[PATCH] clk: mux: Return a sane value on error

[Russ Dill <Russ.Dill@ti.com>]

The get_parent op is defined as returning u8, but clk-mux is
returning negative values on error.  Code within drivers/clk/clk.c
uses this return value as an index into an array which could
cause an oops.

Signed-off-by: Russ Dill <Russ.Dill@ti.com>
---
 drivers/clk/clk-mux.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c
index 4f96ff3..cc06015 100644
--- a/drivers/clk/clk-mux.c
+++ b/drivers/clk/clk-mux.c
@@ -51,7 +51,7 @@ static u8 clk_mux_get_parent(struct clk_hw *hw)
 		for (i = 0; i < num_parents; i++)
 			if (mux->table[i] == val)
 				return i;
-		return -EINVAL;
+		return 0;
 	}
 
 	if (val && (mux->flags & CLK_MUX_INDEX_BIT))
@@ -61,7 +61,7 @@ static u8 clk_mux_get_parent(struct clk_hw *hw)
 		val--;
 
 	if (val >= num_parents)
-		return -EINVAL;
+		return 0;
 
 	return val;
 }
-- 
1.8.3.2