Re: [PATCH] fix kernel oops, when IDE-Device (CF-Card) is removed while mounted.

[Chuck Ebbert <76306.1226@compuserve.com>]

In-Reply-To: <58cb370e050913013677fec525@mail.gmail.com>

On Tue, 13 Sep 2005 at 10:36:42 +0200, Bartlomiej Zolnierkiewicz wrote:

> >  From your responses I read that the correct solution would be to keep
> > the old pysical device as long as the ide layer still has references to
> > it and to fail all requests in the meantime.
> > 
> > Is that correct?
> 
> Yes, we should just fail all the requests if the device is not present.
> [ What do you mean by the old physical device, old 'ide_drive_t *'? ]

 Jens Axboe posted this patch for the same problem on 2 Aug:

===========================================================================
=====
That's not quite true, q is not invalid after this call. It will only be
invalid when it is freed (which doesn't happen from here but rather from
the blk_cleanup_queue() call when the reference count drops to 0).

This is still not perfect, but a lot better. Does it work for you?

--- linux-2.6.12/drivers/ide/ide-disk.c~        2005-08-02
12:48:16.000000000 +0200
+++ linux-2.6.12/drivers/ide/ide-disk.c 2005-08-02 12:48:32.000000000 +0200
@@ -1054,6 +1054,7 @@
        drive->driver_data = NULL;
        drive->devfs_name[0] = '\0';
        g->private_data = NULL;
+       g->disk = NULL;
        put_disk(g);
        kfree(idkp);
 }
__
Chuck