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PCI/IA64: fix memleak for create pci root bus fail 

If pci_create_root_bus() return fail, we should release
pci root info, pci controller etc.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Tony Luck <tony.luck@intel.com>
hifive-unleashed-5.1
Jiang Liu 2013-06-06 15:34:50 +08:00 committed by Tony Luck
parent 429ac0995e
commit c9e391cf1b
2 changed files with 65 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/ia64/include/asm/pci.h
View File

@ -89,6 +89,11 @@ extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
#define pci_legacy_read platform_pci_legacy_read
#define pci_legacy_write platform_pci_legacy_write
struct iospace_resource {
struct list_head list;
struct resource res;
};
struct pci_controller {
void *acpi_handle;
void *iommu;

74
arch/ia64/pci/pci.c
View File

@ -137,6 +137,7 @@ struct pci_root_info {
struct resource *res;
resource_size_t *res_offset;
unsigned int res_num;
struct list_head io_resources;
char *name;
};
@ -171,25 +172,21 @@ new_space (u64 phys_base, int sparse)
static u64 add_io_space(struct pci_root_info *info,
struct acpi_resource_address64 *addr)
{
struct iospace_resource *iospace;
struct resource *resource;
char *name;
unsigned long base, min, max, base_port;
unsigned int sparse = 0, space_nr, len;
resource = kzalloc(sizeof(*resource), GFP_KERNEL);
if (!resource) {
len = strlen(info->name) + 32;
iospace = kzalloc(sizeof(*iospace) + len, GFP_KERNEL);
if (!iospace) {
printk(KERN_ERR "PCI: No memory for %s I/O port space\n",
info->name);
goto out;
}
len = strlen(info->name) + 32;
name = kzalloc(len, GFP_KERNEL);
if (!name) {
printk(KERN_ERR "PCI: No memory for %s I/O port space name\n",
info->name);
goto free_resource;
}
name = (char *)(iospace + 1);
min = addr->minimum;
max = min + addr->address_length - 1;
@ -198,7 +195,7 @@ static u64 add_io_space(struct pci_root_info *info,
space_nr = new_space(addr->translation_offset, sparse);
if (space_nr == ~0)
goto free_name;
goto free_resource;
base = __pa(io_space[space_nr].mmio_base);
base_port = IO_SPACE_BASE(space_nr);
@ -213,18 +210,23 @@ static u64 add_io_space(struct pci_root_info *info,
if (space_nr == 0)
sparse = 1;
resource = &iospace->res;
resource->name = name;
resource->flags = IORESOURCE_MEM;
resource->start = base + (sparse ? IO_SPACE_SPARSE_ENCODING(min) : min);
resource->end = base + (sparse ? IO_SPACE_SPARSE_ENCODING(max) : max);
insert_resource(&iomem_resource, resource);
if (insert_resource(&iomem_resource, resource)) {
dev_err(&info->bridge->dev,
"can't allocate host bridge io space resource %pR\n",
resource);
goto free_resource;
}
list_add_tail(&iospace->list, &info->io_resources);
return base_port;
free_name:
kfree(name);
free_resource:
kfree(resource);
kfree(iospace);
out:
return ~0;
}
@ -325,6 +327,48 @@ static acpi_status add_window(struct acpi_resource *res, void *data)
return AE_OK;
}
static void free_pci_root_info_res(struct pci_root_info *info)
{
struct iospace_resource *iospace, *tmp;
list_for_each_entry_safe(iospace, tmp, &info->io_resources, list)
kfree(iospace);
kfree(info->name);
kfree(info->res);
info->res = NULL;
kfree(info->res_offset);
info->res_offset = NULL;
info->res_num = 0;
kfree(info->controller);
info->controller = NULL;
}
static void __release_pci_root_info(struct pci_root_info *info)
{
int i;
struct resource *res;
struct iospace_resource *iospace;
list_for_each_entry(iospace, &info->io_resources, list)
release_resource(&iospace->res);
for (i = 0; i < info->res_num; i++) {
res = &info->res[i];
if (!res->parent)
continue;
if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
continue;
release_resource(res);
}
free_pci_root_info_res(info);
kfree(info);
}
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
@ -357,6 +401,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
goto out2;
}
INIT_LIST_HEAD(&info->io_resources);
INIT_LIST_HEAD(&info->resources);
/* insert busn resource at first */
pci_add_resource(&info->resources, &root->secondary);
@ -397,6 +442,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
&info->resources);
if (!pbus) {
pci_free_resource_list(&info->resources);
__release_pci_root_info(info);
return NULL;
}