mec1308.c: Extract params check into a function

This allows char *p to become a local variable in check_params,
and it is allocated and freed within check_params function.
Which means init function does not need char *p anymore,
in particular does not need to free it - and this makes cleanup
after failed init easier.

As a good side effect, init function becomes easier to read.

TEST=builds and ninja test from 51487
BUG=b:185191942

Change-Id: If5be7709e93233a2e7ea9133de50382d2524a55f
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/52595
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>

1 files changed, 16 insertions, 5 deletions

diff --git a/mec1308.c b/mec1308.c
index c4b34f571..682e7a96e 100644
--- a/mec1308.c
+++ b/mec1308.c
@@ -406,13 +406,27 @@ static struct spi_master spi_master_mec1308 = {
 	.write_256 = default_spi_write_256,
 };
 
+static int check_params(void)
+{
+	int ret = 0;
+	char *p = NULL;
+
+	p = extract_programmer_param("type");
+	if (p && strcmp(p, "ec")) {
+		msg_pdbg("mec1308 only supports \"ec\" type devices\n");
+		ret = 1;
+	}
+
+	free(p);
+	return ret;
+}
+
 int mec1308_init(void)
 {
 	uint16_t sio_port;
 	uint8_t device_id;
 	uint8_t tmp8;
 	int ret = 0;
-	char *p = NULL;
 	mec1308_data_t *ctx_data = NULL;
 
 	msg_pdbg("%s(): entered\n", __func__);
@@ -423,9 +437,7 @@ int mec1308_init(void)
 		return 1;
 	}
 
-	p = extract_programmer_param("type");
-	if (p && strcmp(p, "ec")) {
-		msg_pdbg("mec1308 only supports \"ec\" type devices\n");
+	if (check_params()) {
 		ret = 1;
 		goto mec1308_init_exit;
 	}
@@ -515,7 +527,6 @@ int mec1308_init(void)
 	msg_pdbg("%s(): successfully initialized mec1308\n", __func__);
 
 mec1308_init_exit:
-	free(p);
 	if (ret)
 		free(ctx_data);
 	return ret;