[SCSI] qla2xxx: Add the ql2xdontresethba module_param.

Also, change the ISP82xx code to only reset if this module_param is set
and reset is intended via the QLA82XX_DEV_NEED_RESET case.

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/qla2xxx/qla_gbl.h

@@ -102,6 +102,7 @@ extern int ql2xgffidenable;
 extern int ql2xenabledif;
 extern int ql2xenablehba_err_chk;
 extern int ql2xtargetreset;
+extern int ql2xdontresethba;
 
 extern int qla2x00_loop_reset(scsi_qla_host_t *);
 extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);

drivers/scsi/qla2xxx/qla_nx.c

@@ -3585,6 +3585,7 @@ qla82xx_device_state_handler(scsi_qla_host_t *vha)
 			qla82xx_idc_lock(ha);
 			break;
 		case QLA82XX_DEV_NEED_RESET:
+		    if (!ql2xdontresethba)
 			qla82xx_need_reset_handler(vha);
 			dev_init_timeout = jiffies +
 				(ha->nx_dev_init_timeout * HZ);

drivers/scsi/qla2xxx/qla_os.c

@@ -164,6 +164,14 @@ module_param(ql2xasynctmfenable, int, S_IRUGO);
 MODULE_PARM_DESC(ql2xasynctmfenable,
 		"Enables issue of TM IOCBs asynchronously via IOCB mechanism"
 		"Default is 0 - Issue TM IOCBs via mailbox mechanism.");
+
+int ql2xdontresethba;
+module_param(ql2xdontresethba, int, S_IRUGO);
+MODULE_PARM_DESC(ql2xdontresethba,
+	"Option to specify reset behaviour\n"
+	" 0 (Default) -- Reset on failure.\n"
+	" 1 -- Do not reset on failure.\n");
+
 /*
  * SCSI host template entry points
  */