ARM: riscpc: convert ecard to use irq_alloc_descs()

Use irq_alloc_descs() to allocate IRQs for expansion cards.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 13 insertions, 9 deletions

diff --git a/arch/arm/mach-rpc/ecard.c b/arch/arm/mach-rpc/ecard.c
index ec84cfde4ad7..1a6cfc8ca277 100644
--- a/arch/arm/mach-rpc/ecard.c
+++ b/arch/arm/mach-rpc/ecard.c
@@ -42,6 +42,7 @@
 #include <linux/init.h>
 #include <linux/mutex.h>
 #include <linux/kthread.h>
+#include <linux/irq.h>
 #include <linux/io.h>
 
 #include <asm/dma.h>
@@ -977,8 +978,7 @@ EXPORT_SYMBOL(ecardm_iomap);
  * If bit 1 of the first byte of the card is set, then the
  * card does not exist.
  */
-static int __init
-ecard_probe(int slot, card_type_t type)
+static int __init ecard_probe(int slot, unsigned irq, card_type_t type)
 {
         ecard_t **ecp;
         ecard_t *ec;
@@ -1032,19 +1032,18 @@ ecard_probe(int slot, card_type_t type)
                         break;
                 }
 
+        ec->irq = irq;
+
         /*
          * hook the interrupt handlers
          */
         if (slot < 8) {
-                ec->irq = 32 + slot;
                 irq_set_chip_and_handler(ec->irq, &ecard_chip,
                                          handle_level_irq);
                 irq_set_chip_data(ec->irq, ec);
                 set_irq_flags(ec->irq, IRQF_VALID);
         }
 
-        if (slot == 8)
-                ec->irq = 11;
 #ifdef CONFIG_ARCH_RPC
         /* On RiscPC, only first two slots have DMA capability */
         if (slot < 2)
@@ -1074,23 +1073,28 @@ ecard_probe(int slot, card_type_t type)
 static int __init ecard_init(void)
 {
         struct task_struct *task;
-        int slot, irqhw;
+        int slot, irqhw, irqbase;
+
+        irqbase = irq_alloc_descs(-1, 0, 8, -1);
+        if (irqbase < 0)
+                return irqbase;
 
         task = kthread_run(ecard_task, NULL, "kecardd");
         if (IS_ERR(task)) {
                 printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n",
                        PTR_ERR(task));
+                irq_free_descs(irqbase, 8);
                 return PTR_ERR(task);
         }
 
         printk("Probing expansion cards\n");
 
         for (slot = 0; slot < 8; slot ++) {
-                if (ecard_probe(slot, ECARD_EASI) == -ENODEV)
-                        ecard_probe(slot, ECARD_IOC);
+                if (ecard_probe(slot, irqbase + slot, ECARD_EASI) == -ENODEV)
+                        ecard_probe(slot, irqbase + slot, ECARD_IOC);
         }
 
-        ecard_probe(8, ECARD_IOC);
+        ecard_probe(8, 11, ECARD_IOC);
 
         irqhw = ecard_probeirqhw();