Hi all!

any idea how to fix this error?

Code:
WARNING: at fs/sysfs/dir.c:491 sysfs_add_one+0x68/0x84()
<4>[    5.919019] sysfs: cannot create duplicate filename '/devices/virtual/switch/h2w'
<4>[    5.919248] Modules linked in:
<4>[    5.919420] [<c003215c>] (unwind_backtrace+0x0/0xd8) from [<c006c1e4>] (warn_slowpath_common+0x48/0x60)
<4>[    5.919730] [<c006c1e4>] (warn_slowpath_common+0x48/0x60) from [<c006c234>] (warn_slowpath_fmt+0x24/0x30)
<4>[    5.920044] [<c006c234>] (warn_slowpath_fmt+0x24/0x30) from [<c0110868>] (sysfs_add_one+0x68/0x84)
<4>[    5.923452] [<c0110868>] (sysfs_add_one+0x68/0x84) from [<c0110f08>] (create_dir+0x4c/0x94)
<4>[    5.931877] [<c0110f08>] (create_dir+0x4c/0x94) from [<c0110f88>] (sysfs_create_dir+0x38/0x50)
<4>[    5.940416] [<c0110f88>] (sysfs_create_dir+0x38/0x50) from [<c01aea14>] (kobject_add_internal+0xec/0x1c8)
<4>[    5.949946] [<c01aea14>] (kobject_add_internal+0xec/0x1c8) from [<c01aec6c>] (kobject_add+0x4c/0x5c)
<4>[    5.959083] [<c01aec6c>] (kobject_add+0x4c/0x5c) from [<c021b6a0>] (device_add+0x94/0x49c)
<4>[    5.967311] [<c021b6a0>] (device_add+0x94/0x49c) from [<c021bb38>] (device_create_vargs+0x78/0xa4)
<4>[    5.976227] [<c021bb38>] (device_create_vargs+0x78/0xa4) from [<c021bb80>] (device_create+0x1c/0x24)
<4>[    5.985383] [<c021bb80>] (device_create+0x1c/0x24) from [<c02db604>] (switch_dev_register+0x5c/0xe8)
<4>[    5.994487] [<c02db604>] (switch_dev_register+0x5c/0xe8) from [<c041560c>] (hs_probe+0x4c/0x344)
<4>[    6.003251] [<c041560c>] (hs_probe+0x4c/0x344) from [<c021e6d8>] (platform_drv_probe+0x18/0x1c)
<4>[    6.011920] [<c021e6d8>] (platform_drv_probe+0x18/0x1c) from [<c021d8a8>] (driver_probe_device+0xa0/0x14c)
<4>[    6.021553] [<c021d8a8>] (driver_probe_device+0xa0/0x14c) from [<c021d9b4>] (__driver_attach+0x60/0x84)
<4>[    6.030928] [<c021d9b4>] (__driver_attach+0x60/0x84) from [<c021d118>] (bus_for_each_dev+0x48/0x84)
<4>[    6.039955] [<c021d118>] (bus_for_each_dev+0x48/0x84) from [<c021ca70>] (bus_add_driver+0x9c/0x214)
<4>[    6.048983] [<c021ca70>] (bus_add_driver+0x9c/0x214) from [<c021dc80>] (driver_register+0xa8/0x138)
<4>[    6.058028] [<c021dc80>] (driver_register+0xa8/0x138) from [<c002b3cc>] (do_one_initcall+0x5c/0x1b8)
<4>[    6.067113] [<c002b3cc>] (do_one_initcall+0x5c/0x1b8) from [<c00083f8>] (kernel_init+0x98/0x110)
<4>[    6.075903] [<c00083f8>] (kernel_init+0x98/0x110) from [<c002d000>] (kernel_thread_exit+0x0/0x8)