[049/126] target: Fix incorrect fallthrough of ALUA Standby/Offline/TransitionCDBs

[Steven Rostedt]

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

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

From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>

[ Upstream commit 30f359a6f9da65a66de8cadf959f0f4a0d498bba ]

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.

Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 drivers/target/target_core_alua.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c
index 41641ba..61077ce 100644
--- a/drivers/target/target_core_alua.c
+++ b/drivers/target/target_core_alua.c
@@ -420,6 +420,7 @@ static inline int core_alua_state_standby(
 	case REPORT_LUNS:
 	case RECEIVE_DIAGNOSTIC:
 	case SEND_DIAGNOSTIC:
+		return 0;
 	case MAINTENANCE_IN:
 		switch (cdb[1] & 0x1f) {
 		case MI_REPORT_TARGET_PGS:
@@ -462,6 +463,7 @@ static inline int core_alua_state_unavailable(
 	switch (cdb[0]) {
 	case INQUIRY:
 	case REPORT_LUNS:
+		return 0;
 	case MAINTENANCE_IN:
 		switch (cdb[1] & 0x1f) {
 		case MI_REPORT_TARGET_PGS:
@@ -502,6 +504,7 @@ static inline int core_alua_state_transition(
 	switch (cdb[0]) {
 	case INQUIRY:
 	case REPORT_LUNS:
+		return 0;
 	case MAINTENANCE_IN:
 		switch (cdb[1] & 0x1f) {
 		case MI_REPORT_TARGET_PGS:
-- 
1.7.10.4


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/