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PCI/MSI: Remove unused pci_msi_create_default_irq_domain()

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pci_msi_create_default_irq_domain() is never called in the whole tree, so
remove it as well as all the supporting code for a default PCI MSI domain.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Christoph Hellwig 2017-02-08 18:17:43 +01:00 committed by Bjorn Helgaas
parent 3adfb572f2
commit 47feb41888
2 changed files with 2 additions and 51 deletions
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50
drivers/pci/msi.c
View File

@ -32,30 +32,11 @@ int pci_msi_ignore_mask;
#define msix_table_size(flags) ((flags & PCI_MSIX_FLAGS_QSIZE) + 1)
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
static struct irq_domain *pci_msi_default_domain;
static DEFINE_MUTEX(pci_msi_domain_lock);
struct irq_domain * __weak arch_get_pci_msi_domain(struct pci_dev *dev)
{
return pci_msi_default_domain;
}
static struct irq_domain *pci_msi_get_domain(struct pci_dev *dev)
{
struct irq_domain *domain;
domain = dev_get_msi_domain(&dev->dev);
if (domain)
return domain;
return arch_get_pci_msi_domain(dev);
}
static int pci_msi_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
struct irq_domain *domain;
domain = pci_msi_get_domain(dev);
domain = dev_get_msi_domain(&dev->dev);
if (domain && irq_domain_is_hierarchy(domain))
return pci_msi_domain_alloc_irqs(domain, dev, nvec, type);
@ -66,7 +47,7 @@ static void pci_msi_teardown_msi_irqs(struct pci_dev *dev)
{
struct irq_domain *domain;
domain = pci_msi_get_domain(dev);
domain = dev_get_msi_domain(&dev->dev);
if (domain && irq_domain_is_hierarchy(domain))
pci_msi_domain_free_irqs(domain, dev);
else
@ -1499,33 +1480,6 @@ void pci_msi_domain_free_irqs(struct irq_domain *domain, struct pci_dev *dev)
msi_domain_free_irqs(domain, &dev->dev);
}
/**
* pci_msi_create_default_irq_domain - Create a default MSI interrupt domain
* @fwnode: Optional fwnode of the interrupt controller
* @info: MSI domain info
* @parent: Parent irq domain
*
* Returns: A domain pointer or NULL in case of failure. If successful
* the default PCI/MSI irqdomain pointer is updated.
*/
struct irq_domain *pci_msi_create_default_irq_domain(struct fwnode_handle *fwnode,
struct msi_domain_info *info, struct irq_domain *parent)
{
struct irq_domain *domain;
mutex_lock(&pci_msi_domain_lock);
if (pci_msi_default_domain) {
pr_err("PCI: default irq domain for PCI MSI has already been created.\n");
domain = NULL;
} else {
domain = pci_msi_create_irq_domain(fwnode, info, parent);
pci_msi_default_domain = domain;
}
mutex_unlock(&pci_msi_domain_lock);
return domain;
}
static int get_msi_id_cb(struct pci_dev *pdev, u16 alias, void *data)
{
u32 *pa = data;

3
include/linux/msi.h
View File

@ -319,9 +319,6 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
int pci_msi_domain_alloc_irqs(struct irq_domain *domain, struct pci_dev *dev,
int nvec, int type);
void pci_msi_domain_free_irqs(struct irq_domain *domain, struct pci_dev *dev);
struct irq_domain *pci_msi_create_default_irq_domain(struct fwnode_handle *fwnode,
struct msi_domain_info *info, struct irq_domain *parent);
irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev,
struct msi_desc *desc);
int pci_msi_domain_check_cap(struct irq_domain *domain,