diff options
| author | Nishanth Menon <nm@ti.com> | 2014-06-26 11:10:32 +0400 |
|---|---|---|
| committer | Jason Cooper <jason@lakedaemon.net> | 2014-06-30 23:21:01 +0400 |
| commit | 29918b6790d92456cab87ff41a01224e0882d04a (patch) | |
| tree | a710a197bb20c387752389dd336e3f4908212003 /drivers/irqchip/irq-crossbar.c | |
| parent | 2f7d2fb71dd0c14f9c0fe66f2ed7b4685fa745e2 (diff) | |
| download | linux-29918b6790d92456cab87ff41a01224e0882d04a.tar.xz | |
irqchip: crossbar: Introduce centralized check for crossbar write
This is a basic check to ensure that crossbar register needs to be
written. This ensures that we have a common check which is used in
both map and unmap logic.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Sricharan R <r.sricharan@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Link: https://lkml.kernel.org/r/1403766634-18543-15-git-send-email-r.sricharan@ti.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/irqchip/irq-crossbar.c')
| -rw-r--r-- | drivers/irqchip/irq-crossbar.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c index c9f068ca7bc9..83f803bfab76 100644 --- a/drivers/irqchip/irq-crossbar.c +++ b/drivers/irqchip/irq-crossbar.c @@ -84,10 +84,20 @@ static inline int allocate_free_irq(int cb_no) return -ENODEV; } +static inline bool needs_crossbar_write(irq_hw_number_t hw) +{ + if (hw > GIC_IRQ_START) + return true; + + return false; +} + static int crossbar_domain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { - cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]); + if (needs_crossbar_write(hw)) + cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]); + return 0; } @@ -106,7 +116,7 @@ static void crossbar_domain_unmap(struct irq_domain *d, unsigned int irq) { irq_hw_number_t hw = irq_get_irq_data(irq)->hwirq; - if (hw > GIC_IRQ_START) { + if (needs_crossbar_write(hw)) { cb->irq_map[hw - GIC_IRQ_START] = IRQ_FREE; cb->write(hw - GIC_IRQ_START, cb->safe_map); } |