From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Qiao Date: Thu, 23 Jan 2014 08:55:03 +0000 Subject: [ath9k-devel] How to solve the problem of "Failed to stop TX DMA" In-Reply-To: <21216.53953.85810.594291@gargle.gargle.HOWL> References: <21215.33088.277915.751120@gargle.gargle.HOWL> <21216.53953.85810.594291@gargle.gargle.HOWL> 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 Sure. Will do and let you know the test result soon. Thanks, -Joe -----Original Message----- From: Sujith Manoharan [mailto:sujith at msujith.org] Sent: Thursday, January 23, 2014 4:29 PM To: Joe Qiao Cc: ath9k-devel at lists.ath9k.org Subject: RE: [ath9k-devel] How to solve the problem of "Failed to stop TX DMA" Joe Qiao wrote: > On powerpc. > > Reproduce rarely, but always can see. > > My step is that, > a). Running hostapd, stop it, and start wpa_supplicant, b). call > SIOCSIWSCAN via ioctl to scan and call SIOCGIWSCAN to get scanning result. > c). stop wpa_supplicant and restart hostapd. Can you use the latest backports release and post the kernel log when the issue happens ? https://www.kernel.org/pub/linux/kernel/projects/backports/2014/01/17/ The ath9k-debug config can be used in backports: make defconfig-ath9k-debug && make && sudo make install Load the driver with debugging enabled: modprobe athk debug=0x7cb Sujith