spidev spi0.0: buggy DT: spidev listed directly in DT
[    0.859396] ------------[ cut here ]------------
[    0.864022] WARNING: CPU: 0 PID: 1 at drivers/spi/spidev.c:718 spidev_probe+0x174/0x1b0()
[    0.872208] Modules linked in:
[    0.875280] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.2.0-rc4-00313-g3f6d9e0-dirty #8
[    0.883287] Hardware name: Allwinner A1X (Device Tree)
[    0.888463] [<c0014dd4>] (unwind_backtrace) from [<c0011ed4>] (show_stack+0x10/0x14)
[    0.896212] [<c0011ed4>] (show_stack) from [<c03faf90>] (dump_stack+0x74/0x90)
[    0.903459] [<c03faf90>] (dump_stack) from [<c00223bc>] (warn_slowpath_common+0x74/0xb0)
[    0.911565] [<c00223bc>] (warn_slowpath_common) from [<c0022414>] (warn_slowpath_null+0x1c/0x24)
[    0.920360] [<c0022414>] (warn_slowpath_null) from [<c02bb0ac>] (spidev_probe+0x174/0x1b0)
[    0.928652] [<c02bb0ac>] (spidev_probe) from [<c02b9610>] (spi_drv_probe+0x5c/0x74)
[    0.936311] [<c02b9610>] (spi_drv_probe) from [<c02639b4>] (driver_probe_device+0x1c8/0x26c)
[    0.944763] [<c02639b4>] (driver_probe_device) from [<c02620b8>] (bus_for_each_drv+0x44/0x8c)
[    0.953301] [<c02620b8>] (bus_for_each_drv) from [<c0263774>] (__device_attach+0x88/0xd8)
[    0.961489] [<c0263774>] (__device_attach) from [<c0262f30>] (bus_probe_device+0x84/0x8c)
[    0.969678] [<c0262f30>] (bus_probe_device) from [<c0261458>] (device_add+0x33c/0x524)
[    0.977605] [<c0261458>] (device_add) from [<c02b9488>] (spi_add_device+0x88/0x130)
[    0.985256] [<c02b9488>] (spi_add_device) from [<c02baa8c>] (spi_register_master+0x538/0x704)
[    0.993789] [<c02baa8c>] (spi_register_master) from [<c02bac84>] (devm_spi_register_master+0x2c/0x68)
[    1.003016] [<c02bac84>] (devm_spi_register_master) from [<c02bbdec>] (sun4i_spi_probe+0x158/0x238)
[    1.012072] [<c02bbdec>] (sun4i_spi_probe) from [<c0264f70>] (platform_drv_probe+0x48/0xa4)
[    1.020433] [<c0264f70>] (platform_drv_probe) from [<c02639b4>] (driver_probe_device+0x1c8/0x26c)
[    1.029315] [<c02639b4>] (driver_probe_device) from [<c0263ae4>] (__driver_attach+0x8c/0x90)
[    1.037762] [<c0263ae4>] (__driver_attach) from [<c0262154>] (bus_for_each_dev+0x54/0x88)
[    1.045934] [<c0262154>] (bus_for_each_dev) from [<c0263110>] (bus_add_driver+0xe4/0x1f0)
[    1.054122] [<c0263110>] (bus_add_driver) from [<c02642d8>] (driver_register+0x78/0xf4)
[    1.062135] [<c02642d8>] (driver_register) from [<c00096a4>] (do_one_initcall+0x80/0x1d0)
[    1.070326] [<c00096a4>] (do_one_initcall) from [<c0567da8>] (kernel_init_freeable+0x11c/0x1e8)
[    1.079037] [<c0567da8>] (kernel_init_freeable) from [<c03f708c>] (kernel_init+0x8/0xec)
[    1.087124] [<c03f708c>] (kernel_init) from [<c000f3a8>] (ret_from_fork+0x14/0x2c)