[PATCH] mkfs: fix mkfs when blkid fails

[Eric Sandeen <sandeen@xxxxxxxxxxx>]

When trying to mkfs something that blkid doesn't grok:

# mkfs.xfs fsfile 
warning: unable to probe device toplology for device fsfile
illegal sector size 0
Usage: mkfs.xfs
...

mkfs fails.  :(

Brown-paper-bag: Eric Sandeen <sandeen@xxxxxxxxxxx>
Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxxx>
---


diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index 9a8eff3..faaafed 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -1574,7 +1574,7 @@ main(
                 * Unless specified manually on the command line use the
                 * advertised sector size of the device.
                 */
-               sectorsize = ft.sectorsize;
+               sectorsize = ft.sectorsize ? ft.sectorsize : XFS_MIN_SECTORSIZE;
        }
 
        if (ft.sectoralign || !ssflag) {