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>
static struct iosapic_intr_info {
struct list_head rtes; /* RTEs using this vector (empty =>
* not an IOSAPIC interrupt) */
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 */
u32 low32; /* current value of low word of
* Redirection table entry */
unsigned int dest; /* destination CPU physical ID */
int rte_index;
struct iosapic_rte_info *rte;
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 */
return; /* not an IOSAPIC interrupt! */
/* set only the mask bit */
int rte_index;
struct iosapic_rte_info *rte;
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;
return; /* not an IOSAPIC interrupt! */
low32 = iosapic_intr_info[irq].low32 &= ~IOSAPIC_MASK;
dest = cpu_physical_id(first_cpu(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);
return; /* not an IOSAPIC interrupt */
set_irq_affinity_info(irq, dest, redir);
- 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__);
new_irq = create_irq();
if (new_irq < 0)
panic("%s: out of interrupt vectors!\n", __FUNCTION__);
* In case of vector shared by multiple RTEs, all RTEs that
* share the vector need to use the same destination CPU.
*/
* 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;
/*
return iosapic_intr_info[irq].dest;
/*