[RFC PATCH 1/2] env: sf: add missing spi_flash_free

[Patrick Delaunay <patrick.delaunay@foss.st.com>]

Free the SPI resources by calling spi_flash_free() in each env sf
function to avoid issue for other SPI users.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
---

 env/sf.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/env/sf.c b/env/sf.c
index 6b61a4b8de..acbd712aef 100644
--- a/env/sf.c
+++ b/env/sf.c
@@ -149,6 +149,9 @@ static int env_sf_save(void)
 	printf("Valid environment: %d\n", (int)gd->env_valid);
 
 done:
+	spi_flash_free(env_flash);
+	env_flash = NULL;
+
 	if (saved_buffer)
 		free(saved_buffer);
 
@@ -246,6 +249,9 @@ static int env_sf_save(void)
 	puts("done\n");
 
 done:
+	spi_flash_free(env_flash);
+	env_flash = NULL;
+
 	if (saved_buffer)
 		free(saved_buffer);
 
@@ -404,6 +410,9 @@ static int env_sf_init_early(void)
 		gd->env_addr = (unsigned long)&tmp_env1->data;
 	}
 
+	spi_flash_free(env_flash);
+	env_flash = NULL;
+
 	return 0;
 err_read:
 	spi_flash_free(env_flash);
-- 
2.17.1