From: schspa <schspa@gmail.com>
Date: Wed, 20 Oct 2021 12:15:55 +0000 (+0800)
Subject: part: return -ENOSYS when get_info not valid.
X-Git-Url: http://git.dujemihanovic.xyz/img/sics.gif?a=commitdiff_plain;h=50f7b2effd4971439e9b66467e4abf6688a124d9;p=u-boot.git

part: return -ENOSYS when get_info not valid.

In some case, get_info() interface can be NULL, add this check to stop
from crash.

Signed-off-by: schspa <schspa@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---

diff --git a/disk/part.c b/disk/part.c
index a6a8f7052b..fe1ebd4adf 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -668,6 +668,13 @@ int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
 	part_drv = part_driver_lookup_type(dev_desc);
 	if (!part_drv)
 		return -1;
+
+	if (!part_drv->get_info) {
+		log_debug("## Driver %s does not have the get_info() method\n",
+			  part_drv->name);
+		return -ENOSYS;
+	}
+
 	for (i = 1; i < part_drv->max_entries; i++) {
 		ret = part_drv->get_info(dev_desc, i, info);
 		if (ret != 0) {