[PATCH] qla4xxx: bug fix: driver hardware semaphore needs to be grabbed before soft reset

On qla4xxx, the driver needs to grab the drvr semaphore provided by
the hardware, prior to issuing a reset. This patches takes care of a
couple of places where it was not being done. In addition there is
minor clean up.
Signed-off-by: David Somayajulu <david.somayajulu@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/qla4xxx/ql4_glbl.h

@@ -8,6 +8,7 @@
 #ifndef __QLA4x_GBL_H
 #define	__QLA4x_GBL_H
 
+int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a);
 int qla4xxx_send_tgts(struct scsi_qla_host *ha, char *ip, uint16_t port);
 int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb);
 int qla4xxx_initialize_adapter(struct scsi_qla_host * ha,

drivers/scsi/qla4xxx/ql4_init.c

@@ -978,7 +978,7 @@ static int qla4xxx_start_firmware_from_flash(struct scsi_qla_host *ha)
 	return status;
 }
 
-static int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
+int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
 {
 #define QL4_LOCK_DRVR_WAIT	300
 #define QL4_LOCK_DRVR_SLEEP	100

drivers/scsi/qla4xxx/ql4_os.c

@@ -919,18 +919,11 @@ static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
 	if (status == QLA_SUCCESS) {
 		DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
 			      ha->host_no, __func__));
-		status = qla4xxx_soft_reset(ha);
-	}
-	/* FIXMEkaren: Do we want to keep interrupts enabled and process
-	   AENs after soft reset */
-
-	/* If firmware (SOFT) reset failed, or if all outstanding
-	 * commands have not returned, then do a HARD reset.
-	 */
-	if (status == QLA_ERROR) {
-		DEBUG2(printk("scsi%ld: %s - Performing hard reset..\n",
-			      ha->host_no, __func__));
-		status = qla4xxx_hard_reset(ha);
+		qla4xxx_flush_active_srbs(ha);
+		if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
+			status = qla4xxx_soft_reset(ha);
+		else
+			status = QLA_ERROR;
 	}
 
 	/* Flush any pending ddb changed AENs */
@@ -1016,13 +1009,9 @@ static void qla4xxx_do_dpc(void *data)
 	struct scsi_qla_host *ha = (struct scsi_qla_host *) data;
 	struct ddb_entry *ddb_entry, *dtemp;
 
-	DEBUG2(printk("scsi%ld: %s: DPC handler waking up.\n",
-		      ha->host_no, __func__));
-
-	DEBUG2(printk("scsi%ld: %s: ha->flags = 0x%08lx\n",
-		      ha->host_no, __func__, ha->flags));
-	DEBUG2(printk("scsi%ld: %s: ha->dpc_flags = 0x%08lx\n",
-		      ha->host_no, __func__, ha->dpc_flags));
+	DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
+		"flags = 0x%08lx, dpc_flags = 0x%08lx\n",
+		ha->host_no, __func__, ha->flags, ha->dpc_flags));
 
 	/* Initialization not yet finished. Don't do anything yet. */
 	if (!test_bit(AF_INIT_DONE, &ha->flags))
@@ -1032,16 +1021,8 @@ static void qla4xxx_do_dpc(void *data)
 	    test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
 	    test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
 	    test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
-		if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags))
-			/*
-			 * dg 09/23 Never initialize ddb list
-			 * once we up and running
-			 * qla4xxx_recover_adapter(ha,
-			 *    REBUILD_DDB_LIST);
-			 */
-			qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
-
-		if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
+		if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
+			test_bit(DPC_RESET_HA, &ha->dpc_flags))
 			qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
 
 		if (test_and_clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
@@ -1122,7 +1103,8 @@ static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
 		destroy_workqueue(ha->dpc_thread);
 
 	/* Issue Soft Reset to put firmware in unknown state */
-	qla4xxx_soft_reset(ha);
+	if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
+		qla4xxx_soft_reset(ha);
 
 	/* Remove timer thread, if present */
 	if (ha->timer_active)

drivers/scsi/qla4xxx/ql4_version.h

@@ -5,9 +5,4 @@
  * See LICENSE.qla4xxx for copyright and licensing details.
  */
 
-#define QLA4XXX_DRIVER_VERSION	"5.00.05b9-k"
-
-#define QL4_DRIVER_MAJOR_VER	5
-#define QL4_DRIVER_MINOR_VER	0
-#define QL4_DRIVER_PATCH_VER	5
-#define QL4_DRIVER_BETA_VER	9
+#define QLA4XXX_DRIVER_VERSION	"5.00.06-k"