This patch allows SSU and Sync Cache commands to be sent to the controller
instead of driver returning DID_NO_CONNECT during driver unload to flush
any cached data from the drive.
Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx>
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Cc: sathya.prakash@xxxxxxxxxxxx
---
drivers/scsi/mpi3mr/mpi3mr_os.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
index 0a0e42d..221a850 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_os.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
@@ -2767,6 +2767,26 @@ static int mpi3mr_target_alloc(struct scsi_target *starget)
return retval;
}
+/**
+ * mpi3mr_allow_scmd_to_fw - Command is allowed during shutdown
+ * @scmd: SCSI Command reference
+ *
+ * Checks whether a cdb is allowed during shutdown or not.
+ *
+ * Return: TRUE for allowed commands, FALSE otherwise.
+ */
+
+inline bool mpi3mr_allow_scmd_to_fw(struct scsi_cmnd *scmd)
+{
+ switch (scmd->cmnd[0]) {
+ case SYNCHRONIZE_CACHE:
+ case START_STOP:
+ return true;
+ default:
+ return false;
+ }
+}
+
/**
* mpi3mr_qcmd - I/O request despatcher
* @shost: SCSI Host reference
@@ -2802,7 +2822,8 @@ static int mpi3mr_qcmd(struct Scsi_Host *shost,
goto out;
}
- if (mrioc->stop_drv_processing) {
+ if (mrioc->stop_drv_processing &&
+ !(mpi3mr_allow_scmd_to_fw(scmd))) {
scmd->result = DID_NO_CONNECT << 16;
scmd->scsi_done(scmd);
goto out;
--
2.18.1
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