[PATCH v2 5/5] clk: imx: gate2: Add locking in is_enabled op
From: Abel Vesa <hidden>
Date: 2020-10-28 22:26:05
Also in:
linux-clk, linux-devicetree, lkml
Subsystem:
common clk framework, nxp i.mx clock drivers, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Abel Vesa, Linus Torvalds
Protect against enabling/disabling the gate while we're checking if it is enabled. Signed-off-by: Abel Vesa <redacted> --- drivers/clk/imx/clk-gate2.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/imx/clk-gate2.c b/drivers/clk/imx/clk-gate2.c
index 7e4b5e8..480a184 100644
--- a/drivers/clk/imx/clk-gate2.c
+++ b/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; - return clk_gate2_reg_is_enabled(gate->reg, gate->bit_idx, + spin_lock_irqsave(gate->lock, flags); + + 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)
--
2.7.4
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