ROMFS: Advance destination buffer pointer when reading from a blockdev

RomFS should advance the destination buffer pointer when reading data from a
blockdev source (the data may be split over multiple blocks, each requiring its
own sb_read() call).  Without this, all the data is copied to the beginning of
the output buffer.

Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/romfs/storage.c b/fs/romfs/storage.c
index 66ce9ddfe504..b3208adf8e71 100644
--- a/fs/romfs/storage.c
+++ b/fs/romfs/storage.c
@@ -120,6 +120,7 @@ static int romfs_blk_read(struct super_block *sb, unsigned long pos,
                         return -EIO;
                 memcpy(buf, bh->b_data + offset, segment);
                 brelse(bh);
+                buf += segment;
                 buflen -= segment;
                 pos += segment;
         }