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    SubjectRe: ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x02000020 DMADBG_7=0x00008040
    On 03/19/2012 11:32 PM, Mohammed Shafi wrote:
    > On Tue, Mar 20, 2012 at 11:57 AM, Justin P. Mattock
    > <justinmattock@gmail.com> wrote:
    >> On 03/19/2012 11:19 PM, Mohammed Shafi wrote:
    >>>>
    >>>> (gdb) list *ath9k_tx+start+0x284
    >>>> No symbol "start" in current context.
    >>>
    >>>
    >>> hey, pls try l *(ath9k_tx_start+0x284), yesterday i did the same in
    >>> the latest wireless testing tree it pointed to line 1929 of xmit.c
    >>>
    >>> sc->tx.seq_no +=0x10;
    >>>
    >>> also did few suspend/resume in my machine, nothing interesting happened
    >>>
    >>>>
    >>>> before receiving the email to do the above code with gdb I had cleaned
    >>>> the
    >>>> tree out with git clean -fx so rebuilding might have misalighned
    >>>> things(but
    >>>> could be wrong)..
    >>>>
    >>>
    >>>
    >>>
    >>
    >>
    >> seems gdb is not working with that code but works if I remove _start.
    >> (maybe -next took this out or something)
    >>
    >> (gdb) l *(ath9k_tx_start+0x284)
    >> No symbol "ath9k_tx_start" in current context.
    >
    > sorry its
    > l *(ath_tx_start+0x284)
    >
    >> (gdb) l *(ath9k_tx+0x284)
    >> 0x4854 is in ath_paprd_activate (drivers/net/wireless/ath/ath9k/main.c:395).
    >> 390 continue;
    >> 391
    >> 392 ar9003_paprd_populate_single_table(ah, caldata,
    >> chain);
    >> 393 }
    >> 394
    >> 395 ar9003_paprd_enable(ah, true);
    >> 396 ath9k_ps_restore(sc);
    >> 397 }
    >> 398
    >> 399 static bool ath_paprd_send_frame(struct ath_softc *sc, struct
    >> sk_buff *skb, int chain)
    >>
    >> right now I am running next, will wait for the RX DMA to get a clean trace,
    >> then will look to see.. as for the other issue I just rebooted and hit this
    >> during bootup.
    >>
    >> Justin P. Mattock
    >
    >
    >

    yeah this works:

    eading symbols from
    /home/kernel/linux-next/drivers/net/wireless/ath/ath9k/ath9k.o...done.
    (gdb) l *(ath_tx_start+0x284)
    0xcad4 is in ath_tx_start (drivers/net/wireless/ath/ath9k/xmit.c:1878).
    1873 ieee80211_is_data_qos(hdr->frame_control)) {
    1874 tidno = ieee80211_get_qos_ctl(hdr)[0] &
    1875 IEEE80211_QOS_CTL_TID_MASK;
    1876 tid = ATH_AN_2_TID(txctl->an, tidno);
    1877
    1878 WARN_ON(tid->ac->txq != txctl->txq);
    1879 }
    1880
    1881 if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
    1882 /*
    (gdb)



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