[S390] Support for disconnected devices reappearing on another subchannel.
- create a 'pseudo_subchannel' per channel subsystem (the 'orphanage')
- use the orphanage as a shelter for ccw_devices that can't remain on the same
subchannel
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index ac845c1..71fe380 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -160,6 +160,8 @@
int cm_enabled;
void *cub_addr1;
void *cub_addr2;
+ /* for orphaned ccw devices */
+ struct subchannel *pseudo_subchannel;
};
#define to_css(dev) container_of(dev, struct channel_subsystem, device)
@@ -187,6 +189,8 @@
int css_slow_subchannels_exist(void);
extern int need_rescan;
+int sch_is_pseudo_sch(struct subchannel *);
+
extern struct workqueue_struct *slow_path_wq;
extern struct work_struct slow_path_work;