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bus: ti-sysc: Fix sysc_unprepare() when no clocks have been allocated

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[ Upstream commit aaa29bb01c ]

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: 0eecc636e5 ("bus: ti-sysc: Add minimal TI sysc interconnect target driver")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tony Lindgren
2019-03-21 11:00:21 -07:00
committed by Greg Kroah-Hartman
parent 0d244fd367
commit 2fe6d9c113
1 changed files with 3 additions and 0 deletions
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3
drivers/bus/ti-sysc.c
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@@ -1400,6 +1400,9 @@ 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]);