From 2053a1db41193c2b5e1f47a91aaba0fd63ba7102 Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Tue, 8 Oct 2013 09:47:22 -0700 Subject: target: Fix assignment of LUN in tracepoints The unpacked_lun field in the SCSI target tracepoints should be initialized with cmd->orig_fe_lun rather than cmd->se_lun->unpacked_lun for two reasons: - most importantly, if we are in the cmd_complete tracepoint returning a check condition due to no LUN found, cmd->se_lun will be NULL and we'll crash trying to dereference it. - also, in any case, cmd->se_lun->unpacked_lun is an internal index into the target's internal set of LUNs; cmd->orig_fe_lun is much more useful and interesting, since it's the value the initiator actually sent. Signed-off-by: Roland Dreier Cc: # 3.11+ Signed-off-by: Nicholas Bellinger --- include/trace/events/target.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/trace/events/target.h b/include/trace/events/target.h index aef8fc35402..da9cc0f05c9 100644 --- a/include/trace/events/target.h +++ b/include/trace/events/target.h @@ -144,7 +144,7 @@ TRACE_EVENT(target_sequencer_start, ), TP_fast_assign( - __entry->unpacked_lun = cmd->se_lun->unpacked_lun; + __entry->unpacked_lun = cmd->orig_fe_lun; __entry->opcode = cmd->t_task_cdb[0]; __entry->data_length = cmd->data_length; __entry->task_attribute = cmd->sam_task_attr; @@ -182,7 +182,7 @@ TRACE_EVENT(target_cmd_complete, ), TP_fast_assign( - __entry->unpacked_lun = cmd->se_lun->unpacked_lun; + __entry->unpacked_lun = cmd->orig_fe_lun; __entry->opcode = cmd->t_task_cdb[0]; __entry->data_length = cmd->data_length; __entry->task_attribute = cmd->sam_task_attr; -- cgit v1.2.3