MIPS: ralink: allow NULL clock for clk_get_rate

Make the behaviour of clk_get_rate consistent with common clk's clk_get_rate by accepting NULL clocks as parameter. Some device drivers rely on this, and will cause an OOPS otherwise. Fixes: 3f0a06b ("MIPS: ralink: adds clkdev code") Reported-by: Mathias Kresin <[email protected]> Signed-off-by: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/16778/ Signed-off-by: Ralf Baechle <[email protected]>
fracktal · Sep 6, 2017 · a18097b · a18097b
1 parent 386787b
commit a18097b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/arch/mips/ralink/clk.c b/arch/mips/ralink/clk.c
@@ -53,6 +53,9 @@ EXPORT_SYMBOL_GPL(clk_disable);
 
 unsigned long clk_get_rate(struct clk *clk)
 {
+	if (!clk)
+		return 0;
+
 	return clk->rate;
 }
 EXPORT_SYMBOL_GPL(clk_get_rate);