diff options
Diffstat (limited to 'arch/ia64/sn/kernel')
-rw-r--r-- | arch/ia64/sn/kernel/irq.c | 50 |
1 files changed, 28 insertions, 22 deletions
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c index 84d276a14ecb..af061dba246f 100644 --- a/arch/ia64/sn/kernel/irq.c +++ b/arch/ia64/sn/kernel/irq.c @@ -317,6 +317,16 @@ void sn_irq_unfixup(struct pci_dev *pci_dev) pci_dev_put(pci_dev); } +static inline void +sn_call_force_intr_provider(struct sn_irq_info *sn_irq_info) +{ + struct sn_pcibus_provider *pci_provider; + + pci_provider = sn_pci_provider[sn_irq_info->irq_bridge_type]; + if (pci_provider && pci_provider->force_interrupt) + (*pci_provider->force_interrupt)(sn_irq_info); +} + static void force_interrupt(int irq) { struct sn_irq_info *sn_irq_info; @@ -325,11 +335,9 @@ static void force_interrupt(int irq) return; rcu_read_lock(); - list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[irq], list) { - if (IS_PCI_BRIDGE_ASIC(sn_irq_info->irq_bridge_type) && - (sn_irq_info->irq_bridge != NULL)) - pcibr_force_interrupt(sn_irq_info); - } + list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[irq], list) + sn_call_force_intr_provider(sn_irq_info); + rcu_read_unlock(); } @@ -351,6 +359,14 @@ static void sn_check_intr(int irq, struct sn_irq_info *sn_irq_info) struct pcidev_info *pcidev_info; struct pcibus_info *pcibus_info; + /* + * Bridge types attached to TIO (anything but PIC) do not need this WAR + * since they do not target Shub II interrupt registers. If that + * ever changes, this check needs to accomodate. + */ + if (sn_irq_info->irq_bridge_type != PCIIO_ASIC_TYPE_PIC) + return; + pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; if (!pcidev_info) return; @@ -377,16 +393,12 @@ static void sn_check_intr(int irq, struct sn_irq_info *sn_irq_info) break; } if (!test_bit(irr_bit, &irr_reg)) { - if (!test_bit(irq, pda->sn_soft_irr)) { - if (!test_bit(irq, pda->sn_in_service_ivecs)) { - regval &= 0xff; - if (sn_irq_info->irq_int_bit & regval & - sn_irq_info->irq_last_intr) { - regval &= - ~(sn_irq_info-> - irq_int_bit & regval); - pcibr_force_interrupt(sn_irq_info); - } + if (!test_bit(irq, pda->sn_in_service_ivecs)) { + regval &= 0xff; + if (sn_irq_info->irq_int_bit & regval & + sn_irq_info->irq_last_intr) { + regval &= ~(sn_irq_info->irq_int_bit & regval); + sn_call_force_intr_provider(sn_irq_info); } } } @@ -404,13 +416,7 @@ void sn_lb_int_war_check(void) rcu_read_lock(); for (i = pda->sn_first_irq; i <= pda->sn_last_irq; i++) { list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[i], list) { - /* - * Only call for PCI bridges that are fully - * initialized. - */ - if (IS_PCI_BRIDGE_ASIC(sn_irq_info->irq_bridge_type) && - (sn_irq_info->irq_bridge != NULL)) - sn_check_intr(i, sn_irq_info); + sn_check_intr(i, sn_irq_info); } } rcu_read_unlock(); |