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clk: gpio: handle error codes for of_clk_get_parent_count()

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We might make bad memory allocations if we get (e.g.) -ENOSYS from
of_clk_get_parent_count().

Noticed by Coverity.

Fixes: f66541ba02 ("clk: gpio: Get parent clk names in of_gpio_clk_setup()")
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Jyri Sarha <jsarha@ti.com>
Cc: Sergej Sawazki <ce3a@gmx.de>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
This commit is contained in:
Brian Norris 2015-12-16 10:35:03 -08:00 committed by Michael Turquette
parent c76eb11c8f
commit 0b2e78865d
1 changed files with 4 additions and 2 deletions
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6
drivers/clk/clk-gpio.c
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@ -287,12 +287,14 @@ static void __init of_gpio_clk_setup(struct device_node *node,
const char **parent_names;
int i, num_parents;
num_parents = of_clk_get_parent_count(node);
if (num_parents < 0)
return;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return;
num_parents = of_clk_get_parent_count(node);
parent_names = kcalloc(num_parents, sizeof(char *), GFP_KERNEL);
if (!parent_names) {
kfree(data);