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-rw-r--r--src/ec/google/chromeec/ec.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/ec/google/chromeec/ec.c b/src/ec/google/chromeec/ec.c
index 9e6e4d6691..7d35a046b5 100644
--- a/src/ec/google/chromeec/ec.c
+++ b/src/ec/google/chromeec/ec.c
@@ -194,7 +194,7 @@ int google_chromeec_vbnv_context(int is_read, uint8_t *data, int len)
cec_cmd.cmd_data_in = &cmd_vbnvcontext;
cec_cmd.cmd_data_out = &rsp_vbnvcontext;
cec_cmd.cmd_size_in = sizeof(cmd_vbnvcontext);
- cec_cmd.cmd_size_out = sizeof(rsp_vbnvcontext);
+ cec_cmd.cmd_size_out = is_read ? sizeof(rsp_vbnvcontext) : 0;
cmd_vbnvcontext.op = is_read ? EC_VBNV_CONTEXT_OP_READ :
EC_VBNV_CONTEXT_OP_WRITE;