clk: do not attempt to fetch clock pointer with null device

Bail out early if device returned for the parent clock is null.
This avoids warning prints like this when doing clk dump:

  dev_get_uclass_priv: null device

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tero Kristo <kristo@kernel.org>

diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index 53e7be764d3653798dd2d66b566cc759efdc94d9..451d7da001ad7f8ff7352b88bc3038a8ded01ad4 100644 (file)
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -502,6 +502,8 @@ struct clk *clk_get_parent(struct clk *clk)
                return NULL;
 
        pdev = dev_get_parent(clk->dev);
+       if (!pdev)
+               return ERR_PTR(-ENODEV);
        pclk = dev_get_clk_ptr(pdev);
        if (!pclk)
                return ERR_PTR(-ENODEV);