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authorHannes Reinecke <hare@suse.de>2015-12-01 10:16:43 +0100
committerMartin K. Petersen <martin.petersen@oracle.com>2015-12-02 22:30:46 +0100
commitdb5a6a601ba93c69dd320a0625ce492543c37748 (patch)
tree72bd9320ba96ca0ecd00e9e563ffe2d3110dfd77 /drivers
parentscsi: ignore errors from scsi_dh_add_device() (diff)
downloadlinux-db5a6a601ba93c69dd320a0625ce492543c37748.tar.xz
linux-db5a6a601ba93c69dd320a0625ce492543c37748.zip
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 <hare@suse.de> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/device_handler/scsi_dh_alua.c12
1 files changed, 12 insertions, 0 deletions
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: