From: Anastasia Belova <abelova@xxxxxxxxxxxxx>
[ 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@xxxxxxxxxxxxx>
Reviewed-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
Acked-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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);
--
2.35.1
