[S390] more workqueue fixes.

From: Martin Schwidefsky
Date: Fri Dec 08 2006 - 10:19:56 EST

From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>

[S390] more workqueue fixes.

Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
---

drivers/s390/char/tape.h | 3 +-
drivers/s390/char/tape_34xx.c | 23 ++++++++++-----------
drivers/s390/char/tape_3590.c | 7 +++---
drivers/s390/char/tape_block.c | 14 ++++++++-----
drivers/s390/char/tape_core.c | 14 ++++++-------
drivers/s390/cio/css.h | 2 +
drivers/s390/cio/device.c | 43 +++++++++++++++++++++++++----------------
drivers/s390/cio/device.h | 4 +--
drivers/s390/cio/device_fsm.c | 38 +++++++++++++++++++-----------------
drivers/s390/cio/qdio.c | 8 ++++---
10 files changed, 89 insertions(+), 67 deletions(-)

diff -urpN linux-2.6/drivers/s390/char/tape_34xx.c linux-2.6-patched/drivers/s390/char/tape_34xx.c
--- linux-2.6/drivers/s390/char/tape_34xx.c 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/drivers/s390/char/tape_34xx.c 2006-12-08 15:52:44.000000000 +0100
@@ -95,6 +95,12 @@ tape_34xx_medium_sense(struct tape_devic
return rc;
}

+struct tape_34xx_work {
+ struct tape_device *device;
+ enum tape_op op;
+ struct work_struct work;
+};
+
/*
* These functions are currently used only to schedule a medium_sense for
* later execution. This is because we get an interrupt whenever a medium
@@ -103,13 +109,10 @@ tape_34xx_medium_sense(struct tape_devic
* interrupt handler.
*/
static void
-tape_34xx_work_handler(void *data)
+tape_34xx_work_handler(struct work_struct *work)
{
- struct {
- struct tape_device *device;
- enum tape_op op;
- struct work_struct work;
- } *p = data;
+ struct tape_34xx_work *p =
+ container_of(work, struct tape_34xx_work, work);

switch(p->op) {
case TO_MSEN:
@@ -126,17 +129,13 @@ tape_34xx_work_handler(void *data)
static int
tape_34xx_schedule_work(struct tape_device *device, enum tape_op op)
{
- struct {
- struct tape_device *device;
- enum tape_op op;
- struct work_struct work;
- } *p;
+ struct tape_34xx_work *p;

if ((p = kmalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
return -ENOMEM;

memset(p, 0, sizeof(*p));
- INIT_WORK(&p->work, tape_34xx_work_handler, p);
+ INIT_WORK(&p->work, tape_34xx_work_handler);

p->device = tape_get_device_reference(device);
p->op = op;
diff -urpN linux-2.6/drivers/s390/char/tape_3590.c linux-2.6-patched/drivers/s390/char/tape_3590.c
--- linux-2.6/drivers/s390/char/tape_3590.c 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/drivers/s390/char/tape_3590.c 2006-12-08 15:52:44.000000000 +0100
@@ -236,9 +236,10 @@ struct work_handler_data {
};

static void
-tape_3590_work_handler(void *data)
+tape_3590_work_handler(struct work_struct *work)
{
- struct work_handler_data *p = data;
+ struct work_handler_data *p =
+ container_of(work, struct work_handler_data, work);

switch (p->op) {
case TO_MSEN:
@@ -263,7 +264,7 @@ tape_3590_schedule_work(struct tape_devi
if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
return -ENOMEM;

- INIT_WORK(&p->work, tape_3590_work_handler, p);
+ INIT_WORK(&p->work, tape_3590_work_handler);

p->device = tape_get_device_reference(device);
p->op = op;
diff -urpN linux-2.6/drivers/s390/char/tape_block.c linux-2.6-patched/drivers/s390/char/tape_block.c
--- linux-2.6/drivers/s390/char/tape_block.c 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/drivers/s390/char/tape_block.c 2006-12-08 15:52:44.000000000 +0100
@@ -15,6 +15,7 @@
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/buffer_head.h>
+#include <linux/kernel.h>

