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gpio: pch: Refactor pch_irq_type() to avoid unnecessary locking 

When type is not supported there is no need to lock and check.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Andy Shevchenko 2020-04-14 20:48:59 +03:00
parent 5a4245de48
commit 368b843601
1 changed files with 5 additions and 6 deletions
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11
drivers/gpio/gpio-pch.c
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@ -229,17 +229,15 @@ static int pch_irq_type(struct irq_data *d, unsigned int type)
int ch, irq = d->irq;
ch = irq - chip->irq_base;
if (irq <= chip->irq_base + 7) {
if (irq < chip->irq_base + 8) {
im_reg = &chip->reg->im0;
im_pos = ch;
im_pos = ch - 0;
} else {
im_reg = &chip->reg->im1;
im_pos = ch - 8;
}
dev_dbg(chip->dev, "irq=%d type=%d ch=%d pos=%d\n", irq, type, ch, im_pos);
spin_lock_irqsave(&chip->spinlock, flags);
switch (type) {
case IRQ_TYPE_EDGE_RISING:
val = PCH_EDGE_RISING;
@ -257,9 +255,11 @@ static int pch_irq_type(struct irq_data *d, unsigned int type)
val = PCH_LEVEL_L;
break;
default:
goto unlock;
return 0;
}
spin_lock_irqsave(&chip->spinlock, flags);
/* Set interrupt mode */
im = ioread32(im_reg) & ~(PCH_IM_MASK << (im_pos * 4));
iowrite32(im | (val << (im_pos * 4)), im_reg);
@ -270,7 +270,6 @@ static int pch_irq_type(struct irq_data *d, unsigned int type)
else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
irq_set_handler_locked(d, handle_edge_irq);
unlock:
spin_unlock_irqrestore(&chip->spinlock, flags);
return 0;
}