Commit 188561a4 authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

s390/cio: wait_cons_dev don't use static variable 



wait_cons_dev is used to busy wait for an interrupt on the console
ccw device. Stop using the static console_subchannel and add a
parameter to this function to specify on which ccw device/subchannel
we have to do the polling.

While at it rename the function to ccw_device_wait_idle and
move it to device.c

Reviewed-by: default avatarPeter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 91c15a95

arch/s390/include/asm/ccwdev.h

+1 −0
Original line number Diff line number Diff line
@@ -220,6 +220,7 @@ extern void ccw_device_get_id(struct ccw_device *, struct ccw_dev_id *); 
#define to_ccwdrv(n) container_of(n, struct ccw_driver, driver)



extern struct ccw_device *ccw_device_probe_console(void);

extern void ccw_device_wait_idle(struct ccw_device *);

extern int ccw_device_force_console(void);



int ccw_device_siosl(struct ccw_device *);

arch/s390/include/asm/cio.h

+0 −2
Original line number Diff line number Diff line
@@ -296,8 +296,6 @@ static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1, 
	return 0;

}



extern void wait_cons_dev(void);



extern void css_schedule_reprobe(void);



extern void reipl_ccw_dev(struct ccw_dev_id *id);

drivers/s390/char/con3215.c

+1 −1
Original line number Diff line number Diff line
@@ -502,7 +502,7 @@ static void raw3215_make_room(struct raw3215_info *raw, unsigned int length) 
		raw3215_try_io(raw);

		raw->flags &= ~RAW3215_FLUSHING;

#ifdef CONFIG_TN3215_CONSOLE

		wait_cons_dev();

		ccw_device_wait_idle(raw->cdev);

#endif

		/* Enough room freed up ? */

		if (RAW3215_BUFFER_SIZE - raw->count >= length)

drivers/s390/char/raw3270.c

+2 −2
Original line number Diff line number Diff line
@@ -796,7 +796,7 @@ struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) 
	do {

		__raw3270_reset_device(rp);

		while (!raw3270_state_final(rp)) {

			wait_cons_dev();

			ccw_device_wait_idle(rp->cdev);

			barrier();

		}

	} while (rp->state != RAW3270_STATE_READY);
@@ -810,7 +810,7 @@ raw3270_wait_cons_dev(struct raw3270 *rp) 
	unsigned long flags;



	spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);

	wait_cons_dev();

	ccw_device_wait_idle(rp->cdev);

	spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);

}

drivers/s390/cio/cio.c

+2 −18
Original line number Diff line number Diff line
@@ -656,9 +656,9 @@ static int console_subchannel_in_use; 


/*

 * Use cio_tsch to update the subchannel status and call the interrupt handler

 * if status had been pending. Called with the console_subchannel lock.

 * if status had been pending. Called with the subchannel's lock held.

 */

static void cio_tsch(struct subchannel *sch)

void cio_tsch(struct subchannel *sch)

{

	struct irb *irb;

	int irq_context;
@@ -690,22 +690,6 @@ void *cio_get_console_priv(void) 
	return &console_priv;

}



/*

 * busy wait for the next interrupt on the console

 */

void wait_cons_dev(void)

{

	if (!console_subchannel_in_use)

		return;



	while (1) {

		cio_tsch(&console_subchannel);

		if (console_subchannel.schib.scsw.cmd.actl == 0)

			break;

		udelay_simple(100);

	}

}



static int

cio_test_for_console(struct subchannel_id schid, void *data)

{

CRA Git | Maintained and supported by SUSTech CRA and CCSE