From: Hannes Reinecke Date: Tue, 1 Dec 2015 09:16:43 +0000 (+0100) Subject: scsi_dh_alua: Disable ALUA handling for non-disk devices X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=db5a6a601ba93c69dd320a0625ce492543c37748;p=linux-beck.git 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: Hannes Reinecke Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Reviewed-by: Johannes Thumshirn Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index cc2773b5de68..7d01ef0b66cc 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -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: