From mboxrd@z Thu Jan  1 00:00:00 1970
From: lastnoname <lastnoname@163.com>
Date: Mon, 25 Jun 2012 22:30:57 +0800
Subject: [ath9k-devel] TXURN interrupt
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Hi every body!
In ath9k defines a tx under run interrupt:
 #define AR_ISR_TXURN         0x00000800
but what does such interrupt mean? The driver doesnt't use it, When will it happen? Thanks all!