clk: imx: gate2: Add locking in is_enabled op

Protect against enabling/disabling the gate while we're
checking if it is enabled.
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/clk/imx/clk-gate2.c

@@ -101,9 +101,17 @@ static int clk_gate2_reg_is_enabled(void __iomem *reg, u8 bit_idx,
 static int clk_gate2_is_enabled(struct clk_hw *hw)
 {
 	struct clk_gate2 *gate = to_clk_gate2(hw);
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(gate->lock, flags);
 
-	return clk_gate2_reg_is_enabled(gate->reg, gate->bit_idx,
+	ret = clk_gate2_reg_is_enabled(gate->reg, gate->bit_idx,
 					gate->cgr_val, gate->cgr_mask);
+
+	spin_unlock_irqrestore(gate->lock, flags);
+
+	return ret;
 }
 
 static void clk_gate2_disable_unused(struct clk_hw *hw)