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clk: Don't try to use a struct clk* after it could have been freed
As __clk_release could call kfree on clk and then we wouldn't have a safe way
of getting the module that owns the clock.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Fixes: fcb0ee6a3d
("clk: Implement clk_unregister")
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
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1 changed files with 4 additions and 1 deletions
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@ -2268,14 +2268,17 @@ int __clk_get(struct clk *clk)
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void __clk_put(struct clk *clk)
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{
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struct module *owner;
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if (!clk || WARN_ON_ONCE(IS_ERR(clk)))
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return;
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clk_prepare_lock();
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owner = clk->owner;
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kref_put(&clk->ref, __clk_release);
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clk_prepare_unlock();
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module_put(clk->owner);
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module_put(owner);
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}
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/*** clk rate change notifiers ***/
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