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iommu/amd: Make call-sites of get_device_id aware of its return value 

This patch is to make the call-sites of get_device_id aware of its
return value.

Signed-off-by: Wan Zongshun <Vincent.Wan@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Wan Zongshun 2016-04-01 09:06:02 -04:00 committed by Joerg Roedel
parent ca3bf5d47c
commit 7aba6cb9ee
1 changed files with 41 additions and 10 deletions
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51
drivers/iommu/amd_iommu.c
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@ -279,9 +279,11 @@ static void init_unity_mappings_for_device(struct device *dev,
struct dma_ops_domain *dma_dom)
{
struct unity_map_entry *e;
u16 devid;
int devid;
devid = get_device_id(dev);
if (IS_ERR_VALUE(devid))
return;
list_for_each_entry(e, &amd_iommu_unity_map, list) {
if (!(devid >= e->devid_start && devid <= e->devid_end))
@ -296,7 +298,7 @@ static void init_unity_mappings_for_device(struct device *dev,
*/
static bool check_device(struct device *dev)
{
u16 devid;
int devid;
if (!dev || !dev->dma_mask)
return false;
@ -306,6 +308,8 @@ static bool check_device(struct device *dev)
return false;
devid = get_device_id(dev);
if (IS_ERR_VALUE(devid))
return false;
/* Out of our scope? */
if (devid > amd_iommu_last_bdf)
@ -342,11 +346,16 @@ static int iommu_init_device(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct iommu_dev_data *dev_data;
int devid;
if (dev->archdata.iommu)
return 0;
dev_data = find_dev_data(get_device_id(dev));
devid = get_device_id(dev);
if (IS_ERR_VALUE(devid))
return devid;
dev_data = find_dev_data(devid);
if (!dev_data)
return -ENOMEM;
@ -367,9 +376,13 @@ static int iommu_init_device(struct device *dev)
static void iommu_ignore_device(struct device *dev)
{
u16 devid, alias;
u16 alias;
int devid;
devid = get_device_id(dev);
if (IS_ERR_VALUE(devid))
return;
alias = amd_iommu_alias_table[devid];
memset(&amd_iommu_dev_table[devid], 0, sizeof(struct dev_table_entry));
@ -381,8 +394,14 @@ static void iommu_ignore_device(struct device *dev)
static void iommu_uninit_device(struct device *dev)
{
struct iommu_dev_data *dev_data = search_dev_data(get_device_id(dev));
int devid;
struct iommu_dev_data *dev_data;
devid = get_device_id(dev);
if (IS_ERR_VALUE(devid))
return;
dev_data = search_dev_data(devid);
if (!dev_data)
return;
@ -2314,13 +2333,15 @@ static int amd_iommu_add_device(struct device *dev)
struct iommu_dev_data *dev_data;
struct iommu_domain *domain;
struct amd_iommu *iommu;
u16 devid;
int ret;
int ret, devid;
if (!check_device(dev) || get_dev_data(dev))
return 0;
devid = get_device_id(dev);
if (IS_ERR_VALUE(devid))
return devid;
iommu = amd_iommu_rlookup_table[devid];
ret = iommu_init_device(dev);
@ -2358,12 +2379,15 @@ out:
static void amd_iommu_remove_device(struct device *dev)
{
struct amd_iommu *iommu;
u16 devid;
int devid;
if (!check_device(dev))
return;
devid = get_device_id(dev);
if (IS_ERR_VALUE(devid))
return;
iommu = amd_iommu_rlookup_table[devid];
iommu_uninit_device(dev);
@ -3035,12 +3059,14 @@ static void amd_iommu_detach_device(struct iommu_domain *dom,
{
struct iommu_dev_data *dev_data = dev->archdata.iommu;
struct amd_iommu *iommu;
u16 devid;
int devid;
if (!check_device(dev))
return;
devid = get_device_id(dev);
if (IS_ERR_VALUE(devid))
return;
if (dev_data->domain != NULL)
detach_device(dev);
@ -3158,9 +3184,11 @@ static void amd_iommu_get_dm_regions(struct device *dev,
struct list_head *head)
{
struct unity_map_entry *entry;
u16 devid;
int devid;
devid = get_device_id(dev);
if (IS_ERR_VALUE(devid))
return;
list_for_each_entry(entry, &amd_iommu_unity_map, list) {
struct iommu_dm_region *region;
@ -3862,6 +3890,9 @@ static struct irq_domain *get_irq_domain(struct irq_alloc_info *info)
case X86_IRQ_ALLOC_TYPE_MSI:
case X86_IRQ_ALLOC_TYPE_MSIX:
devid = get_device_id(&info->msi_dev->dev);
if (IS_ERR_VALUE(devid))
return NULL;
iommu = amd_iommu_rlookup_table[devid];
if (iommu)
return iommu->msi_domain;