From: Johannes Berg <johannes@sipsolutions.net>
To: Ivo van Doorn <ivdoorn@gmail.com>, netdev <netdev@vger.kernel.org>
Subject: lockdep rt2500usb report
Date: Fri, 11 Aug 2006 10:34:24 +0200 [thread overview]
Message-ID: <44DC4110.6080300@sipsolutions.net> (raw)
This is running wireless-dev from yesterday. All I did was plug in a
rt2500usb device into a usb port on a freshly booted system. I have a
feeling that this is could be one of the problems reported earlier with
the d80211 stack, but I haven't mastered the art of picking through
these traces yet... What's swapper doing in there?
[ 1806.889513] usb 5-2: new high speed USB device using ehci_hcd and
address 2
[ 1807.164838] usb 5-2: configuration #1 chosen from 1 choice
[ 1807.252880] Loading module: rt2500usb - CVS (N/A) by
http://rt2x00.serialmonkey.com.
[ 1807.338966] wmaster0: Selected rate control algorithm 'simple'
[ 1807.364971] usbcore: registered new driver rt2500usb
[ 1807.658580]
[ 1807.658582] =======================================================
[ 1807.658586] [ INFO: possible circular locking dependency detected ]
[ 1807.658588] -------------------------------------------------------
[ 1807.658591] swapper/0 is trying to acquire lock:
[ 1807.658593] (&dev->queue_lock){-+..}, at: [<c0297518>]
dev_queue_xmit+0x52/0 x24f
[ 1807.658603]
[ 1807.658604] but task is already holding lock:
[ 1807.658606] (&dev->_xmit_lock){-+..}, at: [<c02976b4>]
dev_queue_xmit+0x1ee/ 0x24f
[ 1807.658611]
[ 1807.658612] which lock already depends on the new lock.
[ 1807.658613]
[ 1807.658615]
[ 1807.658616] the existing dependency chain (in reverse order) is:
[ 1807.658618]
[ 1807.658619] -> #1 (&dev->_xmit_lock){-+..}:
[ 1807.658622] [<c01322b7>] lock_acquire+0x5c/0x79
[ 1807.658631] [<c02f5560>] _spin_lock_bh+0x3b/0x48
[ 1807.658639] [<c02a3231>] dev_activate+0x5e/0x10f
[ 1807.658646] [<c0295c89>] dev_open+0x5c/0x73
[ 1807.658652] [<c029538f>] dev_change_flags+0x51/0x107
[ 1807.658659] [<c029e60a>] do_setlink+0x182/0x378
[ 1807.658665] [<c029dac2>] rtnetlink_rcv_msg+0x163/0x214
[ 1807.658671] [<c02a5b9e>] netlink_run_queue+0x83/0x114
[ 1807.658678] [<c029d833>] rtnetlink_rcv+0x2c/0x49
[ 1807.658684] [<c02a5c44>] netlink_data_ready+0x15/0x59
[ 1807.658691] [<c02a3893>] netlink_sendskb+0x1f/0x36
[ 1807.658697] [<c02a5673>] netlink_unicast+0x190/0x1f2
[ 1807.658703] [<c02a588f>] netlink_sendmsg+0x1ba/0x29d
[ 1807.658709] [<c028cb46>] sock_sendmsg+0xcf/0xf3
[ 1807.658717] [<c028cc60>] sys_sendmsg+0xf6/0x1fb
[ 1807.658723] [<c028d4af>] sys_socketcall+0x232/0x253
[ 1807.658729] [<c0102ead>] sysenter_past_esp+0x56/0x8d
[ 1807.658737]
[ 1807.658737] -> #0 (&dev->queue_lock){-+..}:
[ 1807.658740] [<c01322b7>] lock_acquire+0x5c/0x79
[ 1807.658748] [<c02f5763>] _spin_lock+0x36/0x43