#include <asm/debug.h>

@@ -143,7 +144,8 @@ tapeblock_start_request(struct tape_devi
* queue.
*/
static void
-tapeblock_requeue(void *data) {
+tapeblock_requeue(struct work_struct *work) {
+ struct tape_blk_data * blkdat;
struct tape_device * device;
request_queue_t * queue;
int nr_queued;
@@ -151,7 +153,8 @@ tapeblock_requeue(void *data) {
struct list_head * l;
int rc;

- device = (struct tape_device *) data;
+ blkdat = container_of(work, struct tape_blk_data, requeue_task);
+ device = blkdat->device;
if (!device)
return;

@@ -212,6 +215,7 @@ tapeblock_setup_device(struct tape_devic
int rc;

blkdat = &device->blk_data;
+ blkdat->device = device;
spin_lock_init(&blkdat->request_queue_lock);
atomic_set(&blkdat->requeue_scheduled, 0);

@@ -255,8 +259,8 @@ tapeblock_setup_device(struct tape_devic

add_disk(disk);

- INIT_WORK(&blkdat->requeue_task, tapeblock_requeue,
- tape_get_device_reference(device));
+ tape_get_device_reference(device);
+ INIT_WORK(&blkdat->requeue_task, tapeblock_requeue);

return 0;

@@ -271,7 +275,7 @@ void
tapeblock_cleanup_device(struct tape_device *device)
{
flush_scheduled_work();
- device->blk_data.requeue_task.data = tape_put_device(device);
+ tape_put_device(device);

if (!device->blk_data.disk) {
PRINT_ERR("(%s): No gendisk to clean up!\n",
diff -urpN linux-2.6/drivers/s390/char/tape_core.c linux-2.6-patched/drivers/s390/char/tape_core.c
--- linux-2.6/drivers/s390/char/tape_core.c 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/drivers/s390/char/tape_core.c 2006-12-08 15:52:44.000000000 +0100
@@ -28,7 +28,7 @@
#define PRINTK_HEADER "TAPE_CORE: "

static void __tape_do_irq (struct ccw_device *, unsigned long, struct irb *);
-static void tape_delayed_next_request(void * data);
+static void tape_delayed_next_request(struct work_struct *);

/*
* One list to contain all tape devices of all disciplines, so
@@ -272,7 +272,7 @@ __tape_cancel_io(struct tape_device *dev
return 0;
case -EBUSY:
request->status = TAPE_REQUEST_CANCEL;
- schedule_work(&device->tape_dnr);
+ schedule_delayed_work(&device->tape_dnr, 0);
return 0;
case -ENODEV:
DBF_EXCEPTION(2, "device gone, retry\n");
@@ -470,7 +470,7 @@ tape_alloc_device(void)
*device->modeset_byte = 0;
device->first_minor = -1;
atomic_set(&device->ref_count, 1);
- INIT_WORK(&device->tape_dnr, tape_delayed_next_request, device);
+ INIT_DELAYED_WORK(&device->tape_dnr, tape_delayed_next_request);

return device;
}
@@ -724,7 +724,7 @@ __tape_start_io(struct tape_device *devi
} else if (rc == -EBUSY) {
/* The common I/O subsystem is currently busy. Retry later. */
request->status = TAPE_REQUEST_QUEUED;
- schedule_work(&device->tape_dnr);
+ schedule_delayed_work(&device->tape_dnr, 0);
rc = 0;
} else {
/* Start failed. Remove request and indicate failure. */
@@ -790,11 +790,11 @@ __tape_start_next_request(struct tape_de
}

static void
-tape_delayed_next_request(void *data)
+tape_delayed_next_request(struct work_struct *work)
{
- struct tape_device * device;
+ struct tape_device *device =
+ container_of(work, struct tape_device, tape_dnr.work);

