commit e43cd62994b99a15aba72212e509ef5ed002f70d
author Christophe Ricard <christophe.ricard@gmail.com> Thu Jan 21 23:19:13 2016 +0100
committer Simon Glass <sjg@chromium.org> Thu Jan 28 21:01:22 2016 -0700
tree a956c2811e69307134194cb04da0d074d8fcea2a
parent 52a528294992ca305883adb593b048475b0ed494

tpm: Fix fault in case CONFIG_DM_TPM is set without any TPM

In case CONFIG_DM_TPM was set without any TPM chipset configured a fault
was generated (NULL pointer access).

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>

cmd/tpm.c

diff --git a/cmd/tpm.c b/cmd/tpm.c
index add6bfb..6edf3e9 100644
--- a/cmd/tpm.c
+++ b/cmd/tpm.c
@@ -448,7 +448,7 @@
 	int rc;
 
 	rc = uclass_first_device(UCLASS_TPM, devp);
-	if (rc) {
+	if (rc || !*devp) {
 		printf("Could not find TPM (ret=%d)\n", rc);
 		return CMD_RET_FAILURE;
 	}