From 28120be5d6830cd7c7777d8bf570bdb20abef58a Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Wed, 21 Dec 2005 14:28:06 -0800 Subject: [PATCH] [PATCH] USB Storage: Force starget->scsi_level in usb-storage scsiglue.c When the usb-storage module forces sdev->scsi_level to SCSI_2, it should also force starget->scsi_level to the same value. Otherwise, the SCSI layer may attempt to issue SCSI-3 commands to the device, such as REPORT LUNS, which it cannot handle. This can prevent the device from working with Linux. The AMS Venus DS3 DS2316SU2S SATA-to-SATA+USB enclosure, based on the Oxford Semiconductor OXU921S chip, requires this patch to function correctly on Linux. The enclosure reports a SCSI-3 SPC-2 command set level, but does not correctly handle the REPORT LUNS SCSI command - probably due to a bug in its firmware. It seems likely that other USB storage enclosures with similar bugs will also benefit from this patch. Tony Lindgren collaborated in the development of this patch. Signed-off-by: Paul Walmsley Signed-off-by: Greg Kroah-Hartman Signed-off-by: Linus Torvalds --- drivers/usb/storage/scsiglue.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index 4837524eada..4ef5527028c 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -109,7 +109,7 @@ static int slave_configure(struct scsi_device *sdev) * data comes from. */ if (sdev->scsi_level < SCSI_2) - sdev->scsi_level = SCSI_2; + sdev->scsi_level = sdev->sdev_target->scsi_level = SCSI_2; /* According to the technical support people at Genesys Logic, * devices using their chips have problems transferring more than @@ -162,7 +162,7 @@ static int slave_configure(struct scsi_device *sdev) * a Get-Max-LUN request, we won't lose much by setting the * revision level down to 2. The only devices that would be * affected are those with sparse LUNs. */ - sdev->scsi_level = SCSI_2; + sdev->scsi_level = sdev->sdev_target->scsi_level = SCSI_2; /* USB-IDE bridges tend to report SK = 0x04 (Non-recoverable * Hardware Error) when any low-level error occurs, -- 2.20.1