regmap: Report if we actually handled an interrupt in regmap-irq

While the IRQ core doesn't currently support shared threaded interrupts
that's no reason for drivers not to do their bit and report IRQ_NONE when
they don't get an interrupt. This allows the core spurious/wedget interrupt
detection support to do its thing.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index bd54f63..6b8a74c 100644 (file)
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -100,6 +100,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
        u8 *buf8 = data->status_reg_buf;
        u16 *buf16 = data->status_reg_buf;
        u32 *buf32 = data->status_reg_buf;
+       bool handled = false;
 
        ret = regmap_bulk_read(map, chip->status_base, data->status_reg_buf,
                               chip->num_regs);
@@ -146,10 +147,14 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
                if (data->status_buf[chip->irqs[i].reg_offset] &
                    chip->irqs[i].mask) {
                        handle_nested_irq(data->irq_base + i);
+                       handled = true;
                }
        }
 
-       return IRQ_HANDLED;
+       if (handled)
+               return IRQ_HANDLED;
+       else
+               return IRQ_NONE;
 }
 
 /**