mfd: twl6040: Check clk_prepare_enable() return value in twl6040_power()

The clk_prepare_enable() function can fail so check the return
value and propagate the error in case of a failure.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
index 08a693cd38cc..85cc32a2e0e0 100644
--- a/drivers/mfd/twl6040.c
+++ b/drivers/mfd/twl6040.c
@@ -291,7 +291,11 @@ int twl6040_power(struct twl6040 *twl6040, int on)
                 if (twl6040->power_count++)
                         goto out;
 
-                clk_prepare_enable(twl6040->clk32k);
+                ret = clk_prepare_enable(twl6040->clk32k);
+                if (ret) {
+                        twl6040->power_count = 0;
+                        goto out;
+                }
 
                 /* Allow writes to the chip */
                 regcache_cache_only(twl6040->regmap, false);