• Zhang, Yanmin's avatar
    [PATCH] ipmi: use platform_device_add() instead of platform_device_register()... · b48f5457
    Zhang, Yanmin authored
    [PATCH] ipmi: use platform_device_add() instead of platform_device_register() to register device allocated dynamically
    
    I got below warning when running 2.6.19-rc5-mm1 on my ia64 machine.
    
    WARNING at lib/kobject.c:172 kobject_init()
    
    Call Trace:
     [<a0000001000137c0>] show_stack+0x40/0xa0
                                    sp=e0000002ff9f7bc0 bsp=e0000002ff9f0d10
     [<a000000100013850>] dump_stack+0x30/0x60
                                    sp=e0000002ff9f7d90 bsp=e0000002ff9f0cf8
     [<a000000100407bb0>] kobject_init+0x90/0x160
                                    sp=e0000002ff9f7d90 bsp=e0000002ff9f0cd0
     [<a0000001005ae080>] device_initialize+0x40/0x1c0
                                    sp=e0000002ff9f7da0 bsp=e0000002ff9f0cb0
     [<a0000001005b88c0>] platform_device_register+0x20/0x60
                                    sp=e0000002ff9f7dd0 bsp=e0000002ff9f0c90
     [<a000000100592560>] try_smi_init+0xbc0/0x11e0
                                    sp=e0000002ff9f7dd0 bsp=e0000002ff9f0c50
     [<a000000100594900>] init_ipmi_si+0xaa0/0x12e0
                                    sp=e0000002ff9f7de0 bsp=e0000002ff9f0bd8
     [<a000000100009910>] init+0x350/0x780
                                    sp=e0000002ff9f7e00 bsp=e0000002ff9f0ba8
     [<a000000100011d30>] kernel_thread_helper+0x30/0x60
                                    sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80
     [<a0000001000090c0>] start_kernel_thread+0x20/0x40
                                    sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80
    WARNING at lib/kobject.c:172 kobject_init()
    
    Call Trace:
     [<a0000001000137c0>] show_stack+0x40/0xa0
                                    sp=e0000002ff9f7b40 bsp=e0000002ff9f0db0
     [<a000000100013850>] dump_stack+0x30/0x60
                                    sp=e0000002ff9f7d10 bsp=e0000002ff9f0d98
     [<a000000100407bb0>] kobject_init+0x90/0x160
                                    sp=e0000002ff9f7d10 bsp=e0000002ff9f0d70
     [<a0000001005ae080>] device_initialize+0x40/0x1c0
                                    sp=e0000002ff9f7d20 bsp=e0000002ff9f0d50
     [<a0000001005b88c0>] platform_device_register+0x20/0x60
                                    sp=e0000002ff9f7d50 bsp=e0000002ff9f0d30
     [<a00000010058ac00>] ipmi_register_smi+0xcc0/0x18e0
                                    sp=e0000002ff9f7d50 bsp=e0000002ff9f0c90
     [<a000000100592600>] try_smi_init+0xc60/0x11e0
                                    sp=e0000002ff9f7dd0 bsp=e0000002ff9f0c50
     [<a000000100594900>] init_ipmi_si+0xaa0/0x12e0
                                    sp=e0000002ff9f7de0 bsp=e0000002ff9f0bd8
     [<a000000100009910>] init+0x350/0x780
                                    sp=e0000002ff9f7e00 bsp=e0000002ff9f0ba8
     [<a000000100011d30>] kernel_thread_helper+0x30/0x60
                                    sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80
     [<a0000001000090c0>] start_kernel_thread+0x20/0x40
                                    sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80
    
    The root cause is the device struct is initialized twice.
    
    If the device is allocated dynamically by platform_device_alloc,
    platform_device_alloc will initialize struct device, then,
    platform_device_add should be used to register the device.
    
    The difference between platform_device_register and platform_device_add is
    platform_device_register will initiate the device while platform_device_add
    won't.
    Signed-off-by: default avatarZhang Yanmin <yanmin.zhang@intel.com>
    Cc: Corey Minyard <minyard@acm.org>
    Cc: Greg KH <greg@kroah.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    b48f5457
ipmi_msghandler.c 106 KB