ubimkvol: check for free LEBs

Check for free LEBs before trying to create a volume. This fixes
the following issue:

$ ubimkvol /dev/ubi0 -n 0 -N test_fs -m
ubimkvol: error!: cannot UBI create volume
          error 22 (Invalid argument)
Error: cannot create UBI volume

"Invalid argument" ? Not understandable. But the thing is that
-m makes ubimkvol use available space, which is zero, then it
passes zero to the ioctl, which fails in request validation
code, because 0 invalid volume size.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/ubi-utils/new-utils/src/ubimkvol.c b/ubi-utils/new-utils/src/ubimkvol.c
index fd8c568..ad072c4 100644
--- a/ubi-utils/new-utils/src/ubimkvol.c
+++ b/ubi-utils/new-utils/src/ubimkvol.c
@@ -261,6 +261,11 @@ int main(int argc, char * const argv[])
 		goto out_libubi;
 	}
 
+	if (dev_info.avail_bytes == 0) {
+		errmsg("UBI device does not have free logical eraseblocks");
+		goto out_libubi;
+	}
+
 	if (args.maxavs) {
 		args.bytes = dev_info.avail_bytes;
 		printf("Set volume size to %lld\n", args.bytes);