[PATCH 22/22] Input: sparcspkr - use guard notation when acquiring spinlock

[Dmitry Torokhov]

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.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
 drivers/input/misc/sparcspkr.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/input/misc/sparcspkr.c b/drivers/input/misc/sparcspkr.c
index 20020cbc0752..5de59ae90c67 100644
--- a/drivers/input/misc/sparcspkr.c
+++ b/drivers/input/misc/sparcspkr.c
@@ -69,7 +69,6 @@ static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int
 	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
 	struct bbc_beep_info *info = &state->u.bbc;
 	unsigned int count = 0;
-	unsigned long flags;
 
 	if (type != EV_SND)
 		return -1;
@@ -85,7 +84,7 @@ static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int
 
 	count = bbc_count_to_reg(info, count);
 
-	spin_lock_irqsave(&state->lock, flags);
+	guard(spinlock_irqsave)(&state->lock);
 
 	if (count) {
 		sbus_writeb(0x01,                 info->regs + 0);
@@ -97,8 +96,6 @@ static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int
 		sbus_writeb(0x00,                 info->regs + 0);
 	}
 
-	spin_unlock_irqrestore(&state->lock, flags);
-
 	return 0;
 }
 
@@ -107,7 +104,6 @@ static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned
 	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
 	struct grover_beep_info *info = &state->u.grover;
 	unsigned int count = 0;
-	unsigned long flags;
 
 	if (type != EV_SND)
 		return -1;
@@ -121,7 +117,7 @@ static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned
 	if (value > 20 && value < 32767)
 		count = 1193182 / value;
 
-	spin_lock_irqsave(&state->lock, flags);
+	guard(spinlock_irqsave)(&state->lock);
 
 	if (count) {
 		/* enable counter 2 */
@@ -136,8 +132,6 @@ static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned
 		sbus_writeb(sbus_readb(info->enable_reg) & 0xFC, info->enable_reg);
 	}
 
-	spin_unlock_irqrestore(&state->lock, flags);
-
 	return 0;
 }
 
-- 
2.46.0.469.g59c65b2a67-goog