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authorNicholas Bellinger <nab@linux-iscsi.org>2016-06-13 22:58:09 -0700
committerNicholas Bellinger <nab@linux-iscsi.org>2016-07-20 00:58:40 -0700
commit410c29dfbfdf73d0d0b5d14a21868ab038eca703 (patch)
tree97fb83380b69b398a4d263f47912a397d3f09b9e /include/target
parentdff0ca9ea7dc8be2181a62df4a722c32ce68ff4a (diff)
downloadlinux-stericsson-410c29dfbfdf73d0d0b5d14a21868ab038eca703.tar.gz
target: Fix ordered task CHECK_CONDITION early exception handling
If a Simple command is sent with a failure, target_setup_cmd_from_cdb returns with TCM_UNSUPPORTED_SCSI_OPCODE or TCM_INVALID_CDB_FIELD. So in the cases where target_setup_cmd_from_cdb returns an error, we never get far enough to call target_execute_cmd to increment simple_cmds. Since simple_cmds isn't incremented, the result of the failure from target_setup_cmd_from_cdb causes transport_generic_request_failure to decrement simple_cmds, due to call to transport_complete_task_attr. With this dev->simple_cmds or dev->dev_ordered_sync is now -1, not 0. So when a subsequent command with an Ordered Task is sent, it causes a hang, since dev->simple_cmds is at -1. Tested-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Signed-off-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Tested-by: Michael Cyr <mikecyr@linux.vnet.ibm.com> Signed-off-by: Michael Cyr <mikecyr@linux.vnet.ibm.com> Cc: stable@vger.kernel.org # 4.4+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target')
-rw-r--r--include/target/target_core_base.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index b316b44d03f3..fb8e3b6febdf 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -142,6 +142,7 @@ enum se_cmd_flags_table {
SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
SCF_ACK_KREF = 0x00400000,
SCF_USE_CPUID = 0x00800000,
+ SCF_TASK_ATTR_SET = 0x01000000,
};
/*