Use new SP_ERR_SUPP error to indicate unsupported operations.

[libserialport.git] / serialport.c

diff --git a/serialport.c b/serialport.c
index 0f1b5a58409567fa3e8a91db8cedbf127919954a..007de4372c4134edf4d821a9a033ab430781a85a 100644 (file)
--- a/serialport.c
+++ b/serialport.c
@@ -1055,7 +1055,7 @@ static enum sp_return set_config(struct sp_port *port, struct port_data *data,
 #elif defined(__linux__)
                        baud_nonstd = 1;
 #else
-                       return SP_ERR_ARG;
+                       return SP_ERR_SUPP;
 #endif
                }
        }
@@ -1141,17 +1141,17 @@ static enum sp_return set_config(struct sp_port *port, struct port_data *data,
                                /* Flow control can only be disabled for both RTS & CTS together. */
                                if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
                                        if (config->cts != SP_CTS_IGNORE)
-                                               return SP_ERR_ARG;
+                                               return SP_ERR_SUPP;
                                }
                                if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
                                        if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
-                                               return SP_ERR_ARG;
+                                               return SP_ERR_SUPP;
                                }
                        } else {
                                /* Flow control can only be enabled for both RTS & CTS together. */
                                if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
                                        ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
-                                       return SP_ERR_ARG;
+                                       return SP_ERR_SUPP;
                        }
 
                        if (config->rts >= 0) {
@@ -1188,7 +1188,7 @@ static enum sp_return set_config(struct sp_port *port, struct port_data *data,
                } else {
                        /* DTR/DSR flow control not supported. */
                        if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
-                               return SP_ERR_ARG;
+                               return SP_ERR_SUPP;
 
                        if (config->dtr >= 0) {
                                controlbits = TIOCM_DTR;