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s390/sclp: allow to change sclp_console_drop during runtime

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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>
This commit is contained in:
Heiko Carstens 2022-11-19 18:56:19 +01:00 committed by Alexander Gordeev
parent a086c53de9
commit 1143f6f55d
1 changed files with 9 additions and 1 deletions
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10
drivers/s390/char/sclp.c
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@ -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)
{