[PATCH] v2 pm: clk: fix a missing check of clk_prepare

[Aditya Pakki]

clk_prepare() could fail, so let's check its status, and if it fails,
issue an error message and change the clock_entry_status to
PCE_STATUS_ERROR

Signed-off-by: Aditya Pakki <pakki...@umn.edu>
---
 drivers/base/power/clock_ops.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index 5a42ae4078c2..732764becafe 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -65,10 +65,15 @@ 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);
-               ce->status = PCE_STATUS_ACQUIRED;
-               dev_dbg(dev, "Clock %pC con_id %s managed by runtime PM.\n",
-                       ce->clk, ce->con_id);
+               if (clk_prepare(ce->clk)) {
+                       ce->status = PCE_STATUS_ERROR;
+                       dev_err(dev, "clk_prepare failed\n");
+               } else {
+                       ce->status = PCE_STATUS_ACQUIRED;
+                       dev_dbg(dev,
+                               "Clock %pC con_id %s managed by runtime PM.\n",
+                               ce->clk, ce->con_id);
+               }
        }
 }
 
-- 
2.17.1