[PATCH 3.19.y-ckt 040/160] irqchip/versatile-fpga: Fix PCI IRQ mapping on Versatile PB

From: Kamal Mostafa
Date: Tue Jan 19 2016 - 20:14:18 EST

3.19.8-ckt13 -stable review patch. If anyone has any objections, please let me know.


From: Guillaume Delbergue <guillaume.delbergue@xxxxxxxxxxxxx>

commit d5d4fdd86f5759924fe54efa793e22eccf508db6 upstream.

This patch is specifically for PCI support on the Versatile PB board using
a DT. Currently, the dynamic IRQ mapping is broken when using DTs. For
example, on QEMU, the SCSI driver is unable to request the IRQ. To fix
this issue, this patch replaces the current dynamic mechanism with a
static value as is done in the non-DT case.

Signed-off-by: Guillaume Delbergue <guillaume.delbergue@xxxxxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
drivers/irqchip/irq-versatile-fpga.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/irqchip/irq-versatile-fpga.c b/drivers/irqchip/irq-versatile-fpga.c
index 1ab4517..56ebeba 100644
--- a/drivers/irqchip/irq-versatile-fpga.c
+++ b/drivers/irqchip/irq-versatile-fpga.c
@@ -210,7 +210,12 @@ int __init fpga_irq_of_init(struct device_node *node,
parent_irq = -1;

+ fpga_irq_init(base, node->name, IRQ_SIC_START, parent_irq, valid_mask,
+ node);
fpga_irq_init(base, node->name, 0, parent_irq, valid_mask, node);

writel(clear_mask, base + IRQ_ENABLE_CLEAR);
writel(clear_mask, base + FIQ_ENABLE_CLEAR);