Hi Ohad,
While testing the tidspbridge driver (2.6.37-rc5, plus patches from the
dspbridge branch in linux-omap-2.6) I ran into the following lock
inconsistency:
[ 191.045166] =================================
[ 191.051269] [ INFO: inconsistent lock state ]
[ 191.055816] 2.6.37-rc5-00062-gd8b8a63 #8
[ 191.059906] ---------------------------------
[ 191.064453] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
[ 191.070709] dummy/1544 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 191.075988] (&(&mq->lock)->rlock){+.?...}, at: [<bf000744>]
omap_mbox_msg_send+0x18/0xa4 [mailbox]
[ 191.085479] {IN-SOFTIRQ-W} state was registered at:
[ 191.090576] [<c008e914>] __lock_acquire+0x5f0/0x17c4
[ 191.095947] [<c008fbc0>] lock_acquire+0xd8/0xfc
[ 191.100860] [<c0373d3c>] _raw_spin_lock+0x30/0x40
[ 191.105957] [<bf000744>] omap_mbox_msg_send+0x18/0xa4 [mailbox]
[ 191.112335] [<bf014a08>] sm_interrupt_dsp+0xe0/0x114 [bridgedriver]
[ 191.119201] [<bf0122d4>] io_dpc+0x364/0x6c4 [bridgedriver]
[ 191.125152] [<c0067294>] tasklet_action+0x70/0x100
[ 191.130371] [<c0067974>] __do_softirq+0xc4/0x1b4
[ 191.135375] [<c0067b44>] do_softirq+0x44/0x68
[ 191.140136] [<c0067bcc>] run_ksoftirqd+0x64/0x10c
[ 191.145233] [<c007c3a0>] kthread+0x84/0x8c
[ 191.149688] [<c003aad0>] kernel_thread_exit+0x0/0x8
[ 191.154968] irq event stamp: 3602
[ 191.158447] hardirqs last enabled at (3602): [<c0067dd0>]
local_bh_enable_ip+0xe0/0xf4
[ 191.166809] hardirqs last disabled at (3600): [<c0067d50>]
local_bh_enable_ip+0x60/0xf4
[ 191.175170] softirqs last enabled at (3601): [<bf00f848>]
bridge_chnl_add_io_req+0x2f4/0x348 [bridgedriver]
[ 191.185485] softirqs last disabled at (3599): [<c0373f24>]
_raw_spin_lock_bh+0x14/0x4c
[ 191.193756]
[ 191.193756] other info that might help us debug this:
[ 191.200592] 1 lock held by dummy/1544:
[ 191.204498] #0: (&node_mgr_obj->node_mgr_lock){+.+.+.}, at: [<bf025da0>]
node_create+0x88/0x28c [bridgedriver]
[ 191.215240]
[ 191.215240] stack backtrace:
[ 191.219818] [<c003eca4>] (unwind_backtrace+0x0/0xec) from [<c008caf4>]
(print_usage_bug+0x170/0x1b4)
[ 191.229370] [<c008caf4>] (print_usage_bug+0x170/0x1b4) from [<c008ce90>]
(mark_lock+0x358/0x628)
[ 191.238555] [<c008ce90>] (mark_lock+0x358/0x628) from [<c008e9a0>]
(__lock_acquire+0x67c/0x17c4)
[ 191.247741] [<c008e9a0>] (__lock_acquire+0x67c/0x17c4) from [<c008fbc0>]
(lock_acquire+0xd8/0xfc)
[ 191.257019] [<c008fbc0>] (lock_acquire+0xd8/0xfc) from [<c0373d3c>]
(_raw_spin_lock+0x30/0x40)
[ 191.266021] [<c0373d3c>] (_raw_spin_lock+0x30/0x40) from [<bf000744>]
(omap_mbox_msg_send+0x18/0xa4 [mailbox])
[ 191.276519] [<bf000744>] (omap_mbox_msg_send+0x18/0xa4 [mailbox]) from
[<bf014a08>] (sm_interrupt_dsp+0xe0/0x114 [bridgedriver])
[ 191.288696] [<bf014a08>] (sm_interrupt_dsp+0xe0/0x114 [bridgedriver]) from
[<bf00f85c>] (bridge_chnl_add_io_req+0x308/0x348 [bridgedriver])
[ 191.301910] [<bf00f85c>] (bridge_chnl_add_io_req+0x308/0x348
[bridgedriver]) from [<bf021694>] (send_message+0x14c/0x164 [bridgedriver])
[ 191.314880] [<bf021694>] (send_message+0x14c/0x164 [bridgedriver]) from
[<bf021f18>] (disp_node_create+0x4c8/0x508 [bridgedriver])
[ 191.327301] [<bf021f18>] (disp_node_create+0x4c8/0x508 [bridgedriver]) from
[<bf025ea8>] (node_create+0x190/0x28c [bridgedriver])
[ 191.339630] [<bf025ea8>] (node_create+0x190/0x28c [bridgedriver]) from
[<bf019018>] (api_call_dev_ioctl+0xf0/0x118 [bridgedriver])
[ 191.352081] [<bf019018>] (api_call_dev_ioctl+0xf0/0x118 [bridgedriver])
from [<bf02e0dc>] (bridge_ioctl+0x148/0x17c [bridgedriver])
[ 191.364532] [<bf02e0dc>] (bridge_ioctl+0x148/0x17c [bridgedriver]) from
[<c00f5870>] (vfs_ioctl+0x20/0x3c)
[ 191.374633] [<c00f5870>] (vfs_ioctl+0x20/0x3c) from [<c00f5f5c>]
(do_vfs_ioctl+0x4fc/0x544)
[ 191.383361] [<c00f5f5c>] (do_vfs_ioctl+0x4fc/0x544) from [<c00f5ff0>]
(sys_ioctl+0x4c/0x6c)
[ 191.392089] [<c00f5ff0>] (sys_ioctl+0x4c/0x6c) from [<c003a0c0>]
(ret_fast_syscall+0x0/0x3c)
Googling for a solution returned a pretty long mail thread (http://www.mail-
archive.com/linux-omap@xxxxxxxxxxxxxxx/msg30492.html) and a dspbridge patch
(https://patchwork.kernel.org/patch/107522/) part of a bigger patch set.
That code doesn't seem to have hit mainline. Do you have a status update on
this ?
--
Regards,
Laurent Pinchart
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