Change in flashrom[master]: pony_spi.c: Extract out get_params to simplify init

[Edward O'Callaghan (Code Review)]

Edward O'Callaghan has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/63130 )

Change subject: pony_spi.c: Extract out get_params to simplify init
......................................................................

pony_spi.c: Extract out get_params to simplify init

In light of `commit caa0335114a81`, extract out the get_param
logic to its own function to simplify the number of cleanup
paths.

BUG=none
TEST=builds

Change-Id: I364febc05c870683cbad114583762b0c006f4bac
Signed-off-by: Edward O'Callaghan 
---
M pony_spi.c
1 file changed, 48 insertions(+), 40 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/30/63130/1

diff --git a/pony_spi.c b/pony_spi.c
index a3ac274..2285c64 100644
--- a/pony_spi.c
+++ b/pony_spi.c
@@ -120,13 +120,51 @@
    return ret;
 }

+static int get_params(enum pony_type *type, bool *have_device)
+{
+	char *arg = NULL;
+	int ret = 0;
+
+	/* defaults */
+	*type = TYPE_SI_PROG;
+	*have_device = false;
+
+	/* The parameter is in format "dev=/dev/device,type=serbang" */
+	arg = extract_programmer_param("dev");
+	if (arg && strlen(arg)) {
+		sp_fd = sp_openserport(arg, 9600);
+		if (sp_fd == SER_INV_FD)
+			ret = 1;
+		else
+			*have_device = true;
+	}
+	free(arg);
+
+	arg = extract_programmer_param("type");
+	if (arg && !strcasecmp(arg, "serbang")) {
+		*type = TYPE_SERBANG;
+	} else if (arg && !strcasecmp(arg, "si_prog")) {
+		*type = TYPE_SI_PROG;
+	} else if (arg && !strcasecmp( arg, "ajawe")) {
+		*type = TYPE_AJAWE;
+	} else if (arg && !strlen(arg)) {
+		msg_perr("Error: Missing argument for programmer type.\n");
+		ret = 1;
+	} else if (arg){
+		msg_perr("Error: Invalid programmer type specified.\n");
+		ret = 1;
+	}
+	free(arg);
+
+	return ret;
+}
+
 static int pony_spi_init(void)
 {
    int i, data_out;
-	char *arg = NULL;
-	enum pony_type type = TYPE_SI_PROG;
+	enum pony_type type;
    const char *name;
-	int have_device = 0;
+	bool have_device;
    int have_prog = 0;

struct pony_spi_data *data = calloc(1, sizeof(*data));
@@ -139,49 +177,19 @@
    data->negate_mosi = 0;
    data->negate_miso = 0;

-	/* The parameter is in format "dev=/dev/device,type=serbang" */
-	arg = extract_programmer_param("dev");
-	if (arg && strlen(arg)) {
-		sp_fd = sp_openserport(arg, 9600);
-		if (sp_fd == SER_INV_FD) {
-			free(arg);
-			free(data);
-			return 1;
-		}
-		if (register_shutdown(pony_spi_shutdown, data) != 0) {
-			free(arg);
-			free(data);
-			serialport_shutdown(NULL);
-			return 1;
-		}
-		have_device++;
-	}
-	free(arg);
-
+	get_params(&type, &have_device);
    if (!have_device) {
    	msg_perr("Error: No valid device specified.\n"
    		 "Use flashrom -p pony_spi:dev=/dev/device[,type=name]\n");
-		free(data);
    	return 1;
    }

-	arg = extract_programmer_param("type");
-	if (arg && !strcasecmp(arg, "serbang")) {
-		type = TYPE_SERBANG;
-	} else if (arg && !strcasecmp(arg, "si_prog")) {
-		type = TYPE_SI_PROG;
-	} else if (arg && !strcasecmp( arg, "ajawe")) {
-		type = TYPE_AJAWE;
-	} else if (arg && !strlen(arg)) {
-		msg_perr("Error: Missing argument for programmer type.\n");
-		free(arg);
-		return 1;
-	} else if (arg){
-		msg_perr("Error: Invalid programmer type specified.\n");
-		free(arg);
+
+	if (register_shutdown(pony_spi_shutdown, data) != 0) {
+		free(data);
+		serialport_shutdown(NULL);
    	return 1;
    }
-	free(arg);

/*
     * Configure the serial port pins, depending on the used programmer.
@@ -221,12 +229,12 @@

switch (type) {
    case TYPE_AJAWE:
-		have_prog = 1;
+		have_prog = true;
    	break;
    case TYPE_SI_PROG:
    case TYPE_SERBANG:
    default:
-		have_prog = 1;
+		have_prog = true;
    	/* We toggle RTS/SCK a few times and see if DSR changes too. */
    	for (i = 1; i <= 10; i++) {
    		data_out = i & 1;