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Commit 95ff7cde authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
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Staging: hv: util: Adjust guest time in a process context 



The current code was adjusting guest time in interrupt context; do this
in process context since we may have to initiate cross-processor
interrupts as part of setting time.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent ae2a0b42

drivers/staging/hv/hv_util.c

+30 −3
Original line number Diff line number Diff line
@@ -106,6 +106,24 @@ static inline void do_adj_guesttime(u64 hosttime) 
	do_settimeofday(&host_ts);

}



/*

 * Set the host time in a process context.

 */



struct adj_time_work {

	struct work_struct work;

	u64	host_time;

};



static void hv_set_host_time(struct work_struct *work)

{

	struct adj_time_work	*wrk;



	wrk = container_of(work, struct adj_time_work, work);

	do_adj_guesttime(wrk->host_time);

	kfree(wrk);

}



/*

 * Synchronize time with host after reboot, restore, etc.

 *
@@ -119,17 +137,26 @@ static inline void do_adj_guesttime(u64 hosttime) 
 */

static inline void adj_guesttime(u64 hosttime, u8 flags)

{

	struct adj_time_work    *wrk;

	static s32 scnt = 50;



	wrk = kmalloc(sizeof(struct adj_time_work), GFP_ATOMIC);

	if (wrk == NULL)

		return;



	wrk->host_time = hosttime;

	if ((flags & ICTIMESYNCFLAG_SYNC) != 0) {

		do_adj_guesttime(hosttime);

		INIT_WORK(&wrk->work, hv_set_host_time);

		schedule_work(&wrk->work);

		return;

	}



	if ((flags & ICTIMESYNCFLAG_SAMPLE) != 0 && scnt > 0) {

		scnt--;

		do_adj_guesttime(hosttime);

	}

		INIT_WORK(&wrk->work, hv_set_host_time);

		schedule_work(&wrk->work);

	} else

		kfree(wrk);

}



/*