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PM / clk: Fix clock error check in __pm_clk_add() 

In the final iteration of commit 245bd6f6af ("PM / clock_ops: Add
pm_clk_add_clk()"), a refcount increment was added by Grygorii Strashko.
However, the accompanying IS_ERR() check operates on the wrong clock
pointer, which is always zero at this point, i.e. not an error.
This may lead to a NULL pointer dereference later, when __clk_get()
tries to dereference an error pointer.

Check the passed clock pointer instead to fix this.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Fixes: 245bd6f6af ("PM / clock_ops: Add pm_clk_add_clk()")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Geert Uytterhoeven 2015-05-08 10:47:43 +02:00 committed by Rafael J. Wysocki
parent d2c4b43d88
commit 3fc3a0be0d
1 changed files with 1 additions and 1 deletions
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2
drivers/base/power/clock_ops.c
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@ -94,7 +94,7 @@ static int __pm_clk_add(struct device *dev, const char *con_id,
return -ENOMEM;
}
} else {
if (IS_ERR(ce->clk) || !__clk_get(clk)) {
if (IS_ERR(clk) || !__clk_get(clk)) {
kfree(ce);
return -ENOENT;
}