[PATCH] base: fix a missing check of clk_prepare

[Kangjie Lu]

clk_prepare() could fail, so let's check its status, and if it fails,
issue an error message.

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 drivers/base/power/clock_ops.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index 5a42ae4078c2..cb6144fb24e2 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -65,7 +65,9 @@ static void pm_clk_acquire(struct device *dev, struct 
pm_clock_entry *ce)
        if (IS_ERR(ce->clk)) {
                ce->status = PCE_STATUS_ERROR;
        } else {
-               clk_prepare(ce->clk);
+               if (clk_prepare(ce->clk))
+                       dev_err(dev, "clk_prepare failed.\n");
+
                ce->status = PCE_STATUS_ACQUIRED;
                dev_dbg(dev, "Clock %pC con_id %s managed by runtime PM.\n",
                        ce->clk, ce->con_id);
-- 
2.17.2 (Apple Git-113)