• Helge Deller's avatar
    Input: HIL - fix rwlock recursion bug · 9575499d
    Helge Deller authored
    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: default avatarHelge Deller <deller@gmx.de>
    Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
    9575499d
hp_sdc.h 14 KB