Commit 13e87ec6 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds

[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: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 47bb7899
......@@ -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;
......
......@@ -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 */
......
......@@ -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
......
......@@ -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;
}
......
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