When we're running our hardirq handler, there's
not need to disable IRQs with spin_lock_irqsave()
because IRQs are already disabled. It also makes
no difference if we save or not IRQ flags.
Switch over to simple spin_lock/spin_unlock and
drop the "flags" variable.
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/tty/serial/omap-serial.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index b79c4fa..a79658d 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -350,11 +350,10 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id)
struct tty_struct *tty = up->port.state->port.tty;
unsigned int iir, lsr;
unsigned int type;
- unsigned long flags;
irqreturn_t ret = IRQ_HANDLED;
int max_count = 256;
- spin_lock_irqsave(&up->port.lock, flags);
+ spin_lock(&up->port.lock);
pm_runtime_get_sync(up->dev);
do {
@@ -394,7 +393,7 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id)
}
} while (!(iir & UART_IIR_NO_INT) && max_count--);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ spin_unlock(&up->port.lock);
tty_flip_buffer_push(tty);
--
1.7.12.rc3
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