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iommu/vt-d: Use DEVICE_ATTR_RO macro

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Use DEVICE_ATTR_RO() helper instead of plain DEVICE_ATTR(),
which makes the code a bit shorter and easier to read.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210528130229.22108-1-yuehaibing@huawei.com
Link: https://lore.kernel.org/r/20210610020115.1637656-19-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
YueHaibing 2021-06-10 10:01:10 +08:00 committed by Joerg Roedel
parent 606636dcbd
commit 3bc770b0e9
1 changed files with 18 additions and 24 deletions
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42
drivers/iommu/intel/iommu.c
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@ -4139,62 +4139,56 @@ static inline struct intel_iommu *dev_to_intel_iommu(struct device *dev)
return container_of(iommu_dev, struct intel_iommu, iommu);
}
static ssize_t intel_iommu_show_version(struct device *dev,
struct device_attribute *attr,
char *buf)
static ssize_t version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct intel_iommu *iommu = dev_to_intel_iommu(dev);
u32 ver = readl(iommu->reg + DMAR_VER_REG);
return sprintf(buf, "%d:%d\n",
DMAR_VER_MAJOR(ver), DMAR_VER_MINOR(ver));
}
static DEVICE_ATTR(version, S_IRUGO, intel_iommu_show_version, NULL);
static DEVICE_ATTR_RO(version);
static ssize_t intel_iommu_show_address(struct device *dev,
struct device_attribute *attr,
char *buf)
static ssize_t address_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct intel_iommu *iommu = dev_to_intel_iommu(dev);
return sprintf(buf, "%llx\n", iommu->reg_phys);
}
static DEVICE_ATTR(address, S_IRUGO, intel_iommu_show_address, NULL);
static DEVICE_ATTR_RO(address);
static ssize_t intel_iommu_show_cap(struct device *dev,
struct device_attribute *attr,
char *buf)
static ssize_t cap_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct intel_iommu *iommu = dev_to_intel_iommu(dev);
return sprintf(buf, "%llx\n", iommu->cap);
}
static DEVICE_ATTR(cap, S_IRUGO, intel_iommu_show_cap, NULL);
static DEVICE_ATTR_RO(cap);
static ssize_t intel_iommu_show_ecap(struct device *dev,
struct device_attribute *attr,
char *buf)
static ssize_t ecap_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct intel_iommu *iommu = dev_to_intel_iommu(dev);
return sprintf(buf, "%llx\n", iommu->ecap);
}
static DEVICE_ATTR(ecap, S_IRUGO, intel_iommu_show_ecap, NULL);
static DEVICE_ATTR_RO(ecap);
static ssize_t intel_iommu_show_ndoms(struct device *dev,
struct device_attribute *attr,
char *buf)
static ssize_t domains_supported_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct intel_iommu *iommu = dev_to_intel_iommu(dev);
return sprintf(buf, "%ld\n", cap_ndoms(iommu->cap));
}
static DEVICE_ATTR(domains_supported, S_IRUGO, intel_iommu_show_ndoms, NULL);
static DEVICE_ATTR_RO(domains_supported);
static ssize_t intel_iommu_show_ndoms_used(struct device *dev,
struct device_attribute *attr,
char *buf)
static ssize_t domains_used_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct intel_iommu *iommu = dev_to_intel_iommu(dev);
return sprintf(buf, "%d\n", bitmap_weight(iommu->domain_ids,
cap_ndoms(iommu->cap)));
}
static DEVICE_ATTR(domains_used, S_IRUGO, intel_iommu_show_ndoms_used, NULL);
static DEVICE_ATTR_RO(domains_used);
static struct attribute *intel_iommu_attrs[] = {
&dev_attr_version.attr,