tpm_tis: check pnp_acpi_device return code

Reported-by: Peter Hüwe <peterhuewe@gmx.de> Reviewed-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
git-mirror · Feb 5, 2013 · 6e38bfa · 6e38bfa
1 parent 7333549
commit 6e38bfa
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
@@ -84,6 +84,9 @@ static int is_itpm(struct pnp_dev *dev)
 	struct acpi_device *acpi = pnp_acpi_device(dev);
 	struct acpi_hardware_id *id;
 
+	if (!acpi)
+		return 0;
+
 	list_for_each_entry(id, &acpi->pnp.ids, list) {
 		if (!strcmp("INTC0102", id->id))
 			return 1;