diff options
| author |   Helge Deller <deller@gmx.de> | 2007-03-16 00:59:29 -0400 |
|---|---|---|
| committer |   Dmitry Torokhov <dtor@insightbb.com> | 2007-03-16 00:59:29 -0400 |
| commit | 9575499dfebc0f0fbbf122223f02e9e92630661d (patch) | |
| tree | d43f958bec192f127907ba393762a0a4728fea4c /drivers/input/serio/hil_mlc.c | |
| parent | Input: add support for PXA27x keyboard controller (diff) | |
| download | linux-dev-9575499dfebc0f0fbbf122223f02e9e92630661d.tar.xz linux-dev-9575499dfebc0f0fbbf122223f02e9e92630661d.zip | |
Input: HIL - fix rwlock recursion bug
The following bug happens when insmoding hp_sdc_mlc.ko:
HP SDC MLC: Registering the System Domain Controller's HIL MLC.
BUG: rwlock recursion on CPU#0, hotplug/1814, 00854734
Backtrace:
[<10267560>] _raw_write_lock+0x50/0x88
[<10104008>] _write_lock_irqsave+0x14/0x24
[<008537d4>] hp_sdc_mlc_out+0x38/0x25c [hp_sdc_mlc]
[<0084ebd8>] hilse_donode+0x308/0x470 [hil_mlc]
[<0084ed80>] hil_mlcs_process+0x40/0x6c [hil_mlc]
[<10130f80>] tasklet_action+0x78/0xb8
[<10130cec>] __do_softirq+0x60/0xcc
[<1010428c>] __lock_text_end+0x38/0x48
[<10108348>] do_cpu_irq_mask+0xf0/0x11c
[<1010b068>] intr_return+0x0/0xc
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/serio/hil_mlc.c')
| -rw-r--r-- | drivers/input/serio/hil_mlc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/input/serio/hil_mlc.c b/drivers/input/serio/hil_mlc.c index 485b0742842b..93a1a6ba216a 100644 --- a/drivers/input/serio/hil_mlc.c +++ b/drivers/input/serio/hil_mlc.c @@ -716,7 +716,9 @@ static int hilse_donode(hil_mlc *mlc) break; case HILSE_CTS: + write_lock_irqsave(&mlc->lock, flags); nextidx = mlc->cts(mlc) ? node->bad : node->good; + write_unlock_irqrestore(&mlc->lock, flags); break; default: |