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authorJoerg Roedel <jroedel@suse.de>2017-02-28 13:57:18 +0100
committerJoerg Roedel <jroedel@suse.de>2017-02-28 15:48:15 +0100
commita7fdb6e648fb10a4174483b5fc4dac9c25bd2093 (patch)
tree5e6910bf154bc26668a4bedf808c7f5a07f6731e /drivers/iommu
parent86292b33d4b79ee03e2f43ea0381ef85f077c760 (diff)
downloadlinux-a7fdb6e648fb10a4174483b5fc4dac9c25bd2093.tar.bz2
iommu/vt-d: Fix crash when accessing VT-d sysfs entries
The link between the iommu sysfs-device and the struct intel_iommu is no longer stored as driver-data. Update the code to use the new access method. Reported-by: Dave Jones <davej@codemonkey.org.uk> Fixes: 39ab9555c241 ('iommu: Add sysfs bindings for struct iommu_device') Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel-iommu.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a8f7ae0eb7a4..238ad3447712 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4730,11 +4730,16 @@ static int intel_iommu_cpu_dead(unsigned int cpu)
return 0;
}
+static inline struct intel_iommu *dev_to_intel_iommu(struct device *dev)
+{
+ return container_of(dev, struct intel_iommu, iommu.dev);
+}
+
static ssize_t intel_iommu_show_version(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct intel_iommu *iommu = dev_get_drvdata(dev);
+ 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));
@@ -4745,7 +4750,7 @@ static ssize_t intel_iommu_show_address(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct intel_iommu *iommu = dev_get_drvdata(dev);
+ 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);
@@ -4754,7 +4759,7 @@ static ssize_t intel_iommu_show_cap(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct intel_iommu *iommu = dev_get_drvdata(dev);
+ 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);
@@ -4763,7 +4768,7 @@ static ssize_t intel_iommu_show_ecap(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct intel_iommu *iommu = dev_get_drvdata(dev);
+ 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);
@@ -4772,7 +4777,7 @@ static ssize_t intel_iommu_show_ndoms(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct intel_iommu *iommu = dev_get_drvdata(dev);
+ 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);
@@ -4781,7 +4786,7 @@ static ssize_t intel_iommu_show_ndoms_used(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct intel_iommu *iommu = dev_get_drvdata(dev);
+ struct intel_iommu *iommu = dev_to_intel_iommu(dev);
return sprintf(buf, "%d\n", bitmap_weight(iommu->domain_ids,
cap_ndoms(iommu->cap)));
}