The ACPI table buffer should be put to release the table
mapping.
Signed-off-by: Hanjun Guo <guohanjun@xxxxxxxxxx>
---
drivers/char/tpm/tpm_tis.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index e7df342..59b25c1 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -102,6 +102,7 @@ static int check_acpi_tpm2(struct device *dev)
const struct acpi_device_id *aid = acpi_match_device(tpm_acpi_tbl, dev);
struct acpi_table_tpm2 *tbl;
acpi_status st;
+ int ret = 0;
if (!aid || aid->driver_data != DEVICE_IS_TPM2)
return 0;
@@ -109,8 +110,7 @@ static int check_acpi_tpm2(struct device *dev)
/* If the ACPI TPM2 signature is matched then a global ACPI_SIG_TPM2
* table is mandatory
*/
- st =
- acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl);
+ st = acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl);
if (ACPI_FAILURE(st) || tbl->header.length < sizeof(*tbl)) {
dev_err(dev, FW_BUG "failed to get TPM2 ACPI table\n");
return -EINVAL;
@@ -118,9 +118,10 @@ static int check_acpi_tpm2(struct device *dev)
/* The tpm2_crb driver handles this device */
if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED)
- return -ENODEV;
+ ret = -ENODEV;
- return 0;
+ acpi_put_table((struct acpi_table_header *)tbl);
+ return ret;
}
#else
static int check_acpi_tpm2(struct device *dev)
--
1.7.12.4
