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[PATCH] drivers/block/loop.c: don't return garbage if LOOP_SET_STATUS not called 

While writing a version of losetup, I ran into the problem that the loop
device was returning total garbage.

It turns out the problem was that this losetup was only issuing the
LOOP_SET_FD ioctl and not issuing a subsequent LOOP_SET_STATUS ioctl.  This
losetup didn't have any special status to set, so it left out the call.

The deeper cause is that loop_set_fd sets the transfer function to NULL,
which causes no transfer to happen lo_do_transfer.

This patch fixes the problem by setting transfer to transfer_none in
loop_set_fd.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Constantine Sapuntzakis 2006-06-23 02:06:08 -07:00 committed by Linus Torvalds
parent 98bd34eaf1
commit eefe85ee35
1 changed files with 1 additions and 1 deletions
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2
drivers/block/loop.c
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@ -818,7 +818,7 @@ static int loop_set_fd(struct loop_device *lo, struct file *lo_file,
lo->lo_device = bdev;
lo->lo_flags = lo_flags;
lo->lo_backing_file = file;
lo->transfer = NULL;
lo->transfer = transfer_none;
lo->ioctl = NULL;
lo->lo_sizelimit = 0;
lo->old_gfp_mask = mapping_gfp_mask(mapping);