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genirq/msi: Use PCI device property

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

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.434156196@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-12-10 23:18:49 +01:00
parent b3f8236411
commit 6ef7f771de
1 changed files with 2 additions and 15 deletions
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17
kernel/irq/msi.c
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@ -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");
}