linux-kernel - Re: [PATCH] input: twl4030-vibra: Fix ERROR: Bad of_node

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Date:	Thu, 6 Aug 2015 13:34:01 +0300
From:	Tomi Valkeinen <tomi.valkeinen@...com>
To:	"Dr. H. Nikolaus Schaller" <hns@...delico.com>
CC:	Belisko Marek <marek.belisko@...il.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robherring2@...il.com>,
	"Sarha, Jyri" <jsarha@...com>
Subject: Re: [PATCH] input: twl4030-vibra: Fix ERROR: Bad of_node_put() warning



On 29/07/15 12:44, Dr. H. Nikolaus Schaller wrote:

>> We have a similar error on OMAP5 here:
>>
>> [   11.027144] CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.2.0-rc4-letux+ #1187
>> [   11.034790] Hardware name: Generic OMAP5 (Flattened Device Tree)
>> [   11.041077] Workqueue: deferwq deferred_probe_work_func
>> [   11.046557] [<c0015a00>] (unwind_backtrace) from [<c00124a0>] (show_stack+0x10/0x14)
>> [   11.054663] [<c00124a0>] (show_stack) from [<c05cb694>] (dump_stack+0x78/0x94)
>> [   11.062224] [<c05cb694>] (dump_stack) from [<c02cfd5c>] (kobject_release+0x68/0x7c)
>> [   11.070234] [<c02cfd5c>] (kobject_release) from [<c03291d8>] (omapdss_of_find_source_for_first_ep+0x58/0x74)
>> [   11.080510] [<c03291d8>] (omapdss_of_find_source_for_first_ep) from [<bf089290>] (hdmic_probe+0xb4/0x22c [connector_hdmi])
>> [   11.092080] [<bf089290>] (hdmic_probe [connector_hdmi]) from [<c0381490>] (platform_drv_probe+0x48/0x90)
>> [   11.101997] [<c0381490>] (platform_drv_probe) from [<c037fc98>] (really_probe+0xd4/0x238)
>> [   11.110556] [<c037fc98>] (really_probe) from [<c037ff44>] (driver_probe_device+0x30/0x48)
>> [   11.119108] [<c037ff44>] (driver_probe_device) from [<c037e7bc>] (bus_for_each_drv+0x4c/0x84)
>> [   11.128023] [<c037e7bc>] (bus_for_each_drv) from [<c037fe90>] (__device_attach+0x70/0xd0)
>> [   11.136579] [<c037fe90>] (__device_attach) from [<c037f3f8>] (bus_probe_device+0x28/0x84)
>> [   11.145135] [<c037f3f8>] (bus_probe_device) from [<c037f808>] (deferred_probe_work_func+0x58/0x88)
>> [   11.154518] [<c037f808>] (deferred_probe_work_func) from [<c0054ff0>] (process_one_work+0x294/0x4a0)
>> [   11.164083] [<c0054ff0>] (process_one_work) from [<c0055414>] (worker_thread+0x1ec/0x2fc)
>> [   11.172641] [<c0055414>] (worker_thread) from [<c005a3b4>] (kthread+0xd4/0xe8)
>> [   11.180200] [<c005a3b4>] (kthread) from [<c000edf8>] (ret_from_fork+0x14/0x3c)
>>
>> So it looks as if there are more get/put mismatches in the drivers which are usually not visible.

Yep, we'll have a look at that.

 Tomi


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