[patch 37/39] PCI/MSI: Remove redundant msi_check() callback

Thomas Gleixner
2022-11-11T13:58:16Z

All these sanity checks are now done _before_ any allocation work
happens. No point in doing it twice.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
drivers/pci/msi/irqdomain.c | 48 --------------------------------------------
1 file changed, 48 deletions(-)

--- a/drivers/pci/msi/irqdomain.c
+++ b/drivers/pci/msi/irqdomain.c
@@ -64,51 +64,6 @@ static irq_hw_number_t pci_msi_domain_ca
(pci_domain_nr(dev->bus) & 0xFFFFFFFF) << 27;
}

-static inline bool pci_msi_desc_is_multi_msi(struct msi_desc *desc)
-{
- return !desc->pci.msi_attrib.is_msix && desc->nvec_used > 1;
-}
-
-/**
- * pci_msi_domain_check_cap - Verify that @domain supports the capabilities
- * for @dev
- * @domain: The interrupt domain to check
- * @info: The domain info for verification
- * @dev: The device to check
- *
- * Returns:
- * 0 if the functionality is supported
- * 1 if Multi MSI is requested, but the domain does not support it
- * -ENOTSUPP otherwise
- */
-static int pci_msi_domain_check_cap(struct irq_domain *domain,
- struct msi_domain_info *info,
- struct device *dev)
-{
- struct msi_desc *desc = msi_first_desc(dev, MSI_DESC_ALL);
-
- /* Special handling to support __pci_enable_msi_range() */
- if (pci_msi_desc_is_multi_msi(desc) &&
- !(info->flags & MSI_FLAG_MULTI_PCI_MSI))
- return 1;
-
- if (desc->pci.msi_attrib.is_msix) {
- if (!(info->flags & MSI_FLAG_PCI_MSIX))
- return -ENOTSUPP;
-
- if (info->flags & MSI_FLAG_MSIX_CONTIGUOUS) {
- unsigned int idx = 0;
-
- /* Check for gaps in the entry indices */
- msi_for_each_desc(desc, dev, MSI_DESC_ALL) {
- if (desc->msi_index != idx++)
- return -ENOTSUPP;
- }
- }
- }
- return 0;
-}
-
static void pci_msi_domain_set_desc(msi_alloc_info_t *arg,
struct msi_desc *desc)
{
@@ -118,7 +73,6 @@ static void pci_msi_domain_set_desc(msi_

static struct msi_domain_ops pci_msi_domain_ops_default = {
.set_desc = pci_msi_domain_set_desc,
- .msi_check = pci_msi_domain_check_cap,
};

static void pci_msi_domain_update_dom_ops(struct msi_domain_info *info)
@@ -130,8 +84,6 @@ static void pci_msi_domain_update_dom_op
} else {
if (ops->set_desc == NULL)
ops->set_desc = pci_msi_domain_set_desc;
- if (ops->msi_check == NULL)
- ops->msi_check = pci_msi_domain_check_cap;
}
}