Commit 6ef7f771 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

genirq/msi: Use PCI device property 



to determine whether this is MSI or MSIX instead of consulting MSI
descriptors.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarMichael Kelley <mikelley@microsoft.com>
Tested-by: default avatarNishanth Menon <nm@ti.com>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.434156196@linutronix.de
parent b3f82364

kernel/irq/msi.c

+2 −15
Original line number Diff line number Diff line
@@ -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");

}