To: linux-wireless@vger.kernel.org
From: =?UTF-8?Q?Fl=c3=a1vio_Silveira?= <flavioguiraldo@gmail.com>
Subject: ath9k dropping connections
Message-ID: <f5b539a5-5365-7a1d-101d-591b5face78a@gmail.com> (sfid-20171222_011233_205072_B5F0EF0D)
Date: Thu, 21 Dec 2017 22:12:18 -0200
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Sender: linux-wireless-owner@vger.kernel.org

Good evening,

   I have a wireless router running LEDE Reboot (SNAPSHOT, 
r5445-04127f0fec), with kernel 4.9.65 and I'm seeing connections being 
dropped without any error in dmesg. To fix I have to restart wifi by 
issuing "wifi down; wifi up"

   It was previously running OpenWrt Barrier Breaker and was presenting 
the same issue, except it would give me an error similar to this one: 
"ath: phy0: Failed to stop TX DMA, queues=0x005!"

   After doing some research it seems this error is related to 
environment interference and it was fixed in later kernel versions, the 
reason I gave LEDE a try. It makes sense, because this router worked 
wonderfully for at least a year before giving this issue.

   The reason I am sending this e-mail is to receive suggestions on how 
can I debug it properly, because, as pointed above, dmesg shows no errors.

Regards,
   Flavio Silveira