From: Larry Finger <Larry.Finger@lwfinger.net>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: wireless <linux-wireless@vger.kernel.org>
Subject: Kernel oops in __netif_schedule() for at76c50x-usb
Date: Mon, 02 Jul 2012 10:21:21 -0500 [thread overview]
Message-ID: <4FF1BC71.4070002@lwfinger.net> (raw)
Regarding the oops that I reported for PPC architecture that reported "Unable to
handle kernel paging request for data at address 0x000004c", I have now repeated
it on x86_64 architecture, where the objdump tool is better. The error occurs in
the line in __netif_schedule() that says
if (!test_and_set_bit(__QDISC_STATE_SCHED, &q->state))
Debug printouts have shown that q is not NULL, and it appears to be in the
correct address range. I think q->state is zero; however, q->state cannot be
written.
Additional testing shows this problem to be another side effect of commit
3a25a8c ("mac80211: add improved HW queue control") for a device with only a
single HW queue.
Any suggestions for additional debugging printouts will be greatly appreciated.
Thanks,
Larry
next reply other threads:[~2012-07-02 15:21 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-02 15:21 Larry Finger [this message]
2012-07-02 15:31 ` Kernel oops in __netif_schedule() for at76c50x-usb Johannes Berg
2012-07-02 16:12 ` Larry Finger
2012-07-02 17:38 ` Johannes Berg
2012-07-02 22:50 ` Larry Finger
2012-07-04 9:46 ` Johannes Berg
2012-07-04 10:49 ` Johannes Berg
2012-07-04 10:54 ` Johannes Berg
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