From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pannirselvam Kanagaratnam Date: Mon, 25 Mar 2013 00:26:04 +0800 Subject: [ath9k-devel] WiFi Failure with AR9280 Message-ID: <514F291C.7000801@xsmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org Hello, My WiFi connection drops while running the AR9280 on a Freescale MPC8315E platform in AP mode with hostapd. I get the following error within 15 seconds and the WiFi connection drops. However, I do not observe any issues when using the AR9382. Can you let me know what could be causing this and if there is a workaround for this. I am using Compat-Wireless-3.5.4.1. ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x000062c0 ath: phy0: Could not stop RX, we could be confusing the DMA engine when we start RX up ------------[ cut here ]------------ Badness at /compat-wireless-3.5.4-1/drivers/net/wireless/ath/ath9k/recv.c:531 NIP: c9adabe0 LR: c9adabd4 CTR: c01b8068 REGS: c7b47e30 TRAP: 0700 Not tainted (2.6.35) MSR: 00029032 CR: 22002022 XER: 20000000 TASK = c783db20[916] 'phy0' THREAD: c7b46000 GPR00: 00000001 c7b47ee0 c783db20 0000004c 00005554 ffffffff c01b55d8 00004000 GPR08: 00000000 c9af0000 00005554 c03f4d58 22002082 100b1254 07ff9000 00000000 GPR16: 100a9c50 00000000 00000000 00000000 00000000 00000000 00000000 100a9048 GPR24: 00000000 c7b4a6cc 00000000 00000001 00000001 00000000 c7b49720 c7b4c000 Call Trace: [c7b47ee0] [c9adabd4] 0xc9adabd4 (unreliable) [c7b47f10] [c9ad547c] 0xc9ad547c [c7b47f30] [c9ad5eec] 0xc9ad5eec [c7b47f60] [c9ad64e0] 0xc9ad64e0 [c7b47f80] [c003939c] 0xc003939c [c7b47fc0] [c003d328] 0xc003d328 [c7b47ff0] [c0010f08] 0xc0010f08 Instruction dump: 4082ffac 3c60c9af 3ca0c9af 3863b45c 38a5b590 419eff98 809e0888 3884001c 4beeb431 3d20c9af 8809d59c 68000001 <0f000000> 2f800000 419eff74 38000001 ath: phy0: Failed to stop TX DMA, queues=0x004! ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040 ath: phy0: Could not stop RX, we could be confusing the DMA engine when we start RX up ath: phy0: Failed to stop TX DMA, queues=0x004! ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040 ath: phy0: Could not stop RX, we could be confusing the DMA engine when we start RX up Regards, Pannir