[ 1807.658754] [<c0297518>] dev_queue_xmit+0x52/0x24f
[ 1807.658760] [<e2cb2aff>]
ieee80211_subif_start_xmit+0x299/0x49f [80211 ]
[ 1807.658777] [<c02973d9>] dev_hard_start_xmit+0x15f/0x24c
[ 1807.658783] [<c02976cd>] dev_queue_xmit+0x207/0x24f
[ 1807.658789] [<e351b8a4>] mld_sendpack+0x228/0x29f [ipv6]
[ 1807.658812] [<e351bf49>] mld_ifc_timer_expire+0x217/0x260 [ipv6]
[ 1807.658829] [<c0121a6d>] run_timer_softirq+0xbf/0x1ae
[ 1807.658836] [<c011e30c>] __do_softirq+0x50/0xc1
[ 1807.658844] [<c011e3c6>] do_softirq+0x49/0x4b
[ 1807.658849] [<c011e50f>] irq_exit+0x42/0x44
[ 1807.658855] [<c01055d4>] do_IRQ+0x3c/0x78
[ 1807.658861] [<c01039cd>] common_interrupt+0x25/0x2c
[ 1807.658867] [<c0101c27>] cpu_idle+0x41/0x69
[ 1807.658873] [<c0100295>] rest_init+0x39/0x3b
[ 1807.658878] [<c03ee718>] start_kernel+0x2a6/0x31e
[ 1807.658885] [<c0100199>] 0xc0100199
[ 1807.658894]
[ 1807.658894] other info that might help us debug this:
[ 1807.658895]
[ 1807.658898] 1 lock held by swapper/0:
[ 1807.658899] #0: (&dev->_xmit_lock){-+..}, at: [<c02976b4>]
dev_queue_xmit+0 x1ee/0x24f
[ 1807.658905]
[ 1807.658906] stack backtrace:
[ 1807.658908] [<c01053a0>] show_trace+0x12/0x14
[ 1807.658911] [<c01053bb>] dump_stack+0x19/0x1e
[ 1807.658914] [<c01300f4>] print_circular_bug_tail+0x5d/0x66
[ 1807.658918] [<c0131d9c>] __lock_acquire+0xb89/0xd8a
[ 1807.658921] [<c01322b7>] lock_acquire+0x5c/0x79
[ 1807.658925] [<c02f5763>] _spin_lock+0x36/0x43
[ 1807.658928] [<c0297518>] dev_queue_xmit+0x52/0x24f
[ 1807.658931] [<e2cb2aff>] ieee80211_subif_start_xmit+0x299/0x49f [80211]
[ 1807.658942] [<c02973d9>] dev_hard_start_xmit+0x15f/0x24c
[ 1807.658946] [<c02976cd>] dev_queue_xmit+0x207/0x24f
[ 1807.658949] [<e351b8a4>] mld_sendpack+0x228/0x29f [ipv6]
[ 1807.658964] [<e351bf49>] mld_ifc_timer_expire+0x217/0x260 [ipv6]
[ 1807.658979] [<c0121a6d>] run_timer_softirq+0xbf/0x1ae
[ 1807.658982] [<c011e30c>] __do_softirq+0x50/0xc1
[ 1807.658986] [<c011e3c6>] do_softirq+0x49/0x4b
[ 1807.658989] [<c011e50f>] irq_exit+0x42/0x44
[ 1807.658992] [<c01055d4>] do_IRQ+0x3c/0x78
[ 1807.658995] [<c01039cd>] common_interrupt+0x25/0x2c
[ 1807.658998] [<c0101c27>] cpu_idle+0x41/0x69
[ 1807.659001] [<c0100295>] rest_init+0x39/0x3b
[ 1807.659004] [<c03ee718>] start_kernel+0x2a6/0x31e
[ 1807.659007] [<c0100199>] 0xc0100199
next reply other threads:[~2006-08-11 8:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-11 8:34 Johannes Berg [this message]
2006-08-11 17:43 ` lockdep rt2500usb report Ivo van Doorn
2006-08-26 9:26 ` Ivo van Doorn
2006-08-27 5:14 ` Michael Wu
2006-08-27 7:17 ` Ivo van Doorn
2006-08-27 8:10 ` Michael Wu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=44DC4110.6080300@sipsolutions.net \
--to=johannes@sipsolutions.net \
--cc=ivdoorn@gmail.com \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.