- device = (struct tape_device *) data;
DBF_LH(6, "tape_delayed_next_request(%p)\n", device);
spin_lock_irq(get_ccwdev_lock(device->cdev));
__tape_start_next_request(device);
diff -urpN linux-2.6/drivers/s390/char/tape.h linux-2.6-patched/drivers/s390/char/tape.h
--- linux-2.6/drivers/s390/char/tape.h 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/drivers/s390/char/tape.h 2006-12-08 15:52:44.000000000 +0100
@@ -179,6 +179,7 @@ struct tape_char_data {
/* Block Frontend Data */
struct tape_blk_data
{
+ struct tape_device * device;
/* Block device request queue. */
request_queue_t * request_queue;
spinlock_t request_queue_lock;
@@ -240,7 +241,7 @@ struct tape_device {
#endif

/* Function to start or stop the next request later. */
- struct work_struct tape_dnr;
+ struct delayed_work tape_dnr;
};

/* Externals from tape_core.c */
diff -urpN linux-2.6/drivers/s390/cio/css.h linux-2.6-patched/drivers/s390/cio/css.h
--- linux-2.6/drivers/s390/cio/css.h 2006-12-08 15:52:24.000000000 +0100
+++ linux-2.6-patched/drivers/s390/cio/css.h 2006-12-08 15:52:44.000000000 +0100
@@ -73,6 +73,8 @@ struct senseid {
} __attribute__ ((packed,aligned(4)));

struct ccw_device_private {
+ struct ccw_device *cdev;
+ struct subchannel *sch;
int state; /* device state */
atomic_t onoff;
unsigned long registered;
diff -urpN linux-2.6/drivers/s390/cio/device.c linux-2.6-patched/drivers/s390/cio/device.c
--- linux-2.6/drivers/s390/cio/device.c 2006-12-08 15:52:24.000000000 +0100
+++ linux-2.6-patched/drivers/s390/cio/device.c 2006-12-08 15:52:44.000000000 +0100
@@ -585,12 +585,13 @@ static struct ccw_device * get_disc_ccwd
}

static void
-ccw_device_add_changed(void *data)
+ccw_device_add_changed(struct work_struct *work)
{
-
+ struct ccw_device_private *priv;
struct ccw_device *cdev;

- cdev = data;
+ priv = container_of(work, struct ccw_device_private, kick_work);
+ cdev = priv->cdev;
if (device_add(&cdev->dev)) {
put_device(&cdev->dev);
return;
@@ -605,13 +606,15 @@ ccw_device_add_changed(void *data)
extern int css_get_ssd_info(struct subchannel *sch);

void
-ccw_device_do_unreg_rereg(void *data)
+ccw_device_do_unreg_rereg(struct work_struct *work)
{
+ struct ccw_device_private *priv;
struct ccw_device *cdev;
struct subchannel *sch;
int need_rename;

- cdev = data;
+ priv = container_of(work, struct ccw_device_private, kick_work);
+ cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
if (cdev->private->dev_id.devno != sch->schib.pmcw.dev) {
/*
@@ -659,7 +662,7 @@ ccw_device_do_unreg_rereg(void *data)
snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x",
sch->schid.ssid, sch->schib.pmcw.dev);
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_add_changed, cdev);
+ ccw_device_add_changed);
queue_work(ccw_device_work, &cdev->private->kick_work);
}

@@ -677,14 +680,16 @@ ccw_device_release(struct device *dev)
* Register recognized device.
*/
static void
-io_subchannel_register(void *data)
+io_subchannel_register(struct work_struct *work)
{
+ struct ccw_device_private *priv;
struct ccw_device *cdev;
struct subchannel *sch;
int ret;
unsigned long flags;

- cdev = data;
+ priv = container_of(work, struct ccw_device_private, kick_work);
+ cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);

/*
@@ -734,11 +739,14 @@ out:
}

void
-ccw_device_call_sch_unregister(void *data)
+ccw_device_call_sch_unregister(struct work_struct *work)
{
- struct ccw_device *cdev = data;
+ struct ccw_device_private *priv;
+ struct ccw_device *cdev;
struct subchannel *sch;

+ priv = container_of(work, struct ccw_device_private, kick_work);
+ cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
@@ -768,7 +776,7 @@ io_subchannel_recog_done(struct ccw_devi
break;
sch = to_subchannel(cdev->dev.parent);
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister, cdev);
+ ccw_device_call_sch_unregister);
queue_work(slow_path_wq, &cdev->private->kick_work);
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
@@ -783,7 +791,7 @@ io_subchannel_recog_done(struct ccw_devi
if (!get_device(&cdev->dev))
break;
PREPARE_WORK(&cdev->private->kick_work,
- io_subchannel_register, cdev);
+ io_subchannel_register);
queue_work(slow_path_wq, &cdev->private->kick_work);
break;
}
@@ -865,6 +873,7 @@ io_subchannel_probe (struct subchannel *
kfree(cdev);
return -ENOMEM;
}
+ cdev->private->cdev = cdev;
atomic_set(&cdev->private->onoff, 0);
cdev->dev.parent = &sch->dev;
cdev->dev.release = ccw_device_release;
@@ -890,12 +899,13 @@ io_subchannel_probe (struct subchannel *
return rc;
}

-static void
-ccw_device_unregister(void *data)
+static void ccw_device_unregister(struct work_struct *work)
{
+ struct ccw_device_private *priv;
struct ccw_device *cdev;

- cdev = (struct ccw_device *)data;
+ priv = container_of(work, struct ccw_device_private, kick_work);
+ cdev = priv->cdev;
if (test_and_clear_bit(1, &cdev->private->registered))
device_unregister(&cdev->dev);
put_device(&cdev->dev);
@@ -921,7 +931,7 @@ io_subchannel_remove (struct subchannel
*/
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_unregister, cdev);
+ ccw_device_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
return 0;
@@ -1048,6 +1058,7 @@ ccw_device_probe_console(void)
memset(&console_cdev, 0, sizeof(struct ccw_device));
memset(&console_private, 0, sizeof(struct ccw_device_private));
console_cdev.private = &console_private;
+ console_private.cdev = &console_cdev;
ret = ccw_device_console_enable(&console_cdev, sch);
if (ret) {
cio_release_console();
diff -urpN linux-2.6/drivers/s390/cio/device_fsm.c linux-2.6-patched/drivers/s390/cio/device_fsm.c
--- linux-2.6/drivers/s390/cio/device_fsm.c 2006-12-08 15:52:24.000000000 +0100
+++ linux-2.6-patched/drivers/s390/cio/device_fsm.c 2006-12-08 15:52:44.000000000 +0100
@@ -194,7 +194,7 @@ ccw_device_handle_oper(struct ccw_device
cdev->id.dev_model != cdev->private->senseid.dev_model ||
cdev->private->dev_id.devno != sch->schib.pmcw.dev) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_do_unreg_rereg, cdev);
+ ccw_device_do_unreg_rereg);
queue_work(ccw_device_work, &cdev->private->kick_work);
return 0;
}
@@ -329,19 +329,21 @@ ccw_device_sense_id_done(struct ccw_devi
}

static void
-ccw_device_oper_notify(void *data)
+ccw_device_oper_notify(struct work_struct *work)
{
+ struct ccw_device_private *priv;
struct ccw_device *cdev;
struct subchannel *sch;
int ret;

- cdev = data;
+ priv = container_of(work, struct ccw_device_private, kick_work);
+ cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
ret = (sch->driver && sch->driver->notify) ?
sch->driver->notify(&sch->dev, CIO_OPER) : 0;
if (!ret)
/* Driver doesn't want device back. */
- ccw_device_do_unreg_rereg(cdev);
+ ccw_device_do_unreg_rereg(work);
else {
/* Reenable channel measurements, if needed. */
cmf_reenable(cdev);
@@ -377,8 +379,7 @@ ccw_device_done(struct ccw_device *cdev,

if (cdev->private->flags.donotify) {
cdev->private->flags.donotify = 0;
- PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify,
- cdev);
+ PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
}
wake_up(&cdev->private->wait_q);
@@ -528,13 +529,15 @@ ccw_device_recog_timeout(struct ccw_devi


static void
-ccw_device_nopath_notify(void *data)
+ccw_device_nopath_notify(struct work_struct *work)
{
+ struct ccw_device_private *priv;
struct ccw_device *cdev;
struct subchannel *sch;
int ret;

