diff options
Diffstat (limited to 'drivers/irqchip/irq-msi-lib.c')
| -rw-r--r-- | drivers/irqchip/irq-msi-lib.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/irqchip/irq-msi-lib.c b/drivers/irqchip/irq-msi-lib.c index d8e29fc0d406..246c30205af4 100644 --- a/drivers/irqchip/irq-msi-lib.c +++ b/drivers/irqchip/irq-msi-lib.c @@ -4,7 +4,7 @@ #include <linux/export.h> -#include "irq-msi-lib.h" +#include <linux/irqchip/irq-msi-lib.h> /** * msi_lib_init_dev_msi_info - Domain info setup for MSI domains @@ -28,6 +28,7 @@ bool msi_lib_init_dev_msi_info(struct device *dev, struct irq_domain *domain, struct msi_domain_info *info) { const struct msi_parent_ops *pops = real_parent->msi_parent_ops; + struct irq_chip *chip = info->chip; u32 required_flags; /* Parent ops available? */ @@ -92,10 +93,10 @@ bool msi_lib_init_dev_msi_info(struct device *dev, struct irq_domain *domain, info->flags |= required_flags; /* Chip updates for all child bus types */ - if (!info->chip->irq_eoi) - info->chip->irq_eoi = irq_chip_eoi_parent; - if (!info->chip->irq_ack) - info->chip->irq_ack = irq_chip_ack_parent; + if (!chip->irq_eoi && (pops->chip_flags & MSI_CHIP_FLAG_SET_EOI)) + chip->irq_eoi = irq_chip_eoi_parent; + if (!chip->irq_ack && (pops->chip_flags & MSI_CHIP_FLAG_SET_ACK)) + chip->irq_ack = irq_chip_ack_parent; /* * The device MSI domain can never have a set affinity callback. It @@ -104,8 +105,13 @@ bool msi_lib_init_dev_msi_info(struct device *dev, struct irq_domain *domain, * MSI message into the hardware which is the whole purpose of the * device MSI domain aside of mask/unmask which is provided e.g. by * PCI/MSI device domains. + * + * The exception to the rule is when the underlying domain + * tells you that affinity is not a thing -- for example when + * everything is muxed behind a single interrupt. */ - info->chip->irq_set_affinity = msi_domain_set_affinity; + if (!chip->irq_set_affinity && !(info->flags & MSI_FLAG_NO_AFFINITY)) + chip->irq_set_affinity = msi_domain_set_affinity; return true; } EXPORT_SYMBOL_GPL(msi_lib_init_dev_msi_info); |