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authorHelge Deller <deller@gmx.de>2007-03-16 00:59:29 -0400
committerDmitry Torokhov <dtor@insightbb.com>2007-03-16 00:59:29 -0400
commit9575499dfebc0f0fbbf122223f02e9e92630661d (patch)
treed43f958bec192f127907ba393762a0a4728fea4c /drivers/input/serio/hil_mlc.c
parent5a90e5bca96696f1daa0bb0a9db299eb40241ada (diff)
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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.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/input/serio/hil_mlc.c b/drivers/input/serio/hil_mlc.c
index 485b074..93a1a6b 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: