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 <tony@atomide.com>

1 files changed, 3 insertions, 0 deletions

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]);