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ACPI / TPM: fix memory leak when walking ACPI namespace

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In function ppi_callback(), memory allocated by acpi_get_name() will get
leaked when current device isn't the desired TPM device, so fix the
memory leak.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jiang Liu 2013-12-19 20:38:15 +08:00 committed by Rafael J. Wysocki
parent d6e0a2dd12
commit df45c712d1
1 changed files with 9 additions and 6 deletions
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15
drivers/char/tpm/tpm_ppi.c
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@ -27,15 +27,18 @@ static char *tpm_device_name = "TPM";
static acpi_status ppi_callback(acpi_handle handle, u32 level, void *context,
void **return_value)
{
acpi_status status;
acpi_status status = AE_OK;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
if (strstr(buffer.pointer, context) != NULL) {
*return_value = handle;
if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) {
if (strstr(buffer.pointer, context) != NULL) {
*return_value = handle;
status = AE_CTRL_TERMINATE;
}
kfree(buffer.pointer);
return AE_CTRL_TERMINATE;
}
return AE_OK;
return status;
}
static inline void ppi_assign_params(union acpi_object params[4],