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clk: gpio: handle error codes for of_clk_get_parent_count()

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commit 0b2e78865d92e2d70542cb1d4d7af1d4ea0a286d upstream.

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

Noticed by Coverity.

Fixes: f66541ba02d5 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Brian Norris 2015-12-16 10:35:03 -08:00 committed by Greg Kroah-Hartman
parent 7d674b2652
commit 2e75386d09
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)
return;