffffff > /sys/kernel/debug/phy0/debug_zone

Please find attached log.
Let me know if you need more details.

-Alexey
View attachment "2017.12.15-redpine.log" of type "text/x-log" (96207 bytes)