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authorAndrew Morton <akpm@osdl.org>2006-04-27 18:39:18 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-04-28 08:33:46 -0700
commit13e87ec68641fd54f3fa04eef3419d034ed2115a (patch)
tree6779da58d91af198401cc3c1f6f4c81b8d5a7bb6
parent47bb789973fed504e4711ec34e63b84e6cbfb4e8 (diff)
[PATCH] request_irq(): remove warnings from irq probing
- Add new SA_PROBEIRQ which suppresses the new sharing-mismatch warning. Some drivers like to use request_irq() to find an unused interrupt slot. - Use it in i82365.c - Kill unused SA_PROBE. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/pcmcia/i82365.c7
-rw-r--r--include/asm-xtensa/signal.h2
-rw-r--r--include/linux/signal.h4
-rw-r--r--kernel/irq/manage.c6
4 files changed, 12 insertions, 7 deletions
diff --git a/drivers/pcmcia/i82365.c b/drivers/pcmcia/i82365.c
index bd0308e8981..a2f05f48515 100644
--- a/drivers/pcmcia/i82365.c
+++ b/drivers/pcmcia/i82365.c
@@ -509,7 +509,8 @@ static irqreturn_t i365_count_irq(int irq, void *dev, struct pt_regs *regs)
static u_int __init test_irq(u_short sock, int irq)
{
debug(2, " testing ISA irq %d\n", irq);
- if (request_irq(irq, i365_count_irq, 0, "scan", i365_count_irq) != 0)
+ if (request_irq(irq, i365_count_irq, SA_PROBEIRQ, "scan",
+ i365_count_irq) != 0)
return 1;
irq_hits = 0; irq_sock = sock;
msleep(10);
@@ -561,7 +562,7 @@ static u_int __init isa_scan(u_short sock, u_int mask0)
} else {
/* Fallback: just find interrupts that aren't in use */
for (i = 0; i < 16; i++)
- if ((mask0 & (1 << i)) && (_check_irq(i, 0) == 0))
+ if ((mask0 & (1 << i)) && (_check_irq(i, SA_PROBEIRQ) == 0))
mask1 |= (1 << i);
printk("default");
/* If scan failed, default to polled status */
@@ -725,7 +726,7 @@ static void __init add_pcic(int ns, int type)
u_int cs_mask = mask & ((cs_irq) ? (1<<cs_irq) : ~(1<<12));
for (cs_irq = 15; cs_irq > 0; cs_irq--)
if ((cs_mask & (1 << cs_irq)) &&
- (_check_irq(cs_irq, 0) == 0))
+ (_check_irq(cs_irq, SA_PROBEIRQ) == 0))
break;
if (cs_irq) {
grab_irq = 1;
diff --git a/include/asm-xtensa/signal.h b/include/asm-xtensa/signal.h
index 5d6fc9cdf58..a99c9aec64e 100644
--- a/include/asm-xtensa/signal.h
+++ b/include/asm-xtensa/signal.h
@@ -118,9 +118,9 @@ typedef struct {
* SA_INTERRUPT is also used by the irq handling routines.
* SA_SHIRQ is for shared interrupt support on PCI and EISA.
*/
-#define SA_PROBE SA_ONESHOT
#define SA_SAMPLE_RANDOM SA_RESTART
#define SA_SHIRQ 0x04000000
+#define SA_PROBEIRQ 0x08000000
#endif
#define SIG_BLOCK 0 /* for blocking signals */
diff --git a/include/linux/signal.h b/include/linux/signal.h
index 162a8fd10b2..70739f51a09 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -14,10 +14,12 @@
*
* SA_INTERRUPT is also used by the irq handling routines.
* SA_SHIRQ is for shared interrupt support on PCI and EISA.
+ * SA_PROBEIRQ is set by callers when they expect sharing mismatches to occur
*/
-#define SA_PROBE SA_ONESHOT
#define SA_SAMPLE_RANDOM SA_RESTART
#define SA_SHIRQ 0x04000000
+#define SA_PROBEIRQ 0x08000000
+
/*
* As above, these correspond to the IORESOURCE_IRQ_* defines in
* linux/ioport.h to select the interrupt line behaviour. When
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index ac766ad573e..1279e349953 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -246,8 +246,10 @@ int setup_irq(unsigned int irq, struct irqaction * new)
mismatch:
spin_unlock_irqrestore(&desc->lock, flags);
- printk(KERN_ERR "%s: irq handler mismatch\n", __FUNCTION__);
- dump_stack();
+ if (!(new->flags & SA_PROBEIRQ)) {
+ printk(KERN_ERR "%s: irq handler mismatch\n", __FUNCTION__);
+ dump_stack();
+ }
return -EBUSY;
}