On 05/31/2016 03:42 PM, Ewan D. Milne wrote:
> Linux fails to boot as a guest with a QEMU CD-ROM:
>
> [ 4.439488] ata2.00: ATAPI: QEMU CD-ROM, 0.8.2, max UDMA/100
> [ 4.443649] ata2.00: configured for MWDMA2
> [ 4.450267] scsi 1:0:0:0: CD-ROM QEMU QEMU CD-ROM 0.8. PQ: 0 ANSI: 5
> [ 4.464317] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 4.464319] ata2.00: BMDMA stat 0x5
> [ 4.464339] ata2.00: cmd a0/01:00:00:00:01/00:00:00:00:00/a0 tag 0 dma 16640 in
> [ 4.464339] Inquiry 12 01 00 00 ff 00res 48/20:02:00:24:00/00:00:00:00:00/a0 Emask 0x2 (HSM violation)
> [ 4.464341] ata2.00: status: { DRDY DRQ }
> [ 4.465864] ata2: soft resetting link
> [ 4.625971] ata2.00: configured for MWDMA2
> [ 4.628290] ata2: EH complete
> [ 4.646670] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 4.646671] ata2.00: BMDMA stat 0x5
> [ 4.646683] ata2.00: cmd a0/01:00:00:00:01/00:00:00:00:00/a0 tag 0 dma 16640 in
> [ 4.646683] Inquiry 12 01 00 00 ff 00res 48/20:02:00:24:00/00:00:00:00:00/a0 Emask 0x2 (HSM violation)
> [ 4.646685] ata2.00: status: { DRDY DRQ }
> [ 4.648193] ata2: soft resetting link
>
> ...
>
> Fix this by suppressing VPD inquiry for this device.
>
> Reported-by: Jan Stancek <jstancek@xxxxxxxxxx>
> Tested-by: Jan Stancek <jstancek@xxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Ewan D. Milne <emilne@xxxxxxxxxx>
> ---
> drivers/scsi/scsi_devinfo.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
> index bbfbfd9..09bbd3f 100644
> --- a/drivers/scsi/scsi_devinfo.c
> +++ b/drivers/scsi/scsi_devinfo.c
> @@ -228,6 +228,7 @@ static struct {
> {"PIONEER", "CD-ROM DRM-624X", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
> {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC},
> {"Promise", "", NULL, BLIST_SPARSELUN},
> + {"QEMU", "QEMU CD-ROM", NULL, BLIST_SKIP_VPD_PAGES},
> {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024},
> {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024},
> {"QUANTUM", "XP34301", "1071", BLIST_NOTQ},
>
This doesn't apply to all versions of QEMU (upstream qemu works fine),
so at the very least it needs to be restricted to a specific version.
At the same time I'd _rather_ like to figure out why things break in the
first place.
QEMU CD-ROM claims to support SPC-3, for which VPD pages are mandatory.
So why is this error generated?
Either way, this patch is wrong.
NACK.
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@xxxxxxx +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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