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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2014-03-21 09:25:24 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-03-26 10:55:33 +0100
commit233faec97a1dfef1f4bc271f9e5d33f2ba4845ca (patch)
treecd42c8828846c9c73ecf867f9604af17bf7055f7 /drivers/s390
parent6e5a40a49fe16f8032c4dcd4fa5ff866da09d445 (diff)
downloadop-kernel-dev-233faec97a1dfef1f4bc271f9e5d33f2ba4845ca.zip
op-kernel-dev-233faec97a1dfef1f4bc271f9e5d33f2ba4845ca.tar.gz
s390/con3270: optionally disable auto update
This patch adds a parameter 'auto_update' to the con3270 driver, causing the 'auto_update' feature to be disabled if unset. The 'auto_update' feature will cause the con3270 driver to switch to the console view whenever new system messages are displayed, which makes working on the 3270 terminal awkward. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/char/con3270.c7
-rw-r--r--drivers/s390/char/raw3270.c9
-rw-r--r--drivers/s390/char/raw3270.h1
3 files changed, 17 insertions, 0 deletions
diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index bb6b0df5..75ffe99 100644
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -7,6 +7,7 @@
* Copyright IBM Corp. 2003, 2009
*/
+#include <linux/module.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/interrupt.h>
@@ -30,6 +31,9 @@
static struct raw3270_fn con3270_fn;
+static bool auto_update = 1;
+module_param(auto_update, bool, 0);
+
/*
* Main 3270 console view data structure.
*/
@@ -204,6 +208,8 @@ con3270_update(struct con3270 *cp)
struct string *s, *n;
int rc;
+ if (!auto_update && !raw3270_view_active(&cp->view))
+ return;
if (cp->view.dev)
raw3270_activate_view(&cp->view);
@@ -529,6 +535,7 @@ con3270_flush(void)
if (!cp->view.dev)
return;
raw3270_pm_unfreeze(&cp->view);
+ raw3270_activate_view(&cp->view);
spin_lock_irqsave(&cp->view.lock, flags);
con3270_wait_write(cp);
cp->nr_up = 0;
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 041c65b..9f849df 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -276,6 +276,15 @@ __raw3270_start(struct raw3270 *rp, struct raw3270_view *view,
}
int
+raw3270_view_active(struct raw3270_view *view)
+{
+ struct raw3270 *rp = view->dev;
+
+ return rp && rp->view == view &&
+ !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
+}
+
+int
raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
{
unsigned long flags;
diff --git a/drivers/s390/char/raw3270.h b/drivers/s390/char/raw3270.h
index 359276a..e1e41c2 100644
--- a/drivers/s390/char/raw3270.h
+++ b/drivers/s390/char/raw3270.h
@@ -173,6 +173,7 @@ int raw3270_start_locked(struct raw3270_view *, struct raw3270_request *);
int raw3270_start_irq(struct raw3270_view *, struct raw3270_request *);
int raw3270_reset(struct raw3270_view *);
struct raw3270_view *raw3270_view(struct raw3270_view *);
+int raw3270_view_active(struct raw3270_view *);
/* Reference count inliner for view structures. */
static inline void
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