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>

diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
index 08a693cd38cc4e2b17a7538be0e55ed743b6c002..85cc32a2e0e052984e0eeb7c59fca558f3d91e0e 100644 (file)
--- 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);