From: Anastasia Belova abelova@astralinux.ru
[ Upstream commit ee9ef11bd2a59c2fefaa0959e5efcdf040d7c654 ]
Check clk for NULL before calling clk_enable_unlocked where clk is dereferenced. There is such check in other implementations of clk_enable.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: e7300d04bd08 ("MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.") Signed-off-by: Anastasia Belova abelova@astralinux.ru Reviewed-by: Philippe Mathieu-Daudé philmd@linaro.org Acked-by: Florian Fainelli f.fainelli@gmail.com Signed-off-by: Thomas Bogendoerfer tsbogend@alpha.franken.de Signed-off-by: Sasha Levin sashal@kernel.org --- arch/mips/bcm63xx/clk.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/mips/bcm63xx/clk.c b/arch/mips/bcm63xx/clk.c index 3be875a45c83..0b718a94656a 100644 --- a/arch/mips/bcm63xx/clk.c +++ b/arch/mips/bcm63xx/clk.c @@ -316,6 +316,8 @@ static struct clk clk_periph = { */ int clk_enable(struct clk *clk) { + if (!clk) + return 0; mutex_lock(&clocks_mutex); clk_enable_unlocked(clk); mutex_unlock(&clocks_mutex);