[qemu-s390x] [PATCH v3 21/25] s390x/sclp: Use size_t in process_mdb()

[Philippe Mathieu-Daudé]

Since it is unlikely we have sizeof(mdbo->mto.message) < 0,
we can convert this variable to an unsigned type.

Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
 hw/char/sclpconsole-lm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/char/sclpconsole-lm.c b/hw/char/sclpconsole-lm.c
index 49543e2c83..48c76d863e 100644
--- a/hw/char/sclpconsole-lm.c
+++ b/hw/char/sclpconsole-lm.c
@@ -208,7 +208,7 @@ static int write_console_data(SCLPEvent *event, const 
uint8_t *buf, int len)
 static int process_mdb(SCLPEvent *event, MDBO *mdbo)
 {
     int rc;
-    int len;
+    uint16_t len;
     uint8_t buffer[SIZE_BUFFER];
     const size_t hlen = sizeof(mdbo->length)
             + sizeof(mdbo->type)
@@ -217,6 +217,7 @@ static int process_mdb(SCLPEvent *event, MDBO *mdbo)
             + sizeof(mdbo->mto._reserved);
 
     len = be16_to_cpu(mdbo->length);
+    assert(len >= hlen);
     len -= hlen;
     assert(len <= SIZE_BUFFER);
 
-- 
2.20.1