From aaa29bb01cc4bf5a87dbdb219efba3b09f259d8e Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Thu, 21 Mar 2019 11:00:21 -0700 Subject: [PATCH] bus: ti-sysc: Fix sysc_unprepare() when no clocks have been allocated If we return early before ddata->clocks have been allocated we will get a NULL pointer dereference in sysc_unprepare(). Let's fix this by returning early when no clocks are allocated. Fixes: 0eecc636e5a2 ("bus: ti-sysc: Add minimal TI sysc interconnect target driver") Signed-off-by: Tony Lindgren --- drivers/bus/ti-sysc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index d299ec79e4c3..647caccacee6 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -1331,6 +1331,9 @@ static void sysc_unprepare(struct sysc *ddata) { int i; + if (!ddata->clocks) + return; + for (i = 0; i < SYSC_MAX_CLOCKS; i++) { if (!IS_ERR_OR_NULL(ddata->clocks[i])) clk_unprepare(ddata->clocks[i]); -- 2.30.2