- cdev = data;
+ priv = container_of(work, struct ccw_device_private, kick_work);
+ cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
/* Extra sanity. */
if (sch->lpm)
@@ -547,8 +550,7 @@ ccw_device_nopath_notify(void *data)
cio_disable_subchannel(sch);
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister,
- cdev);
+ ccw_device_call_sch_unregister);
queue_work(ccw_device_work,
&cdev->private->kick_work);
} else
@@ -607,7 +609,7 @@ ccw_device_verify_done(struct ccw_device
/* Reset oper notify indication after verify error. */
cdev->private->flags.donotify = 0;
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
ccw_device_done(cdev, DEV_STATE_NOT_OPER);
break;
@@ -738,7 +740,7 @@ ccw_device_offline_notoper(struct ccw_de
sch = to_subchannel(cdev->dev.parent);
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister, cdev);
+ ccw_device_call_sch_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
wake_up(&cdev->private->wait_q);
@@ -769,7 +771,7 @@ ccw_device_online_notoper(struct ccw_dev
}
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister, cdev);
+ ccw_device_call_sch_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
wake_up(&cdev->private->wait_q);
@@ -874,7 +876,7 @@ ccw_device_online_timeout(struct ccw_dev
sch = to_subchannel(cdev->dev.parent);
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work,
&cdev->private->kick_work);
} else
@@ -969,7 +971,7 @@ ccw_device_killing_irq(struct ccw_device
ERR_PTR(-EIO));
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
} else if (cdev->private->flags.doverify)
/* Start delayed path verification. */
@@ -992,7 +994,7 @@ ccw_device_killing_timeout(struct ccw_de
sch = to_subchannel(cdev->dev.parent);
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work,
&cdev->private->kick_work);
} else
@@ -1021,7 +1023,7 @@ void device_kill_io(struct subchannel *s
if (ret == -ENODEV) {
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work,
&cdev->private->kick_work);
} else
@@ -1033,7 +1035,7 @@ void device_kill_io(struct subchannel *s
ERR_PTR(-EIO));
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
} else
/* Start delayed path verification. */
diff -urpN linux-2.6/drivers/s390/cio/device.h linux-2.6-patched/drivers/s390/cio/device.h
--- linux-2.6/drivers/s390/cio/device.h 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/drivers/s390/cio/device.h 2006-12-08 15:52:44.000000000 +0100
@@ -78,8 +78,8 @@ void io_subchannel_recog_done(struct ccw

int ccw_device_cancel_halt_clear(struct ccw_device *);

-void ccw_device_do_unreg_rereg(void *);
-void ccw_device_call_sch_unregister(void *);
+void ccw_device_do_unreg_rereg(struct work_struct *);
+void ccw_device_call_sch_unregister(struct work_struct *);

int ccw_device_recognition(struct ccw_device *);
int ccw_device_online(struct ccw_device *);
diff -urpN linux-2.6/drivers/s390/cio/qdio.c linux-2.6-patched/drivers/s390/cio/qdio.c
--- linux-2.6/drivers/s390/cio/qdio.c 2006-12-08 15:52:24.000000000 +0100
+++ linux-2.6-patched/drivers/s390/cio/qdio.c 2006-12-08 15:52:44.000000000 +0100
@@ -2045,11 +2045,13 @@ omit_handler_call:
}

static void
-qdio_call_shutdown(void *data)
+qdio_call_shutdown(struct work_struct *work)
{
+ struct ccw_device_private *priv;
struct ccw_device *cdev;

- cdev = (struct ccw_device *)data;
+ priv = container_of(work, struct ccw_device_private, kick_work);
+ cdev = priv->cdev;
qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
put_device(&cdev->dev);
}
@@ -2091,7 +2093,7 @@ qdio_timeout_handler(struct ccw_device *
if (get_device(&cdev->dev)) {
/* Can't call shutdown from interrupt context. */
PREPARE_WORK(&cdev->private->kick_work,
- qdio_call_shutdown, (void *)cdev);
+ qdio_call_shutdown);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
break;
-
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