modbus_read_input_registers: also guard debug output by context debug…

… flag Signed-off-by: Michael Heimpold <mhei@heimpold.de>
stephane · Dec 4, 2022 · 0c4b419 · 0c4b419
1 parent fa18d04
commit 0c4b419
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/src/modbus.c b/src/modbus.c
@@ -1343,10 +1343,12 @@ int modbus_read_input_registers(modbus_t *ctx, int addr, int nb, uint16_t *dest)
     }
 
     if (nb > MODBUS_MAX_READ_REGISTERS) {
-        fprintf(stderr,
-                "ERROR Too many input registers requested (%d > %d)\n",
-                nb,
-                MODBUS_MAX_READ_REGISTERS);
+        if (ctx->debug) {
+            fprintf(stderr,
+                    "ERROR Too many input registers requested (%d > %d)\n",
+                    nb,
+                    MODBUS_MAX_READ_REGISTERS);
+        }
         errno = EMBMDATA;
         return -1;
     }