[10/20] revert commit a8e5a2d593cb ("[SCSI] scsi_dh_alua: ALUA handler attach should succeed while TPG is transitioning")

Commit Message

Hannes Reinecke Dec. 8, 2015, 7:37 a.m. UTC

Obsoleted by the next patch.

Reviewed-by: Ewan Milne <[e-mail]>
Signed-off-by: Hannes Reinecke <[e-mail]>
---
 drivers/scsi/device_handler/scsi_dh_alua.c | 31 ++++++++++++------------------
 1 file changed, 12 insertions(+), 19 deletions(-)

Comments

Christoph Hellwig Dec. 30, 2015, 11:22 a.m. UTC | #1

Maybe this should be folded into the next patch?

Otherwise looks fine:

Reviewed-by: Christoph Hellwig <[e-mail]>
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Hannes Reinecke Dec. 31, 2015, 12:54 p.m. UTC | #2

On 12/30/2015 12:22 PM, Christoph Hellwig wrote:
> Maybe this should be folded into the next patch?
>
I did it on purpose, as this really is a clean revert,

> Otherwise looks fine:
>
> Reviewed-by: Christoph Hellwig <[e-mail]>
>
Cheers,

Hannes

Patch

diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index 1eacf3f..8d80ac6 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -91,7 +91,7 @@  struct alua_dh_data {
 #define ALUA_POLICY_SWITCH_CURRENT	0
 #define ALUA_POLICY_SWITCH_ALL		1
 
-static int alua_rtpg(struct scsi_device *, struct alua_port_group *, int);
+static int alua_rtpg(struct scsi_device *, struct alua_port_group *);
 static char print_alua_state(int);
 
 static void release_port_group(struct kref *kref)
@@ -331,7 +331,7 @@  static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h,
 	if (!h->pg)
 		return SCSI_DH_NOMEM;
 
-	return alua_rtpg(sdev, h->pg, 0);
+	return alua_rtpg(sdev, h->pg);
 }
 
 static char print_alua_state(int state)
@@ -414,13 +414,12 @@  static int alua_check_sense(struct scsi_device *sdev,
 /*
  * alua_rtpg - Evaluate REPORT TARGET GROUP STATES
  * @sdev: the device to be evaluated.
- * @wait_for_transition: if nonzero, wait ALUA_FAILOVER_TIMEOUT seconds for device to exit transitioning state
  *
  * Evaluate the Target Port Group State.
  * Returns SCSI_DH_DEV_OFFLINED if the path is
  * found to be unusable.
  */
-static int alua_rtpg(struct scsi_device *sdev, struct alua_port_group *pg, int wait_for_transition)
+static int alua_rtpg(struct scsi_device *sdev, struct alua_port_group *pg)
 {
 	struct scsi_sense_hdr sense_hdr;
 	int len, k, off, valid_states = 0, bufflen = ALUA_RTPG_SIZE;
@@ -511,8 +510,7 @@  static int alua_rtpg(struct scsi_device *sdev, struct alua_port_group *pg, int w
 	else
 		pg->transition_tmo = ALUA_FAILOVER_TIMEOUT;
 
-	if (wait_for_transition &&
-	    (orig_transition_tmo != pg->transition_tmo)) {
+	if (orig_transition_tmo != pg->transition_tmo) {
 		sdev_printk(KERN_INFO, sdev,
 			    "%s: transition timeout set to %d seconds\n",
 			    ALUA_DH_NAME, pg->transition_tmo);
@@ -550,19 +548,14 @@  static int alua_rtpg(struct scsi_device *sdev, struct alua_port_group *pg, int w
 
 	switch (pg->state) {
 	case TPGS_STATE_TRANSITIONING:
-		if (wait_for_transition) {
-			if (time_before(jiffies, expiry)) {
-				/* State transition, retry */
-				interval += 2000;
-				msleep(interval);
-				goto retry;
-			}
-			err = SCSI_DH_RETRY;
-		} else {
-			err = SCSI_DH_OK;
+		if (time_before(jiffies, expiry)) {
+			/* State transition, retry */
+			interval += 2000;
+			msleep(interval);
+			goto retry;
 		}
-
 		/* Transitioning time exceeded, set port to standby */
+		err = SCSI_DH_RETRY;
 		pg->state = TPGS_STATE_STANDBY;
 		break;
 	case TPGS_STATE_OFFLINE:
@@ -723,14 +716,14 @@  static int alua_activate(struct scsi_device *sdev,
 	if (optimize_stpg)
 		h->pg->flags |= ALUA_OPTIMIZE_STPG;
 
-	err = alua_rtpg(sdev, h->pg, 1);
+	err = alua_rtpg(sdev, h->pg);
 	if (err != SCSI_DH_OK) {
 		kref_put(&h->pg->kref, release_port_group);
 		goto out;
 	}
 	err = alua_stpg(sdev, h->pg);
 	if (err == SCSI_DH_RETRY)
-		err = alua_rtpg(sdev, h->pg, 1);
+		err = alua_rtpg(sdev, h->pg);
 	kref_put(&h->pg->kref, release_port_group);
 out:
 	if (fn)