Commit db5a6a60 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Martin K. Petersen

scsi_dh_alua: Disable ALUA handling for non-disk devices

Non-disk devices might support ALUA, but the firmware
implementation is untested and frequently broken.
As we're don't actually need it disable ALUA support
for non-disk device for now.
Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 221255ae
......@@ -320,6 +320,18 @@ static int alua_check_tpgs(struct scsi_device *sdev, struct alua_dh_data *h)
{
int err = SCSI_DH_OK;
/*
* ALUA support for non-disk devices is fraught with
* difficulties, so disable it for now.
*/
if (sdev->type != TYPE_DISK) {
h->tpgs = TPGS_MODE_NONE;
sdev_printk(KERN_INFO, sdev,
"%s: disable for non-disk devices\n",
ALUA_DH_NAME);
return SCSI_DH_DEV_UNSUPP;
}
h->tpgs = scsi_device_tpgs(sdev);
switch (h->tpgs) {
case TPGS_MODE_EXPLICIT|TPGS_MODE_IMPLICIT:
......
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