Re: IDE problems with rmmod ide-cd
From: Bartlomiej Zolnierkiewicz
Date: Thu Apr 28 2005 - 17:23:29 EST
On 4/28/05, Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote:
> On Iau, 2005-04-28 at 21:46, Bartlomiej Zolnierkiewicz wrote:
> > > The problem you are thinking of was also an ATAPI cache flush command,
> > > so I'm not so sure I would call it harmless... I haven't changed
> > > anything in there recently, Bart?
> > I don't remember changing anything there recently.
> > Alan, please give more details of the issue.
> Torvalds tree - head
> Hardware is as follows
> Promise IDE controller on ide0/1 - no drives
> VIA IDE controller on ide2/3 - hdd is a DVD-ROM
> and hdg is a disk.
> hdd: TOSHIBA DVD-ROM SD-M1212
> I had some code logging the commands issued and I did rmmod ide-cd. At
> that point it sent a cache flush to the drive which then errorred it.
> The actual log entry is
> hdd: packet command error
> Gives status=0x51, error=0x50
> Dumping the error in detail its
> Error;Illegal Request (Sense 0x05)
> Invalid command operation code (0x20, 0x00)
> The failed "Flush cache" packet command was
> "35 00 00 00 00 00 ... 00"
I would suggest auditing MRW support in cdrom.c.
IDE layer itself never sends GPCMD_FLUSH_CACHE.
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