isci: Implement waiting for suspend in the abort path.

In order to prevent a device from receiving an I/O request while still
in an RNC suspending or resuming state (and therefore failing that
I/O back to libsas with a reset required status) wait for the RNC state
change before proceding in the abort path.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/scsi/isci/remote_node_context.h b/drivers/scsi/isci/remote_node_context.h
index 9eee304fdf9a..c61c02e095ad 100644
--- a/drivers/scsi/isci/remote_node_context.h
+++ b/drivers/scsi/isci/remote_node_context.h
@@ -170,6 +170,7 @@ struct sci_remote_node_context {
          */
         u32 suspend_type;
         enum sci_remote_node_suspension_reasons suspend_reason;
+        u32 suspend_count;
 
         /**
          * This field is true if the remote node context is resuming from its current
@@ -203,6 +204,8 @@ void sci_remote_node_context_construct(struct sci_remote_node_context *rnc,
 bool sci_remote_node_context_is_ready(
         struct sci_remote_node_context *sci_rnc);
 
+bool sci_remote_node_context_is_suspended(struct sci_remote_node_context *sci_rnc);
+
 enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_context *sci_rnc,
                                                            u32 event_code);
 enum sci_status sci_remote_node_context_destruct(struct sci_remote_node_context *sci_rnc,