From 4396649fe040334c61543856624fb8f75bec4b86 Mon Sep 17 00:00:00 2001
From: Stéphane Raimbault <stephane.raimbault@gmail.com>
Date: Sun, 17 Jun 2012 15:37:35 +0200
Subject: [PATCH] Remove useless test on error_recovery argument

---
 src/modbus.c |  9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/src/modbus.c b/src/modbus.c
index b433b84..b555913 100644
--- a/src/modbus.c
+++ b/src/modbus.c
@@ -1402,13 +1402,8 @@ int modbus_set_slave(modbus_t *ctx, int slave)
 int modbus_set_error_recovery(modbus_t *ctx,
                               modbus_error_recovery_mode error_recovery)
 {
-    if (error_recovery >= 0) {
-        ctx->error_recovery = (uint8_t) error_recovery;
-    } else {
-        errno = EINVAL;
-        return -1;
-    }
-
+    /* The type of modbus_error_recovery_mode is unsigned enum */
+    ctx->error_recovery = (uint8_t) error_recovery;
     return 0;
 }
 
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