From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Smith Date: Wed, 07 Sep 2011 10:59:09 -0400 Subject: [ath9k-devel] Possible over driving AR9106, how to detect? Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org Greetings, I am running into a situation where I believe the RF front-end (AR9106) is being over driven. The configuration being used is a high-gain antenna with an inline LNA attached to a SparkLAN WMIA-199NI. The interface is put into monitor mode and set the fcsfail flag. The interface is brought up and after random periods of time we stop receiving frames. In the past this typically occurred at the same time as the DMA rx stop storm would occur. After all the fixes were put in place we still continued to see the issue. When the lock-up occurs there is no sign of activity on the card (e.g. frame counts, interrupt counts, etc in debugfs do not increase). This lock-up can be cleared by simple changing the channel or cycling the interface down and back up. One factor that seems to trigger this is when we run in the lab where the AP and station are within close proximity resulting in a signal strength of 70dB. I was wondering if there might be an interrupt that I could mask in or some other means to detect if the radio is in fact being over driven. Thanks in advance! V/r, Daniel Smith