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SubjectRe: [RFC] possible fix for broken floppy driver since 2.5.13
Christoph Hellwig writes:
> 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.

I haven't got a clue on how to program Linux' block I/O interfaces.
Show me how to do a modern equivalent of getblk(dev,0,1024) + waiting
for the operation to complete and I'll update the patch ASAP.

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