Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

1 files changed, 37 insertions, 26 deletions

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index bbcd5e9206e..70880be2601 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1534,6 +1534,10 @@ static void dasd_eckd_validate_server(struct dasd_device *device)
 	struct dasd_eckd_private *private;
 	int enable_pav;
 
+	private = (struct dasd_eckd_private *) device->private;
+	if (private->uid.type == UA_BASE_PAV_ALIAS ||
+	    private->uid.type == UA_HYPER_PAV_ALIAS)
+		return;
 	if (dasd_nopav || MACHINE_IS_VM)
 		enable_pav = 0;
 	else
@@ -1542,11 +1546,28 @@ static void dasd_eckd_validate_server(struct dasd_device *device)
 
 	/* may be requested feature is not available on server,
 	 * therefore just report error and go ahead */
-	private = (struct dasd_eckd_private *) device->private;
 	DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
 			"returned rc=%d", private->uid.ssid, rc);
 }
 
+/*
+ * worker to do a validate server in case of a lost pathgroup
+ */
+static void dasd_eckd_do_validate_server(struct work_struct *work)
+{
+	struct dasd_device *device = container_of(work, struct dasd_device,
+						  kick_validate);
+	dasd_eckd_validate_server(device);
+	dasd_put_device(device);
+}
+
+static void dasd_eckd_kick_validate_server(struct dasd_device *device)
+{
+	dasd_get_device(device);
+	/* queue call to do_validate_server to the kernel event daemon. */
+	schedule_work(&device->kick_validate);
+}
+
 static u32 get_fcx_max_data(struct dasd_device *device)
 {
 #if defined(CONFIG_64BIT)
@@ -1588,10 +1609,13 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
 	struct dasd_eckd_private *private;
 	struct dasd_block *block;
 	struct dasd_uid temp_uid;
-	int is_known, rc, i;
+	int rc, i;
 	int readonly;
 	unsigned long value;
 
+	/* setup work queue for validate server*/
+	INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
+
 	if (!ccw_device_is_pathgroup(device->cdev)) {
 		dev_warn(&device->cdev->dev,
 			 "A channel path group could not be established\n");
@@ -1651,22 +1675,12 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
 		block->base = device;
 	}
 
-	/* register lcu with alias handling, enable PAV if this is a new lcu */
-	is_known = dasd_alias_make_device_known_to_lcu(device);
-	if (is_known < 0) {
-		rc = is_known;
+	/* register lcu with alias handling, enable PAV */
+	rc = dasd_alias_make_device_known_to_lcu(device);
+	if (rc)
 		goto out_err2;
-	}
-	/*
-	 * dasd_eckd_validate_server is done on the first device that
-	 * is found for an LCU. All later other devices have to wait
-	 * for it, so they will read the correct feature codes.
-	 */
-	if (!is_known) {
-		dasd_eckd_validate_server(device);
-		dasd_alias_lcu_setup_complete(device);
-	} else
-		dasd_alias_wait_for_lcu_setup(device);
+
+	dasd_eckd_validate_server(device);
 
 	/* device may report different configuration data after LCU setup */
 	rc = dasd_eckd_read_conf(device);
@@ -4098,7 +4112,7 @@ static int dasd_eckd_restore_device(struct dasd_device *device)
 {
 	struct dasd_eckd_private *private;
 	struct dasd_eckd_characteristics temp_rdc_data;
-	int is_known, rc;
+	int rc;
 	struct dasd_uid temp_uid;
 	unsigned long flags;
 
@@ -4121,14 +4135,10 @@ static int dasd_eckd_restore_device(struct dasd_device *device)
 		goto out_err;
 
 	/* register lcu with alias handling, enable PAV if this is a new lcu */
-	is_known = dasd_alias_make_device_known_to_lcu(device);
-	if (is_known < 0)
-		return is_known;
-	if (!is_known) {
-		dasd_eckd_validate_server(device);
-		dasd_alias_lcu_setup_complete(device);
-	} else
-		dasd_alias_wait_for_lcu_setup(device);
+	rc = dasd_alias_make_device_known_to_lcu(device);
+	if (rc)
+		return rc;
+	dasd_eckd_validate_server(device);
 
 	/* RE-Read Configuration Data */
 	rc = dasd_eckd_read_conf(device);
@@ -4270,6 +4280,7 @@ static struct dasd_discipline dasd_eckd_discipline = {
 	.restore = dasd_eckd_restore_device,
 	.reload = dasd_eckd_reload_device,
 	.get_uid = dasd_eckd_get_uid,
+	.kick_validate = dasd_eckd_kick_validate_server,
 };
 
 static int __init