[OpenWrt-Devel] [PATCH] libfstools: Output error in case of loop blkdev failure

[Petr Štetiar]

It took me quite some time today(while fixing squashfs+overlay on
armvirt) to find out, that I was missing support for loop block device
in kernel, so I'm adding error message which might be helpful for
someone else in the future as well.

Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 libfstools/rootdisk.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libfstools/rootdisk.c b/libfstools/rootdisk.c
index dd00c1b..68a6296 100644
--- a/libfstools/rootdisk.c
+++ b/libfstools/rootdisk.c
@@ -258,8 +258,10 @@ static int rootdisk_volume_init(struct volume *v)
 	char str[128];
 	int ret = 0;
 
-	if (!p->loop_name[0] && rootdisk_create_loop(p) != 0)
+	if (!p->loop_name[0] && rootdisk_create_loop(p) != 0) {
+		ULOG_ERR("unable to create loop device\n");
 		return -1;
+	}
 
 	v->type = BLOCKDEV;
 	v->blk = p->loop_name;
-- 
1.9.1


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