Re: [PATCH v7 5/5] clk: Implement clk_unregister()

From: Sylwester Nawrocki
Date: Thu Oct 31 2013 - 14:55:37 EST

On 31/10/13 19:32, Stephen Warren wrote:
> On 10/29/2013 01:51 PM, Sylwester Nawrocki wrote:
>> > clk_unregister() is currently not implemented and it is required when
>> > a clock provider module needs to be unloaded.
>> >
>> > Normally the clock supplier module is prevented to be unloaded by
>> > taking reference on the module in clk_get().
>> >
>> > For cases when the clock supplier module deinitializes despite the
>> > consumers of its clocks holding a reference on the module, e.g. when
>> > the driver is unbound through "unbind" sysfs attribute, there are
>> > empty clock ops added. These ops are assigned temporarily to struct
>> > clk and used until all consumers release the clock, to avoid invoking
>> > callbacks from the module which just got removed.
> This patch is now in Mike's clk-next and hence next-20131031, and causes
> both a WARN and an OOPS when booting the Tegra Dalmore board. (See log
> below)
> If I do the following to fix some other issues:
> 1) Apply:
> clk: fix boot panic with non-dev-associated clocks
> 2) Merge some Tegra-specific bug-fixes:
> Re: pull request for Tegra clock rework and Tegra124 clock support
> ... then revert this patch a336ed7 "clk: Implement clk_unregister()",
> everything works again.

Does it still crash when you apply this patch ?

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