Commit 62da177a authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

[S390] css: update descriptor after hibernate 



Update the channel path descriptors after hibernation.
This is done unlocked, since we are the only active
task at this time.

Note: chsc_determine_base_channel_path_desc is changed
to use spin_lock_irqsave, since it's called with
interrupts disabled in this case.

Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent c38a90a3

drivers/s390/cio/chsc.c

+3 −2
Original line number Diff line number Diff line
@@ -680,9 +680,10 @@ int chsc_determine_base_channel_path_desc(struct chp_id chpid, 
{

	struct chsc_response_struct *chsc_resp;

	struct chsc_scpd *scpd_area;

	unsigned long flags;

	int ret;



	spin_lock_irq(&chsc_page_lock);

	spin_lock_irqsave(&chsc_page_lock, flags);

	scpd_area = chsc_page;

	ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area);

	if (ret)
@@ -690,7 +691,7 @@ int chsc_determine_base_channel_path_desc(struct chp_id chpid, 
	chsc_resp = (void *)&scpd_area->response;

	memcpy(desc, &chsc_resp->data, sizeof(*desc));

out:

	spin_unlock_irq(&chsc_page_lock);

	spin_unlock_irqrestore(&chsc_page_lock, flags);

	return ret;

}

drivers/s390/cio/css.c

+9 −0
Original line number Diff line number Diff line
@@ -1030,7 +1030,16 @@ subsys_initcall_sync(channel_subsystem_init_sync); 


void channel_subsystem_reinit(void)

{

	struct channel_path *chp;

	struct chp_id chpid;



	chsc_enable_facility(CHSC_SDA_OC_MSS);

	chp_id_for_each(&chpid) {

		chp = chpid_to_chp(chpid);

		if (!chp)

			continue;

		chsc_determine_base_channel_path_desc(chpid, &chp->desc);

	}

}



#ifdef CONFIG_PROC_FS

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