[patch] ipmi_ssif: silence an uninitialized variable warning

[Dan Carpenter]

My static checker complains that "ret" could be zero here.  (Presumably
that means the hardware is badly busted).  But the result would be that
the caller assumes *resp_len is initialized when it's not and it leads
to a warning.  Let's just silence the warning.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
index 8b3be8b..512c5b6 100644
--- a/drivers/char/ipmi/ipmi_ssif.c
+++ b/drivers/char/ipmi/ipmi_ssif.c
@@ -1232,6 +1232,8 @@ static int do_cmd(struct i2c_client *client, int len, unsigned char *msg,
 			break;
 	}
 
+	if (ret == 0)
+		ret = -EINVAL;
 	if (ret > 0) {
 		/* Validate that the response is correct. */
 		if (ret < 3 ||