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    SubjectRe: ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x02000020 DMADBG_7=0x00008040
    On 03/07/2012 09:27 AM, Felix Fietkau wrote:
    > On 2012-03-07 4:24 PM, Justin P. Mattock wrote:
    >> On 03/07/2012 07:19 AM, Mohammed Shafi wrote:
    >>> On Wed, Mar 7, 2012 at 7:55 PM, Justin P. Mattock
    >>> <justinmattock@gmail.com> wrote:
    >>>> ath9k craps out from time to time(more annoying if anything)
    >>>>
    >>>> [44309.840830] ath: Failed to stop TX DMA, queues=0x001!
    >>>> [44309.858246] ath: DMA failed to stop in 10 ms AR_CR=0x00000024
    >>>> AR_DIAG_SW=0x02000020 DMADBG_7=0x00008040
    >>>> [44309.858255] ath: Could not stop RX, we could be confusing the DMA engine
    >>>> when we start RX up
    >>>> [44309.932801] ath: Failed to stop TX DMA, queues=0x001!
    >>>> [44309.950352] ath: DMA failed to stop in 10 ms AR_CR=0x00000024
    >>>> AR_DIAG_SW=0x02000020 DMADBG_7=0x00008040
    >>>> [44309.950361] ath: Could not stop RX, we could be confusing the DMA engine
    >>>> when we start RX up
    >>>> [44310.024301] ath: Failed to stop TX DMA, queues=0x001!
    >>>> [44310.041641] ath: DMA failed to stop in 10 ms AR_CR=0x00000024
    >>>> AR_DIAG_SW=0x02000020 DMADBG_7=0x00008040
    >>>> [44310.041646] ath: Could not stop RX, we could be confusing the DMA engine
    >>>> when we start RX up
    >>>> [44310.116316] ath: Failed to stop TX DMA, queues=0x001!
    >>>> [44310.133909] ath: DMA failed to stop in 10 ms AR_CR=0x00000024
    >>>> AR_DIAG_SW=0x02000020 DMADBG_7=0x00008040
    >>>> [44310.133918] ath: Could not stop RX, we could be confusing the DMA engine
    >>>> when we start RX up
    >>>> [44310.208021] ath: Failed to stop TX DMA, queues=0x001!
    >>>> [44310.225752] ath: DMA failed to stop in 10 ms AR_CR=0x00000024
    >>>> AR_DIAG_SW=0x02000020 DMADBG_7=0x00008040
    >>>> [44310.225761] ath: Could not stop RX, we could be confusing the DMA engine
    >>>> when we start RX up
    >>>> [44310.299922] ath: Failed to stop TX DMA, queues=0x001!
    >>>> [44310.317579] ath: DMA failed to stop in 10 ms AR_CR=0x00000024
    >>>> AR_DIAG_SW=0x02000020 DMADBG_7=0x00006040
    >>>> [44310.317587] ath: Could not stop RX, we could be confusing the DMA engine
    >>>> whe
    >>>
    >>> this is has become a know issue but less harmful, please try to see if
    >>> the workaround of disabling power save helps
    >>>
    >>> iw dev wlanX set power_save off
    >>>
    >>
    >> ok! I have set that on the machine.. will see if I get this message in
    >> the upcoming weeks.
    > Also, please try this patch with powersave enabled:
    > http://nbd.name/ps-fix.patch
    >
    > - Felix
    >

    I will give that a try as well..

    Thanks!

    Justin P. Mattock



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