spl: change return values of spl_*_load_image()

Make spl_*_load_image() functions return a value instead of
hanging if a problem is encountered. This enables main spl code
to make the decision whether to hang or not, thus preparing
it to support alternative boot devices.

Some boot devices (namely nand and spi) do not hang on error.
Instead, they return normally and SPL proceeds to boot the
contents of the load address. This is considered a bug and
is rectified by hanging on error for these devices as well.

Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Ian Campbell <ijc@hellion.org.uk>
Cc: Hans De Goede <hdegoede@redhat.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Jagan Teki <jteki@openedev.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/common/spl/spl_sata.c b/common/spl/spl_sata.c
index 2a5eb29857..3ba4c249b7 100644
--- a/common/spl/spl_sata.c
+++ b/common/spl/spl_sata.c
@@ -14,12 +14,13 @@
 #include <asm/u-boot.h>
 #include <sata.h>
 #include <scsi.h>
+#include <errno.h>
 #include <fat.h>
 #include <image.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
-void spl_sata_load_image(void)
+int spl_sata_load_image(void)
 {
 	int err;
 	block_dev_desc_t *stor_dev;
@@ -29,11 +30,13 @@ void spl_sata_load_image(void)
 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 		printf("spl: sata init failed: err - %d\n", err);
 #endif
-		hang();
+		return err;
 	} else {
 		/* try to recognize storage devices immediately */
 		scsi_scan(0);
 		stor_dev = scsi_get_dev(0);
+		if (!stor_dev)
+			return -ENODEV;
 	}
 
 #ifdef CONFIG_SPL_OS_BOOT
@@ -45,6 +48,8 @@ void spl_sata_load_image(void)
 				CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
 	if (err) {
 		puts("Error loading sata device\n");
-		hang();
+		return err;
 	}
+
+	return 0;
 }