[PATCH] clk: Fix return value of of_clk_get_by_name()

[Alexander Shiyan <eagle.alexander923@gmail.com>]

of_clk_get_by_name() is used by clk_bulk_get_optional() => clk_get() function,
so in case some clocks are missing we should return -ENOENT error code,
as this is normal for optional clocks.
The current implementation of of_clk_get_by_name() returns the -EINVAL error
that comes from of_clk_get() with index <0 if the clock is not described
in the device tree.

Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
---
 drivers/clk/clkdev.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index dbe998b6af..f6c2fcdf10 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -52,10 +52,9 @@ EXPORT_SYMBOL(of_clk_get);
  */
 struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
 {
-	struct clk *clk = ERR_PTR(-ENOENT);
-
 	/* Walk up the tree of devices looking for a clock that matches */
 	while (np) {
+		struct clk *clk;
 		int index = 0;
 
 		/*
@@ -68,11 +67,12 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
 							 name);
 		clk = of_clk_get(np, index);
 		if (!IS_ERR(clk))
-			break;
-		else if (name && index >= 0) {
+			return clk;
+
+		if (name && index >= 0) {
 			pr_err("ERROR: could not get clock %pOF:%s(%i)\n",
 				np, name ? name : "", index);
-			return clk;
+			return ERR_PTR(-ENOENT);
 		}
 
 		/*
@@ -85,7 +85,7 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
 			break;
 	}
 
-	return clk;
+	return ERR_PTR(-ENOENT);
 }
 EXPORT_SYMBOL(of_clk_get_by_name);
 #endif
-- 
2.39.1