[S390] cio: Disable channel path measurements on shutdown/reboot. (a55360df) · Commits · 戴 / test

drivers/s390/cio/css.c

+29 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,7 @@
		#include <linux/slab.h>
		#include <linux/errno.h>
		#include <linux/list.h>
		#include <linux/reboot.h>

		#include "css.h"
		#include "cio.h"
		@@ -632,6 +633,29 @@ static int __init setup_css(int nr)
		return 0;
		}

		static int css_reboot_event(struct notifier_block *this,
		unsigned long event,
		void *ptr)
		{
		int ret, i;

		ret = NOTIFY_DONE;
		for (i = 0; i <= __MAX_CSSID; i++) {
		struct channel_subsystem *css;

		css = channel_subsystems[i];
		if (css->cm_enabled)
		if (chsc_secm(css, 0))
		ret = NOTIFY_BAD;
		}

		return ret;
		}

		static struct notifier_block css_reboot_notifier = {
		.notifier_call = css_reboot_event,
		};

		/*
		* Now that the driver core is running, we can setup our channel subsystem.
		* The struct subchannel's are created during probing (except for the
		@@ -697,12 +721,17 @@ init_channel_subsystem (void)
		if (ret)
		goto out_file;
		}
		ret = register_reboot_notifier(&css_reboot_notifier);
		if (ret)
		goto out_pseudo;
		css_init_done = 1;

		ctl_set_bit(6, 28);

		for_each_subchannel(__init_channel_subsystem, NULL);
		return 0;
		out_pseudo:
		device_unregister(&channel_subsystems[i]->pseudo_subchannel->dev);
		out_file:
		device_remove_file(&channel_subsystems[i]->device,
		&dev_attr_cm_enable);