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iommu/vt-d: Remove unnecessary local variable initializations

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A local variable initialization is a hint that the variable will be used in
an unusual way.  If the initialization is unnecessary, that hint becomes a
distraction.

Remove unnecessary initializations.  No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Bjorn Helgaas 2019-02-08 16:06:08 -06:00 committed by Joerg Roedel
parent 932a6523ce
commit e083ea5b02
1 changed files with 13 additions and 14 deletions
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27
drivers/iommu/intel-iommu.c
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@ -865,7 +865,7 @@ static void free_context_table(struct intel_iommu *iommu)
static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
unsigned long pfn, int *target_level)
{
struct dma_pte *parent, *pte = NULL;
struct dma_pte *parent, *pte;
int level = agaw_to_level(domain->agaw);
int offset;
@ -922,7 +922,7 @@ static struct dma_pte *dma_pfn_level_pte(struct dmar_domain *domain,
unsigned long pfn,
int level, int *large_page)
{
struct dma_pte *parent, *pte = NULL;
struct dma_pte *parent, *pte;
int total = agaw_to_level(domain->agaw);
int offset;
@ -954,7 +954,7 @@ static void dma_pte_clear_range(struct dmar_domain *domain,
unsigned long start_pfn,
unsigned long last_pfn)
{
unsigned int large_page = 1;
unsigned int large_page;
struct dma_pte *first_pte, *pte;
BUG_ON(!domain_pfn_supported(domain, start_pfn));
@ -1132,7 +1132,7 @@ static struct page *domain_unmap(struct dmar_domain *domain,
unsigned long start_pfn,
unsigned long last_pfn)
{
struct page *freelist = NULL;
struct page *freelist;
BUG_ON(!domain_pfn_supported(domain, start_pfn));
BUG_ON(!domain_pfn_supported(domain, last_pfn));
@ -1763,7 +1763,7 @@ static int domain_attach_iommu(struct dmar_domain *domain,
static int domain_detach_iommu(struct dmar_domain *domain,
struct intel_iommu *iommu)
{
int num, count = INT_MAX;
int num, count;
assert_spin_locked(&device_domain_lock);
assert_spin_locked(&iommu->lock);
@ -1902,7 +1902,7 @@ static int domain_init(struct dmar_domain *domain, struct intel_iommu *iommu,
static void domain_exit(struct dmar_domain *domain)
{
struct page *freelist = NULL;
struct page *freelist;
/* Domain 0 is reserved, so dont process it */
if (!domain)
@ -2583,7 +2583,7 @@ static int get_last_alias(struct pci_dev *pdev, u16 alias, void *opaque)
static struct dmar_domain *find_or_alloc_domain(struct device *dev, int gaw)
{
struct device_domain_info *info = NULL;
struct device_domain_info *info;
struct dmar_domain *domain = NULL;
struct intel_iommu *iommu;
u16 dma_alias;
@ -2807,7 +2807,7 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width);
static int __init si_domain_init(int hw)
{
int nid, ret = 0;
int nid, ret;
si_domain = alloc_domain(DOMAIN_FLAG_STATIC_IDENTITY);
if (!si_domain)
@ -2931,7 +2931,6 @@ static bool device_is_rmrr_locked(struct device *dev)
static int iommu_should_identity_map(struct device *dev, int startup)
{
if (dev_is_pci(dev)) {
struct pci_dev *pdev = to_pci_dev(dev);
@ -3527,7 +3526,7 @@ static unsigned long intel_alloc_iova(struct device *dev,
struct dmar_domain *domain,
unsigned long nrpages, uint64_t dma_mask)
{
unsigned long iova_pfn = 0;
unsigned long iova_pfn;
/* Restrict dma_mask to the width that the iommu can handle */
dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
@ -4342,7 +4341,7 @@ int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg)
static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
{
int sp, ret = 0;
int sp, ret;
struct intel_iommu *iommu = dmaru->iommu;
if (g_iommus[iommu->seq_id])
@ -4506,7 +4505,7 @@ int dmar_find_matched_atsr_unit(struct pci_dev *dev)
int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
{
int ret = 0;
int ret;
struct dmar_rmrr_unit *rmrru;
struct dmar_atsr_unit *atsru;
struct acpi_dmar_atsr *atsr;
@ -4523,7 +4522,7 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
((void *)rmrr) + rmrr->header.length,
rmrr->segment, rmrru->devices,
rmrru->devices_cnt);
if(ret < 0)
if (ret < 0)
return ret;
} else if (info->event == BUS_NOTIFY_REMOVED_DEVICE) {
dmar_remove_dev_scope(info, rmrr->segment,
@ -4543,7 +4542,7 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
atsru->devices_cnt);
if (ret > 0)
break;
else if(ret < 0)
else if (ret < 0)
return ret;
} else if (info->event == BUS_NOTIFY_REMOVED_DEVICE) {
if (dmar_remove_dev_scope(info, atsr->segment,