From 1143f6f55d967ab414a10a559d58a2700f32a54d Mon Sep 17 00:00:00 2001
From: Heiko Carstens <hca@linux.ibm.com>
Date: Sat, 19 Nov 2022 18:56:19 +0100
Subject: [PATCH] s390/sclp: allow to change sclp_console_drop during runtime
Make sclp's con_drop sysfs attribute also writable, and allow to
change its value during runtime. This way handling of sclp console
drop handling is consistent with the 3215 device driver.
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
---
drivers/s390/char/sclp.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index f0696f05a1861..8f74db689a0c2 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -1205,12 +1205,20 @@ static ssize_t con_pages_show(struct device_driver *dev, char *buf)
static DRIVER_ATTR_RO(con_pages);
+static ssize_t con_drop_store(struct device_driver *dev, const char *buf, size_t count)
+{
+ int rc;
+
+ rc = kstrtobool(buf, &sclp_console_drop);
+ return rc ?: count;
+}
+
static ssize_t con_drop_show(struct device_driver *dev, char *buf)
{
return sysfs_emit(buf, "%i\n", sclp_console_drop);
}
-static DRIVER_ATTR_RO(con_drop);
+static DRIVER_ATTR_RW(con_drop);
static ssize_t con_full_show(struct device_driver *dev, char *buf)
{
--
2.30.2