On Wed, Mar 2, 2011 at 7:38 PM, Luis R. Rodriguez <mcg...@gmail.com> wrote: > On Wed, Mar 2, 2011 at 4:27 PM, crocket <crockabisc...@gmail.com> wrote: >> What about >> https://lists.ath9k.org/pipermail/ath9k-devel/2011-February/005157.html > > This is a FreeBSD issue, not Linux issue, see: "The problem is RX'ing > packets on the FreeBSD station" > >> https://lists.ath9k.org/pipermail/ath9k-devel/2011-February/005242.html > > "DMA failed to stop" issues are non-fatal and we were not able to find > an easy way to reproduce, we will look into reproducing and fixing > this. In this case the issue is the card even goes deaf on STA mode! > This may be card specific, I haven't had time yet to reproduce. > Anyway, I stand by my statement, any issues found should be reported > just like Bernhard reported his issue and will be looked into.
I see these DMA errors all the time on three different platforms. x86_64 with 2.6.37, compat-wireless from early February, AR9380 with single STA interface: ath: Failed to stop TX DMA in 100 msec after killing last frame ath: Failed to stop TX DMA! On an AR9132 system running compat-wireless from 2011-02-25 (this one with OpenWrt's patches) with a single AP interface, Linux OpenWrt 2.6.37.1 #1 Sun Feb 27 11:48:13 EST 2011 mips GNU/Linux system type : Atheros AR9132 rev 2 machine : TP-LINK TL-WR1043ND My kernel log gets filled with this: ath: Failed to stop TX DMA in 100 msec after killing last frame ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 ath: Could not stop RX, we could be confusing the DMA engine when we start RX up ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 ath: Failed to stop TX DMA in 100 msec after killing last frame ath: Failed to stop TX DMA in 100 msec after killing last frame ath: Failed to stop TX DMA! ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 ath: Could not stop RX, we could be confusing the DMA engine when we start RX up ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 ath: Timeout while waiting for nf to load: AR_PHY_AGC_CONTROL=0x40d22 ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 ath: Could not stop RX, we could be confusing the DMA engine when we start RX up ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 And an IXP425 system running 2.6.32.27 and compat-wireless again from 2010-02-25 with an AR9220 shows much the same thing, in AP or STA mode. If a connection is active and I create a monitor-mode vif, that's almost a sure way to see this on the IXP425 platform. -Brian _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
