diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2014-06-20 01:34:42 +0400 |
|---|---|---|
| committer | Jason Cooper <jason@lakedaemon.net> | 2014-06-24 16:38:17 +0400 |
| commit | 25dc49e3321a3b3f17b3f78297432073bb14ec0b (patch) | |
| tree | ee75af1081476b887aea9d6f0d4e1924e5c44197 /drivers/irqchip/spear-shirq.c | |
| parent | 97dcc21bd3dc7f04a48ff37700ae838feb35fca4 (diff) | |
| download | linux-25dc49e3321a3b3f17b3f78297432073bb14ec0b.tar.xz | |
irqchip: spear_shirq: Simplify chained handler
I don't know if there are less efficient ways to code that. Get rid of
the loop mess and use efficient code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20140619212713.662897061@linutronix.de
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/irqchip/spear-shirq.c')
| -rw-r--r-- | drivers/irqchip/spear-shirq.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/irqchip/spear-shirq.c b/drivers/irqchip/spear-shirq.c index 2a33129c4f4b..8521a7295b02 100644 --- a/drivers/irqchip/spear-shirq.c +++ b/drivers/irqchip/spear-shirq.c @@ -224,23 +224,20 @@ static void shirq_handler(unsigned irq, struct irq_desc *desc) struct spear_shirq *shirq = irq_get_handler_data(irq); struct irq_data *idata = irq_desc_get_irq_data(desc); struct irq_chip *chip = irq_data_get_irq_chip(idata); - u32 i, j, val, mask; + u32 pend; chip->irq_ack(idata); - mask = shirq->mask; - while ((val = readl(shirq->base + shirq->regs.status_reg) & - mask)) { + pend = readl(shirq->base + shirq->regs.status_reg) & shirq->mask; + pend >>= shirq->offset; - val >>= shirq->offset; - for (i = 0, j = 1; i < shirq->nr_irqs; i++, j <<= 1) { + while (pend) { + int irq = __ffs(pend); - if (!(j & val)) - continue; - - generic_handle_irq(shirq->virq_base + i); - } + pend &= ~(0x1 << irq); + generic_handle_irq(shirq->virq_base + irq); } + chip->irq_unmask(idata); } |