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authorJoerg Roedel <jroedel@suse.de>2014-05-20 23:18:22 +0200
committerJoerg Roedel <jroedel@suse.de>2014-05-26 11:28:12 +0200
commitb87d2d7c0b3507b6b17590d741b5be01e8a21b84 (patch)
tree71e653c1702decd937f23ecae64169191d3ac455 /drivers/iommu/amd_iommu_v2.c
parent4b660a7f5c8099d88d1a43d8ae138965112592c7 (diff)
downloadlinux-b87d2d7c0b3507b6b17590d741b5be01e8a21b84.tar.bz2
iommu/amd: Don't access IOMMUv2 state_table directly
This is a preparation for converting the state_table into a state_list. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Jay Cornwall <Jay.Cornwall@amd.com>
Diffstat (limited to 'drivers/iommu/amd_iommu_v2.c')
-rw-r--r--drivers/iommu/amd_iommu_v2.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c
index 203b2e6a91cf..5db3675cad76 100644
--- a/drivers/iommu/amd_iommu_v2.c
+++ b/drivers/iommu/amd_iommu_v2.c
@@ -111,13 +111,18 @@ static u16 device_id(struct pci_dev *pdev)
return devid;
}
+static struct device_state *__get_device_state(u16 devid)
+{
+ return state_table[devid];
+}
+
static struct device_state *get_device_state(u16 devid)
{
struct device_state *dev_state;
unsigned long flags;
spin_lock_irqsave(&state_lock, flags);
- dev_state = state_table[devid];
+ dev_state = __get_device_state(devid);
if (dev_state != NULL)
atomic_inc(&dev_state->count);
spin_unlock_irqrestore(&state_lock, flags);
@@ -841,7 +846,7 @@ void amd_iommu_free_device(struct pci_dev *pdev)
spin_lock_irqsave(&state_lock, flags);
- dev_state = state_table[devid];
+ dev_state = __get_device_state(devid);
if (dev_state == NULL) {
spin_unlock_irqrestore(&state_lock, flags);
return;
@@ -874,7 +879,7 @@ int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev,
spin_lock_irqsave(&state_lock, flags);
ret = -EINVAL;
- dev_state = state_table[devid];
+ dev_state = __get_device_state(devid);
if (dev_state == NULL)
goto out_unlock;
@@ -905,7 +910,7 @@ int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev,
spin_lock_irqsave(&state_lock, flags);
ret = -EINVAL;
- dev_state = state_table[devid];
+ dev_state = __get_device_state(devid);
if (dev_state == NULL)
goto out_unlock;