Re: 2.6.0, cdrom still showing directories after being erased

[Jens Axboe <axboe@suse.de>]

On Thu, Feb 05 2004, Thomas Glanzmann wrote:
> > I still think this is to be expected when mucking in undefined teritory.
> > Reload the media, it's not hard... Sure you can get around this with
> > snooping if you really wanted to, but IMO it's wasted effort. Add -eject
> > to cdrecord command line of default config, how you want so solve it is
> > not my problem.
> 
> I don't understand why the Linux kernel doesn't simply invalidates the
> buffers when a CDROM media is unmounted. If this would be case no such
> problems would ever occur.

Actually, that would be an acceptable work around to me. The buffers are
invalidated in the block device page cache on last close, should be easy
enough to kill the driver private TOC cache as well.

===== drivers/ide/ide-cd.c 1.68 vs edited =====
--- 1.68/drivers/ide/ide-cd.c	Wed Feb  4 06:37:42 2004
+++ edited/drivers/ide/ide-cd.c	Thu Feb  5 22:28:50 2004
@@ -2860,6 +2860,10 @@
 static
 void ide_cdrom_release_real (struct cdrom_device_info *cdi)
 {
+	ide_drive_t *drive = cdi->handle;
+
+	if (!cdi->use_count)
+		CDROM_STATE_FLAGS(drive)->toc_valid = 0;
 }
 
 

-- 
Jens Axboe