>From 3545aba9f138bd233264c151d8c32cd417bfb09f Mon Sep 17 00:00:00 2001 From: Sinan Kaya Date: Tue, 27 Sep 2016 18:35:15 -0400 Subject: [PATCH] acpi: pci_link: debug aids v2 Change-Id: I6c459cb5888d95f5f1ef7c0e2f138fb9c65f40e5 --- drivers/acpi/pci_link.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c index c983bf7..92a6506 100644 --- a/drivers/acpi/pci_link.c +++ b/drivers/acpi/pci_link.c @@ -508,6 +508,8 @@ static int acpi_irq_get_penalty(int irq) penalty += PIRQ_PENALTY_ISA_ALWAYS; else penalty += PIRQ_PENALTY_PCI_USING; + + pr_info("%s:%d adding SCI penalty: 0x%x \n", __func__, __LINE__, penalty); } if (irq < ACPI_MAX_ISA_IRQS) @@ -592,6 +594,10 @@ static int acpi_pci_link_allocate(struct acpi_pci_link *link) else irq = link->irq.possible[link->irq.possible_count - 1]; + pr_info("irq : %d\n", irq); + pr_info("acpi_irq_balance : %d\n", acpi_irq_balance); + pr_info("link->irq.active : %d\n", link->irq.active); + pr_info("acpi_gbl_FADT.sci_interrupt : %d\n", acpi_gbl_FADT.sci_interrupt); if (acpi_irq_balance || !link->irq.active) { /* * Select the best IRQ. This is done in reverse to promote @@ -599,11 +605,22 @@ static int acpi_pci_link_allocate(struct acpi_pci_link *link) */ for (i = (link->irq.possible_count - 1); i >= 0; i--) { if (acpi_irq_get_penalty(irq) > - acpi_irq_get_penalty(link->irq.possible[i])) + acpi_irq_get_penalty(link->irq.possible[i])) { + pr_info("acpi_irq_get_penalty(%d) : 0x%x\n", link->irq.possible[i], acpi_irq_get_penalty(link->irq.possible[i])); + pr_info("acpi_irq_get_penalty(%d) : 0x%x\n", irq, acpi_irq_get_penalty(irq)); irq = link->irq.possible[i]; + } } } if (acpi_irq_get_penalty(irq) >= PIRQ_PENALTY_ISA_ALWAYS) { + for (i = (link->irq.possible_count - 1); i >= 0; i--) { + pr_info("penalty[%d] = 0x%x\n", + link->irq.possible[i], + acpi_irq_get_penalty(link->irq.possible[i])); + } + pr_info("irq : %d\n", irq); + pr_info("acpi_gbl_FADT.sci_interrupt : %d\n", acpi_gbl_FADT.sci_interrupt); + printk(KERN_ERR PREFIX "No IRQ available for %s [%s]. " "Try pci=noacpi or acpi=off\n", acpi_device_name(link->device), @@ -870,9 +887,12 @@ static int __init acpi_irq_penalty_update(char *str, int used) */ void acpi_penalize_isa_irq(int irq, int active) { - if ((irq >= 0) && (irq < ARRAY_SIZE(acpi_isa_irq_penalty))) + if ((irq >= 0) && (irq < ARRAY_SIZE(acpi_isa_irq_penalty))) { acpi_isa_irq_penalty[irq] = acpi_irq_get_penalty(irq) + (active ? PIRQ_PENALTY_ISA_USED : PIRQ_PENALTY_PCI_USING); + pr_info("%s:%d acpi_isa_irq_penalty[%d]=0x%x active = %d\n", __func__, + __LINE__, irq, acpi_irq_get_penalty(irq), active); + } } bool acpi_isa_irq_available(int irq) -- 1.9.1