Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "The usual driver updates (ufs, qla2xxx, tcmu, ibmvfc, lpfc, smartpqi,
  hisi_sas, qedi, qedf, mpt3sas) and minor bug fixes.

  There are only three core changes: adding sense codes, cleaning up
  noretry and adding an option for limitless retries"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (226 commits)
  scsi: hisi_sas: Recover PHY state according to the status before reset
  scsi: hisi_sas: Filter out new PHY up events during suspend
  scsi: hisi_sas: Add device link between SCSI devices and hisi_hba
  scsi: hisi_sas: Add check for methods _PS0 and _PR0
  scsi: hisi_sas: Add controller runtime PM support for v3 hw
  scsi: hisi_sas: Switch to new framework to support suspend and resume
  scsi: hisi_sas: Use hisi_hba->cq_nvecs for calling calling synchronize_irq()
  scsi: qedf: Remove redundant assignment to variable 'rc'
  scsi: lpfc: Remove unneeded variable 'status' in lpfc_fcp_cpu_map_store()
  scsi: snic: Convert to use DEFINE_SEQ_ATTRIBUTE macro
  scsi: qla4xxx: Delete unneeded variable 'status' in qla4xxx_process_ddb_changed
  scsi: sun_esp: Use module_platform_driver to simplify the code
  scsi: sun3x_esp: Use module_platform_driver to simplify the code
  scsi: sni_53c710: Use module_platform_driver to simplify the code
  scsi: qlogicpti: Use module_platform_driver to simplify the code
  scsi: mac_esp: Use module_platform_driver to simplify the code
  scsi: jazz_esp: Use module_platform_driver to simplify the code
  scsi: mvumi: Fix error return in mvumi_io_attach()
  scsi: lpfc: Drop nodelist reference on error in lpfc_gen_req()
  scsi: be2iscsi: Fix a theoretical leak in beiscsi_create_eqs()
  ...

drivers/scsi/scsi_error.c

@@ -116,6 +116,14 @@ static int scsi_host_eh_past_deadline(struct Scsi_Host *shost)
 	return 1;
 }
 
+static bool scsi_cmd_retry_allowed(struct scsi_cmnd *cmd)
+{
+	if (cmd->allowed == SCSI_CMD_RETRIES_NO_LIMIT)
+		return true;
+
+	return ++cmd->retries <= cmd->allowed;
+}
+
 /**
  * scmd_eh_abort_handler - Handle command aborts
  * @work:	command to be aborted.
@@ -151,7 +159,7 @@ scmd_eh_abort_handler(struct work_struct *work)
 						    "eh timeout, not retrying "
 						    "aborted command\n"));
 			} else if (!scsi_noretry_cmd(scmd) &&
-			    (++scmd->retries <= scmd->allowed)) {
+				   scsi_cmd_retry_allowed(scmd)) {
 				SCSI_LOG_ERROR_RECOVERY(3,
 					scmd_printk(KERN_WARNING, scmd,
 						    "retry aborted command\n"));
@@ -1264,11 +1272,18 @@ int scsi_eh_get_sense(struct list_head *work_q,
 		 * upper level.
 		 */
 		if (rtn == SUCCESS)
-			/* we don't want this command reissued, just
-			 * finished with the sense data, so set
-			 * retries to the max allowed to ensure it
-			 * won't get reissued */
-			scmd->retries = scmd->allowed;
+			/*
+			 * We don't want this command reissued, just finished
+			 * with the sense data, so set retries to the max
+			 * allowed to ensure it won't get reissued. If the user
+			 * has requested infinite retries, we also want to
+			 * finish this command, so force completion by setting
+			 * retries and allowed to the same value.
+			 */
+			if (scmd->allowed == SCSI_CMD_RETRIES_NO_LIMIT)
+				scmd->retries = scmd->allowed = 1;
+			else
+				scmd->retries = scmd->allowed;
 		else if (rtn != NEEDS_RETRY)
 			continue;
 
@@ -1755,8 +1770,8 @@ check_type:
 	if (scmd->request->cmd_flags & REQ_FAILFAST_DEV ||
 	    blk_rq_is_passthrough(scmd->request))
 		return 1;
-	else
-		return 0;
+
+	return 0;
 }
 
 /**
@@ -1944,8 +1959,7 @@ maybe_retry:
 	 * the request was not marked fast fail.  Note that above,
 	 * even if the request is marked fast fail, we still requeue
 	 * for queue congestion conditions (QUEUE_FULL or BUSY) */
-	if ((++scmd->retries) <= scmd->allowed
-	    && !scsi_noretry_cmd(scmd)) {
+	if (scsi_cmd_retry_allowed(scmd) && !scsi_noretry_cmd(scmd)) {
 		return NEEDS_RETRY;
 	} else {
 		/*
@@ -2091,8 +2105,7 @@ void scsi_eh_flush_done_q(struct list_head *done_q)
 	list_for_each_entry_safe(scmd, next, done_q, eh_entry) {
 		list_del_init(&scmd->eh_entry);
 		if (scsi_device_online(scmd->device) &&
-		    !scsi_noretry_cmd(scmd) &&
-		    (++scmd->retries <= scmd->allowed)) {
+		    !scsi_noretry_cmd(scmd) && scsi_cmd_retry_allowed(scmd)) {
 			SCSI_LOG_ERROR_RECOVERY(3,
 				scmd_printk(KERN_INFO, scmd,
 					     "%s: flush retry cmd\n",