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[PATCH] acpiphp: fix acpi_path_name

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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
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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 @@ free_and_return:
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);