ene_lpc.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.

BUG=b:185191942
TEST=builds

Change-Id: I7c3b6dea0edbc7547f0b307a0508c7d2b2a6d370
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/52684
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, 14 insertions, 5 deletions

diff --git a/ene_lpc.c b/ene_lpc.c
index 1d045b841..c05fef83f 100644
--- a/ene_lpc.c
+++ b/ene_lpc.c
@@ -513,11 +513,23 @@ static struct spi_master spi_master_ene = {
 	.write_256 = default_spi_write_256,
 };
 
+static int check_params(void)
+{
+	int ret = 0;
+	char *const p = extract_programmer_param("type");
+	if (p && strcmp(p, "ec")) {
+		msg_pdbg("ene_lpc only supports \"ec\" type devices\n");
+		ret = 1;
+	}
+
+	free(p);
+	return ret;
+}
+
 int ene_lpc_init()
 {
 	uint8_t hwver, ediid, i;
 	int ret = 0;
-	char *p = NULL;
 	ene_lpc_data_t *ctx_data = NULL;
 
 	msg_pdbg("%s\n", __func__);
@@ -529,9 +541,7 @@ int ene_lpc_init()
 	}
 	ctx_data->ec_state = EC_STATE_NORMAL;
 
-	p = extract_programmer_param("type");
-	if (p && strcmp(p, "ec")) {
-		msg_pdbg("ene_lpc only supports \"ec\" type devices\n");
+	if (check_params()) {
 		ret = 1;
 		goto ene_probe_spi_flash_exit;
 	}
@@ -572,7 +582,6 @@ int ene_lpc_init()
 	msg_pdbg("%s: successfully initialized ene\n", __func__);
 
 ene_probe_spi_flash_exit:
-	free(p);
 	if (ret)
 		free(ctx_data);
 	return ret;