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[IA64] Fix registered interrupt check 

Fix the problem that interrupts are not initialized correctly at PCI
hotplug or driver reloading time.

By vector domain change, the iosapic_rte_info structure was changed to
be on the iosapic_intr_info[irq].rtes list even after the interrupts
are unregistered. So iosapic_intr_info[irq].rtes list must not be
checked to see if there are registered interrupts (RTEs) on the
irq. We must check iosapic_intr_info[irq].count counter instead.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Kenji Kaneshige 2007-07-30 11:54:41 +09:00 committed by Tony Luck
parent 1b30859b8d
commit c4c376f7e1
1 changed files with 6 additions and 6 deletions
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12
arch/ia64/kernel/iosapic.c
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@ -142,7 +142,7 @@ struct iosapic_rte_info {
static struct iosapic_intr_info {
struct list_head rtes; /* RTEs using this vector (empty =>
* not an IOSAPIC interrupt) */
int count; /* # of RTEs that shares this vector */
int count; /* # of registered RTEs */
u32 low32; /* current value of low word of
* Redirection table entry */
unsigned int dest; /* destination CPU physical ID */
@ -313,7 +313,7 @@ mask_irq (unsigned int irq)
int rte_index;
struct iosapic_rte_info *rte;
if (list_empty(&iosapic_intr_info[irq].rtes))
if (!iosapic_intr_info[irq].count)
return; /* not an IOSAPIC interrupt! */
/* set only the mask bit */
@ -331,7 +331,7 @@ unmask_irq (unsigned int irq)
int rte_index;
struct iosapic_rte_info *rte;
if (list_empty(&iosapic_intr_info[irq].rtes))
if (!iosapic_intr_info[irq].count)
return; /* not an IOSAPIC interrupt! */
low32 = iosapic_intr_info[irq].low32 &= ~IOSAPIC_MASK;
@ -363,7 +363,7 @@ iosapic_set_affinity (unsigned int irq, cpumask_t mask)
dest = cpu_physical_id(first_cpu(mask));
if (list_empty(&iosapic_intr_info[irq].rtes))
if (!iosapic_intr_info[irq].count)
return; /* not an IOSAPIC interrupt */
set_irq_affinity_info(irq, dest, redir);
@ -542,7 +542,7 @@ iosapic_reassign_vector (int irq)
{
int new_irq;
if (!list_empty(&iosapic_intr_info[irq].rtes)) {
if (iosapic_intr_info[irq].count) {
new_irq = create_irq();
if (new_irq < 0)
panic("%s: out of interrupt vectors!\n", __FUNCTION__);
@ -677,7 +677,7 @@ get_target_cpu (unsigned int gsi, int irq)
* In case of vector shared by multiple RTEs, all RTEs that
* share the vector need to use the same destination CPU.
*/
if (!list_empty(&iosapic_intr_info[irq].rtes))
if (iosapic_intr_info[irq].count)
return iosapic_intr_info[irq].dest;
/*