ntfs: Check for disk read error during FS probing

If reading the NTFS BIOS parameter block fails for any reason,
we will not attempt to continue to work towards finding an
NTFS filesystem on the disk/partition.

Signed-off-by: Shao Miller <shao.miller@yrdsb.edu.on.ca>
Signed-off-by: Paulo Alcantara <pcacjr@gmail.com>

diff --git a/core/fs/ntfs/ntfs.c b/core/fs/ntfs/ntfs.c
index 86d2e40..03dec41 100644 (file)
--- a/core/fs/ntfs/ntfs.c
+++ b/core/fs/ntfs/ntfs.c
@@ -1125,12 +1125,15 @@ err_mrec:
 /* Initialize the filesystem metadata and return blk size in bits */
 static int ntfs_fs_init(struct fs_info *fs)
 {
+    int read_count;
     struct ntfs_bpb ntfs;
     struct ntfs_sb_info *sbi;
     struct disk *disk = fs->fs_dev->disk;
     uint8_t mft_record_shift;
 
-    disk->rdwr_sectors(disk, &ntfs, 0, 1, 0);
+    read_count = disk->rdwr_sectors(disk, &ntfs, 0, 1, 0);
+    if (!read_count)
+       return -1;
 
     /* sanity check */
     if (!ntfs_check_sb_fields(&ntfs))