isdn/sc: irq handler clean

* pass card number to irq handler

* use card number in irq handler to avoid looping through each adapter

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

2 files changed, 4 insertions, 16 deletions

diff --git a/drivers/isdn/sc/init.c b/drivers/isdn/sc/init.c
index d09c854cfac7..dd0acd06750b 100644
--- a/drivers/isdn/sc/init.c
+++ b/drivers/isdn/sc/init.c
@@ -334,7 +334,8 @@ static int __init sc_init(void)
                  */
                 sc_adapter[cinst]->interrupt = irq[b];
                 if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
-                                IRQF_DISABLED, interface->id, NULL))
+                                IRQF_DISABLED, interface->id,
+                                (void *)(unsigned long) cinst))
                 {
                         kfree(sc_adapter[cinst]->channel);
                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
diff --git a/drivers/isdn/sc/interrupt.c b/drivers/isdn/sc/interrupt.c
index bef7963cdd02..485be8b1e1b3 100644
--- a/drivers/isdn/sc/interrupt.c
+++ b/drivers/isdn/sc/interrupt.c
@@ -21,28 +21,15 @@
 #include "card.h"
 #include <linux/interrupt.h>
 
-static int get_card_from_irq(int irq)
-{
-        int i;
-
-        for(i = 0 ; i < cinst ; i++) {
-                if(sc_adapter[i]->interrupt == irq)
-                        return i;
-        }
-        return -1;
-}
-
 /*
  * 
  */
-irqreturn_t interrupt_handler(int interrupt, void *cardptr)
+irqreturn_t interrupt_handler(int dummy, void *card_inst)
 {
 
         RspMessage rcvmsg;
         int channel;
-        int card;
-
-        card = get_card_from_irq(interrupt);
+        int card = (int)(unsigned long) card_inst;
 
         if(!IS_VALID_CARD(card)) {
                 pr_debug("Invalid param: %d is not a valid card id\n", card);