提交 b7a42b9d 编写于 作者: J Joerg Roedel

iommu/amd: Fix crash when accessing AMD-Vi sysfs entries

The link between the iommu sysfs-device and the struct
amd_iommu is no longer stored as driver-data. Update the
code to the new correct way of getting from device to
amd_iommu.
Reported-by: NDave Jones <davej@codemonkey.org.uk>
Fixes: 39ab9555 ('iommu: Add sysfs bindings for struct iommu_device')
Signed-off-by: NJoerg Roedel <jroedel@suse.de>
上级 a7fdb6e6
......@@ -1507,7 +1507,7 @@ static ssize_t amd_iommu_show_cap(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct amd_iommu *iommu = dev_get_drvdata(dev);
struct amd_iommu *iommu = dev_to_amd_iommu(dev);
return sprintf(buf, "%x\n", iommu->cap);
}
static DEVICE_ATTR(cap, S_IRUGO, amd_iommu_show_cap, NULL);
......@@ -1516,7 +1516,7 @@ static ssize_t amd_iommu_show_features(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct amd_iommu *iommu = dev_get_drvdata(dev);
struct amd_iommu *iommu = dev_to_amd_iommu(dev);
return sprintf(buf, "%llx\n", iommu->features);
}
static DEVICE_ATTR(features, S_IRUGO, amd_iommu_show_features, NULL);
......
......@@ -569,6 +569,11 @@ struct amd_iommu {
volatile u64 __aligned(8) cmd_sem;
};
static inline struct amd_iommu *dev_to_amd_iommu(struct device *dev)
{
return container_of(dev, struct amd_iommu, iommu.dev);
}
#define ACPIHID_UID_LEN 256
#define ACPIHID_HID_LEN 9
......
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