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    powerpc: Fix vio_bus_probe oops on probe error · cd5aeb9f
    Brian King 提交于
    When CMO is enabled and booted on a non CMO system and the VIO
    device's probe function fails, an oops can result since
    vio_cmo_bus_remove is called when it should not.  This fixes it by
    avoiding the vio_cmo_bus_remove call on platforms that don't implement
    CMO.
    
    cpu 0x0: Vector: 300 (Data Access) at [c00000000e13b3d0]
        pc: c000000000020d34: .vio_cmo_bus_remove+0xc0/0x1f4
        lr: c000000000020ca4: .vio_cmo_bus_remove+0x30/0x1f4
        sp: c00000000e13b650
       msr: 8000000000009032
       dar: 0
     dsisr: 40000000
      current = 0xc00000000e0566c0
      paca    = 0xc0000000006f9b80
        pid   = 2428, comm = modprobe
    enter ? for help
    [c00000000e13b6e0] c000000000021d94 .vio_bus_probe+0x2f8/0x33c
    [c00000000e13b7a0] c00000000029fc88 .driver_probe_device+0x13c/0x200
    [c00000000e13b830] c00000000029fdac .__driver_attach+0x60/0xa4
    [c00000000e13b8c0] c00000000029f050 .bus_for_each_dev+0x80/0xd8
    [c00000000e13b980] c00000000029f9ec .driver_attach+0x28/0x40
    [c00000000e13ba00] c00000000029f630 .bus_add_driver+0xd4/0x284
    [c00000000e13baa0] c0000000002a01bc .driver_register+0xc4/0x198
    [c00000000e13bb50] c00000000002168c .vio_register_driver+0x40/0x5c
    [c00000000e13bbe0] d0000000003b3f1c .ibmvfc_module_init+0x70/0x109c [ibmvfc]
    [c00000000e13bc70] c0000000000acf08 .sys_init_module+0x184c/0x1a10
    [c00000000e13be30] c000000000008748 syscall_exit+0x0/0x40
    Signed-off-by: NBrian King <brking@linux.vnet.ibm.com>
    Signed-off-by: NPaul Mackerras <paulus@samba.org>
    cd5aeb9f
vio.c 41.5 KB