[ 16/27] target: Fix incorrect fallthrough of ALUA Standby/Offline/Transition CDBs

[Greg Kroah-Hartman]

3.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>

commit 30f359a6f9da65a66de8cadf959f0f4a0d498bba upstream.

This patch fixes a bug where a handful of informational / control CDBs
that should be allowed during ALUA access state Standby/Offline/Transition
where incorrectly returning CHECK_CONDITION + ASCQ_04H_ALUA_TG_PT_*.

This includes INQUIRY + REPORT_LUNS, which would end up preventing LUN
registration when LUN scanning occured during these ALUA access states.

Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/target/target_core_alua.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/target/target_core_alua.c
+++ b/drivers/target/target_core_alua.c
@@ -408,6 +408,7 @@ static inline int core_alua_state_standb
 	case REPORT_LUNS:
 	case RECEIVE_DIAGNOSTIC:
 	case SEND_DIAGNOSTIC:
+		return 0;
 	case MAINTENANCE_IN:
 		switch (cdb[1] & 0x1f) {
 		case MI_REPORT_TARGET_PGS:
@@ -450,6 +451,7 @@ static inline int core_alua_state_unavai
 	switch (cdb[0]) {
 	case INQUIRY:
 	case REPORT_LUNS:
+		return 0;
 	case MAINTENANCE_IN:
 		switch (cdb[1] & 0x1f) {
 		case MI_REPORT_TARGET_PGS:
@@ -490,6 +492,7 @@ static inline int core_alua_state_transi
 	switch (cdb[0]) {
 	case INQUIRY:
 	case REPORT_LUNS:
+		return 0;
 	case MAINTENANCE_IN:
 		switch (cdb[1] & 0x1f) {
 		case MI_REPORT_TARGET_PGS:


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