| From | Thomas Gleixner <> | Subject | [patch V3 04/35] genirq/msi: Use PCI device property | Date | Fri, 10 Dec 2021 23:18:49 +0100 (CET) |
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From: Thomas Gleixner <tglx@linutronix.de>
to determine whether this is MSI or MSIX instead of consulting MSI descriptors.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- V2: Use PCI device property - Jason --- kernel/irq/msi.c | 17 ++--------------- 1 file changed, 2 insertions(+), 15 deletions(-)
--- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -77,21 +77,8 @@ EXPORT_SYMBOL_GPL(get_cached_msi_msg); static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct msi_desc *entry; - bool is_msix = false; - unsigned long irq; - int retval; - - retval = kstrtoul(attr->attr.name, 10, &irq); - if (retval) - return retval; - - entry = irq_get_msi_desc(irq); - if (!entry) - return -ENODEV; - - if (dev_is_pci(dev)) - is_msix = entry->pci.msi_attrib.is_msix; + /* MSI vs. MSIX is per device not per interrupt */ + bool is_msix = dev_is_pci(dev) ? to_pci_dev(dev)->msix_enabled : false; return sysfs_emit(buf, "%s\n", is_msix ? "msix" : "msi"); }
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