Comment 3 for bug 1561449

[ 4.588798] WARNING: CPU: 3 PID: 272 at /build/linux-_Kv5oI/linux-4.2.0/drivers/i2c/busses/i2c-designware-baytrail.c:112 baytrail_i2c_acquire+0x139/0x1e0 [i2c_designware_platform]()
[ 4.588801] Modules linked in: v4l2_common(+) videodev btusb btrtl snd_pcm media btbcm btintel bluetooth snd_seq_midi snd_seq_midi_event snd_rawmidi lpc_ich(+) shpchp(+) mei_txe(+) mei processor_thermal_device(+) intel_soc_dts_iosf snd_seq snd_seq_device snd_timer 8250_fintek snd dw_dmac dw_dmac_core pwm_lpss_platform soundcore i2c_designware_platform(+) i2c_designware_core pwm_lpss spi_pxa2xx_platform 8250_dw tpm_crb soc_button_array mac_hid int3400_thermal int3403_thermal acpi_pad acpi_thermal_rel int340x_thermal_zone parport_pc ppdev lp parport autofs4 hid_generic usbhid mmc_block i915 i2c_algo_bit drm_kms_helper drm wmi video i2c_hid hid sdhci_acpi sdhci pinctrl_cherryview
[ 4.588887] CPU: 3 PID: 272 Comm: systemd-udevd Not tainted 4.2.0-34-generic #39-Ubuntu
[ 4.588890] Hardware name: ASUSTeK COMPUTER INC. E200HA/E200HA, BIOS E200HA.207 02/01/2016
[ 4.588894] 0000000000000000 00000000ad7a884f ffff8800717879d8 ffffffff817ebed3
[ 4.588901] 0000000000000000 0000000000000000 ffff880071787a18 ffffffff8107b986
[ 4.588910] ffff8800717879f8 ffff880078703818 00000000ffffff92 00000000fffedf68
[ 4.588916] Call Trace:
[ 4.588929] [<ffffffff817ebed3>] dump_stack+0x45/0x57
[ 4.588938] [<ffffffff8107b986>] warn_slowpath_common+0x86/0xc0
[ 4.588943] [<ffffffff8107baba>] warn_slowpath_null+0x1a/0x20
 [ 4.588950] [<ffffffffc02c18a9>] baytrail_i2c_acquire+0x139/0x1e0 [i2c_designware_platform]
[ 4.588958] [<ffffffff816b10a4>] ? clk_get_sys+0x104/0x140
[ 4.588965] [<ffffffffc02a72b7>] i2c_dw_init+0x27/0x320 [i2c_designware_core]
[ 4.588969] [<ffffffff816b2524>] ? clk_enable_unlock+0x54/0xc0
[ 4.588975] [<ffffffffc02c1368>] dw_i2c_probe+0x148/0x3e0 [i2c_designware_platform]
 [ 4.588983] [<ffffffff815240a4>] platform_drv_probe+0x34/0x90
 [ 4.588988] [<ffffffff81521eea>] driver_probe_device+0x21a/0x490
 [ 4.588993] [<ffffffff815221f0>] __driver_attach+0x90/0xa0 [ 4.588998] [<ffffffff81522160>] ? driver_probe_device+0x490/0x490
 [ 4.589003] [<ffffffff8151fa8c>] bus_for_each_dev+0x6c/0xc0
[ 4.589008] [<ffffffff8152168e>] driver_attach+0x1e/0x20
 [ 4.589013] [<ffffffff815211bb>] bus_add_driver+0x1eb/0x280
[ 4.589017] [<ffffffffc02c6000>] ? 0xffffffffc02c6000
 [ 4.589021] [<ffffffff81522a90>] driver_register+0x60/0xe0
 [ 4.589026] [<ffffffff81523fea>] __platform_driver_register+0x4a/0x50
 [ 4.589032] [<ffffffffc02c6017>] dw_i2c_init_driver+0x17/0x1000 [i2c_designware_platform]
[ 4.589038] [<ffffffff81002123>] do_one_initcall+0xb3/0x200
[ 4.589045] [<ffffffff811dea27>] ? kmem_cache_alloc_trace+0x187/0x1f0
[ 4.589050] [<ffffffff817e9992>] ? do_init_module+0x28/0x1e7
 [ 4.589055] [<ffffffff817e99ca>] do_init_module+0x60/0x1e7
 [ 4.589061] [<ffffffff8110308e>] load_module+0x167e/0x1c10
 [ 4.589066] [<ffffffff810ff1d0>] ? __symbol_put+0x60/0x60
[ 4.589074] [<ffffffff81203a30>] ? kernel_read+0x50/0x80
 [ 4.589080] [<ffffffff81103879>] SyS_finit_module+0xb9/0xf0
[ 4.589086] [<ffffffff817f2cf2>] entry_SYSCALL_64_fastpath+0x16/0x75