[S390] dasd: revalidate server for new pathgroup
If a pathgroup is established we get an event and have to revalidate the server to propagate supported features like PAV and enable them. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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3 changed files with 30 additions and 0 deletions
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@ -3261,6 +3261,12 @@ void dasd_generic_path_event(struct ccw_device *cdev, int *path_event)
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device->path_data.tbvpm |= eventlpm;
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dasd_schedule_device_bh(device);
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}
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if (path_event[chp] & PE_PATHGROUP_ESTABLISHED) {
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DBF_DEV_EVENT(DBF_WARNING, device, "%s",
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"Pathgroup re-established\n");
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if (device->discipline->kick_validate)
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device->discipline->kick_validate(device);
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}
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}
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dasd_put_device(device);
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}
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@ -1550,6 +1550,24 @@ static void dasd_eckd_validate_server(struct dasd_device *device)
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"returned rc=%d", private->uid.ssid, rc);
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}
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/*
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* worker to do a validate server in case of a lost pathgroup
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*/
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static void dasd_eckd_do_validate_server(struct work_struct *work)
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{
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struct dasd_device *device = container_of(work, struct dasd_device,
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kick_validate);
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dasd_eckd_validate_server(device);
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dasd_put_device(device);
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}
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static void dasd_eckd_kick_validate_server(struct dasd_device *device)
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{
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dasd_get_device(device);
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/* queue call to do_validate_server to the kernel event daemon. */
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schedule_work(&device->kick_validate);
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}
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static u32 get_fcx_max_data(struct dasd_device *device)
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{
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#if defined(CONFIG_64BIT)
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@ -1595,6 +1613,9 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
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int readonly;
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unsigned long value;
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/* setup work queue for validate server*/
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INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
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if (!ccw_device_is_pathgroup(device->cdev)) {
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dev_warn(&device->cdev->dev,
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"A channel path group could not be established\n");
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@ -4259,6 +4280,7 @@ static struct dasd_discipline dasd_eckd_discipline = {
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.restore = dasd_eckd_restore_device,
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.reload = dasd_eckd_reload_device,
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.get_uid = dasd_eckd_get_uid,
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.kick_validate = dasd_eckd_kick_validate_server,
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};
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static int __init
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@ -355,6 +355,7 @@ struct dasd_discipline {
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int (*reload) (struct dasd_device *);
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int (*get_uid) (struct dasd_device *, struct dasd_uid *);
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void (*kick_validate) (struct dasd_device *);
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};
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extern struct dasd_discipline *dasd_diag_discipline_pointer;
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@ -455,6 +456,7 @@ struct dasd_device {
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struct work_struct kick_work;
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struct work_struct restore_device;
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struct work_struct reload_device;
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struct work_struct kick_validate;
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struct timer_list timer;
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debug_info_t *debug_area;
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