linux-kernel - [PATCH 4.6 02/81] scsi: Add QEMU CD-ROM to VPD Inquiry Blacklist

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Message-Id: <20160622223743.371245827@linuxfoundation.org>
Date:	Wed, 22 Jun 2016 15:45:25 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, "Ewan D. Milne" <emilne@...hat.com>,
	Jan Stancek <jstancek@...hat.com>,
	Johannes Thumshirn <jthumshirn@...e.de>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.6 02/81] scsi: Add QEMU CD-ROM to VPD Inquiry Blacklist

4.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ewan D. Milne <emilne@...hat.com>

commit fbd83006e3e536fcb103228d2422ea63129ccb03 upstream.

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.

Signed-off-by: Ewan D. Milne <emilne@...hat.com>
Reported-by: Jan Stancek <jstancek@...hat.com>
Tested-by: Jan Stancek <jstancek@...hat.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@...e.de>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/scsi_devinfo.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/scsi/scsi_devinfo.c
+++ b/drivers/scsi/scsi_devinfo.c
@@ -230,6 +230,7 @@ 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},