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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-03-17 01:49:08 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-03-17 01:49:08 +0300
commitca5b74d2675a44f54aacb919c1cf022463e2f738 (patch)
tree08081e436bfed580e7f5a059faa1c77da3dbd58e /drivers/iommu
parentce793486e23e0162a732c605189c8028e0910e86 (diff)
downloadlinux-ca5b74d2675a44f54aacb919c1cf022463e2f738.tar.xz
ACPI: Introduce has_acpi_companion()
Now that the ACPI companions of devices are represented by pointers to struct fwnode_handle, it is not quite efficient to check whether or not an ACPI companion of a device is present by evaluating the ACPI_COMPANION() macro. For this reason, introduce a special static inline routine for that, has_acpi_companion(), and update the code to use it where applicable. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel-iommu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index ae4c1a854e57..591b84331315 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -684,7 +684,7 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf
if (dev_is_pci(dev)) {
pdev = to_pci_dev(dev);
segment = pci_domain_nr(pdev->bus);
- } else if (ACPI_COMPANION(dev))
+ } else if (has_acpi_companion(dev))
dev = &ACPI_COMPANION(dev)->dev;
rcu_read_lock();