From 6ed8b7cfc04d11c54ed00c3893b4e5f9ab9bd36f Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Wed, 4 Sep 2024 21:17:27 -0700 Subject: [PATCH] Input: sun4i-ps2 - use guard notation when acquiring spinlock Using guard notation makes the code more compact and error handling more robust by ensuring that locks are released in all code paths when control leaves critical section. Link: https://lore.kernel.org/r/20240905041732.2034348-23-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov --- drivers/input/serio/sun4i-ps2.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/input/serio/sun4i-ps2.c b/drivers/input/serio/sun4i-ps2.c index 95cd8aaee65d..267214ca9b51 100644 --- a/drivers/input/serio/sun4i-ps2.c +++ b/drivers/input/serio/sun4i-ps2.c @@ -101,7 +101,7 @@ static irqreturn_t sun4i_ps2_interrupt(int irq, void *dev_id) unsigned int rxflags = 0; u32 rval; - spin_lock(&drvdata->lock); + guard(spinlock)(&drvdata->lock); /* Get the PS/2 interrupts and clear them */ intr_status = readl(drvdata->reg_base + PS2_REG_LSTS); @@ -134,8 +134,6 @@ static irqreturn_t sun4i_ps2_interrupt(int irq, void *dev_id) writel(intr_status, drvdata->reg_base + PS2_REG_LSTS); writel(fifo_status, drvdata->reg_base + PS2_REG_FSTS); - spin_unlock(&drvdata->lock); - return IRQ_HANDLED; } @@ -146,7 +144,6 @@ static int sun4i_ps2_open(struct serio *serio) u32 clk_scdf; u32 clk_pcdf; u32 rval; - unsigned long flags; /* Set line control and enable interrupt */ rval = PS2_LCTL_STOPERREN | PS2_LCTL_ACKERREN @@ -171,9 +168,8 @@ static int sun4i_ps2_open(struct serio *serio) rval = PS2_GCTL_RESET | PS2_GCTL_INTEN | PS2_GCTL_MASTER | PS2_GCTL_BUSEN; - spin_lock_irqsave(&drvdata->lock, flags); + guard(spinlock_irqsave)(&drvdata->lock); writel(rval, drvdata->reg_base + PS2_REG_GCTL); - spin_unlock_irqrestore(&drvdata->lock, flags); return 0; } -- 2.20.1