mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-27 11:19:37 +00:00
Code Issues Releases Wiki Activity

[PATCH] acpiphp: fix acpi_path_name

Browse source 
I encountered the problem that the insmod of the acpiphp
fails because of the mis-freeing of the memory.

I tested this patch on my tiger4 box.

Signed-off-by: MUNEDA Takahiro <muneda.takahiro@jp.fujitsu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
MUNEDA Takahiro 2006-03-17 09:18:39 +09:00 committed by Greg Kroah-Hartman
parent dc6712d126
commit b2e6e3ba7d
3 changed files with 27 additions and 43 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

54
drivers/pci/hotplug/acpi_pcihp.c
View file

@ -37,28 +37,6 @@
#define METHOD_NAME__HPP "_HPP"
#define METHOD_NAME_OSHP "OSHP"
/* acpi_path_name
*
* @handle - the acpi_handle of the object who's name you want.
*
* Caller must free buffer.
*/
u8 * acpi_path_name(acpi_handle handle)
{
acpi_status status;
struct acpi_buffer ret_buf = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object *obj;
status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &ret_buf);
if (ACPI_FAILURE(status)) {
return NULL;
}
obj = ret_buf.pointer;
return obj->string.pointer;
}
EXPORT_SYMBOL_GPL(acpi_path_name);
static acpi_status
acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
@ -66,10 +44,12 @@ acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
acpi_status status;
u8 nui[4];
struct acpi_buffer ret_buf = { 0, NULL};
struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *ext_obj, *package;
u8 *path_name = acpi_path_name(handle);
int i, len = 0;
acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
/* get _hpp */
status = acpi_evaluate_object(handle, METHOD_NAME__HPP, NULL, &ret_buf);
switch (status) {
@ -77,8 +57,8 @@ acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
ret_buf.pointer = kmalloc (ret_buf.length, GFP_KERNEL);
if (!ret_buf.pointer) {
printk(KERN_ERR "%s:%s alloc for _HPP fail\n",
__FUNCTION__, path_name);
acpi_os_free(path_name);
__FUNCTION__, (char *)string.pointer);
acpi_os_free(string.pointer);
return AE_NO_MEMORY;
}
status = acpi_evaluate_object(handle, METHOD_NAME__HPP,
@ -88,8 +68,8 @@ acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
default:
if (ACPI_FAILURE(status)) {
pr_debug("%s:%s _HPP fail=0x%x\n", __FUNCTION__,
path_name, status);
acpi_os_free(path_name);
(char *)string.pointer, status);
acpi_os_free(string.pointer);
return status;
}
}
@ -97,7 +77,7 @@ acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
ext_obj = (union acpi_object *) ret_buf.pointer;
if (ext_obj->type != ACPI_TYPE_PACKAGE) {
printk(KERN_ERR "%s:%s _HPP obj not a package\n", __FUNCTION__,
path_name);
(char *)string.pointer);
status = AE_ERROR;
goto free_and_return;
}
@ -112,7 +92,7 @@ acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
break;
default:
printk(KERN_ERR "%s:%s _HPP obj type incorrect\n",
__FUNCTION__, path_name);
__FUNCTION__, (char *)string.pointer);
status = AE_ERROR;
goto free_and_return;
}
@ -129,8 +109,8 @@ acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
pr_debug(" _HPP: enable PERR =0x%x\n", hpp->enable_perr);
free_and_return:
acpi_os_free(path_name);
kfree(ret_buf.pointer);
acpi_os_free(string.pointer);
acpi_os_free(ret_buf.pointer);
return status;
}
@ -143,16 +123,20 @@ acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
acpi_status acpi_run_oshp(acpi_handle handle)
{
acpi_status status;
u8 *path_name = acpi_path_name(handle);
struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
/* run OSHP */
status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL);
if (ACPI_FAILURE(status))
printk(KERN_ERR "%s:%s OSHP fails=0x%x\n", __FUNCTION__,
path_name, status);
(char *)string.pointer, status);
else
pr_debug("%s:%s OSHP passes\n", __FUNCTION__, path_name);
acpi_os_free(path_name);
pr_debug("%s:%s OSHP passes\n", __FUNCTION__,
(char *)string.pointer);
acpi_os_free(string.pointer);
return status;
}
EXPORT_SYMBOL_GPL(acpi_run_oshp);

1
drivers/pci/hotplug/pci_hotplug.h
View file

@ -190,7 +190,6 @@ struct hotplug_params {
extern acpi_status acpi_run_oshp(acpi_handle handle);
extern acpi_status acpi_get_hp_params_from_firmware(struct pci_dev *dev,
struct hotplug_params *hpp);
extern u8 * acpi_path_name(acpi_handle handle);
int acpi_root_bridge(acpi_handle handle);
#endif
#endif

15
drivers/pci/hotplug/pciehp_hpc.c
View file

@ -1246,7 +1246,7 @@ int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
acpi_handle chandle, handle = DEVICE_ACPI_HANDLE(&(dev->dev));
struct pci_dev *pdev = dev;
struct pci_bus *parent;
u8 *path_name = NULL;
struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
/*
* Per PCI firmware specification, we should run the ACPI _OSC
@ -1278,16 +1278,17 @@ int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
}
while (handle) {
path_name = acpi_path_name(handle);
dbg("Trying to get hotplug control for %s \n", path_name);
acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
dbg("Trying to get hotplug control for %s \n",
(char *)string.pointer);
status = pci_osc_control_set(handle,
OSC_PCI_EXPRESS_NATIVE_HP_CONTROL);
if (status == AE_NOT_FOUND)
status = acpi_run_oshp(handle);
if (ACPI_SUCCESS(status)) {
dbg("Gained control for hotplug HW for pci %s (%s)\n",
pci_name(dev), path_name);
acpi_os_free(path_name);
pci_name(dev), (char *)string.pointer);
acpi_os_free(string.pointer);
return 0;
}
if (acpi_root_bridge(handle))
@ -1300,8 +1301,8 @@ int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
err("Cannot get control of hotplug hardware for pci %s\n",
pci_name(dev));
if (path_name)
acpi_os_free(path_name);
acpi_os_free(string.pointer);
return -1;
}
#endif