Re: [RFC] possible fix for broken floppy driver since 2.5.13

[Christoph Hellwig]

On Mon, May 20, 2002 at 07:01:52PM +0200, Mikael Pettersson wrote:
> Since 2.5.13 I've been unable to use drivers/block/floppy.c.
> There were two symptoms: /dev/fd0 was read-only until after
> the first read, and writes wrote currupt data to the media.
> 
> The patch below against 2.5.16 fixes these problems for me:
> 
> - The read-only problem was caused by a getblk() call in
>   floppy_revalidate() which had been commented out (2.5.13
>   did away with getblk() altogether.) This call is necessary,
>   so the patch reintroduces a private getblk() in floppy.c.

Please don't use getblk(), but go directly through the bio interface.
In 2.5 the buffer_heads are just a legacy interface for filesystems and
are not supposed to be used by lowlevel drivers.