[BUG 4.17] reloading etnaviv module causes kernel warning

[Russell King - ARM Linux]

When removing and reloading the etnaviv module, the following splat
occurs:

sysfs: cannot create duplicate filename '/devices/platform/etnaviv'
CPU: 0 PID: 1471 Comm: modprobe Not tainted 4.17.0+ #1608
Hardware name: Marvell Dove (Cubox)
Backtrace:
[<c00157d4>] (dump_backtrace) from [<c0015b8c>] (show_stack+0x18/0x1c)
 r6:ef033e38 r5:ee07b340 r4:edb9d000 r3:00000000
[<c0015b74>] (show_stack) from [<c0620784>] (dump_stack+0x20/0x28)
[<c0620764>] (dump_stack) from [<c01bcd24>] (sysfs_warn_dup+0x5c/0x70)
[<c01bccc8>] (sysfs_warn_dup) from [<c01bce14>] (sysfs_create_dir_ns+0x90/0x98)
 r6:ffffffef r5:ef033e38 r4:ed984818 r3:ed984818
[<c01bcd84>] (sysfs_create_dir_ns) from [<c0625578>] (kobject_add_internal+0xb4/0x2d0)
 r6:ed98481c r5:ef03fd00 r4:ed984818
[<c06254c4>] (kobject_add_internal) from [<c06258d0>] (kobject_add+0x50/0x98)
 r8:00000001 r7:c08f6f08 r6:c08f6f10 r5:00000000 r4:ed984818
[<c0625884>] (kobject_add) from [<c037b164>] (device_add+0xc8/0x538)
 r3:00000003 r2:00000000
 r6:ed984818 r5:00000000 r4:ed984810
[<c037b09c>] (device_add) from [<c037ff24>] (platform_device_add+0xb4/0x220)
 r10:ed197e60 r9:bf107748 r8:00000001 r7:ed984810 r6:ed984800 r5:00000000
 r4:ed197d80
[<c037fe70>] (platform_device_add) from [<c0380874>] (platform_device_register_full+0xe8/0x110)
 r8:00000001 r7:00000000 r6:c0921620 r5:ed984800 r4:ed197d80 r3:00000000
[<c038078c>] (platform_device_register_full) from [<bf10e0e4>] (etnaviv_init+0xa4/0xd0 [etnaviv])
 r5:00000000 r4:ef7b71ec
[<bf10e040>] (etnaviv_init [etnaviv]) from [<c000b478>] (do_one_initcall+0x90/0x294)
 r5:bf10e040 r4:bf107700
[<c000b3e8>] (do_one_initcall) from [<c00ac83c>] (do_init_module+0x68/0x1d4)
 r8:00000001 r7:bf107700 r6:eea50300 r5:c0921b48 r4:bf107700
[<c00ac7d4>] (do_init_module) from [<c00ab524>] (load_module+0x189c/0x2018)
 r7:bf107700 r6:eeb78400 r5:c0921b48 r4:ed197f38
[<c00a9c88>] (load_module) from [<c00abe78>] (sys_finit_module+0x94/0xa0)
 r10:00020000 r9:ed196000 r8:004d784c r7:00000003 r6:00000000 r5:00000000
 r4:7fffffff
[<c00abde4>] (sys_finit_module) from [<c0009000>] (ret_fast_syscall+0x0/0x54)
Exception stack(0xed197fa8 to 0xed197ff0)
7fa0:                   004eb178 00000000 00000003 004d784c 00000000 004eccc0
7fc0: 004eb178 00000000 57daf400 0000017b 00040000 00000000 004ebea0 00000000
7fe0: be84e1f8 be84e1e8 004cf4bb b6ef76b2
 r8:c0009228 r7:0000017b r6:57daf400 r5:00000000 r4:004eb178
kobject_add_internal failed for etnaviv with -EEXIST, don't try to register things with the same name in the same directory.

-- 
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