From 6ef7f771de0182141ef1a0863f27b12963e1d184 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Fri, 10 Dec 2021 23:18:49 +0100 Subject: [PATCH] genirq/msi: Use PCI device property to determine whether this is MSI or MSIX instead of consulting MSI descriptors. Signed-off-by: Thomas Gleixner Tested-by: Michael Kelley Tested-by: Nishanth Menon Reviewed-by: Jason Gunthorpe Link: https://lore.kernel.org/r/20211210221813.434156196@linutronix.de --- kernel/irq/msi.c | 17 ++--------------- 1 file changed, 2 insertions(+), 15 deletions(-) diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index 4a7a7f0..b3f73ef 100644 --- 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"); } -- 2.7.4