Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

Conflicts:

	drivers/ata/libata-scsi.c
	include/linux/libata.h

Futher merge of Linus's head and compilation fixups.

Signed-Off-By: David Howells <dhowells@redhat.com>

19 files changed, 350 insertions, 222 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 79ffef6bfaf..a2cef57d7bc 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1264,15 +1264,21 @@ __dasd_check_expire(struct dasd_device * device)
 	if (list_empty(&device->ccw_queue))
 		return;
 	cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list);
-	if (cqr->status == DASD_CQR_IN_IO && cqr->expires != 0) {
-		if (time_after_eq(jiffies, cqr->expires + cqr->starttime)) {
+	if ((cqr->status == DASD_CQR_IN_IO && cqr->expires != 0) &&
+	    (time_after_eq(jiffies, cqr->expires + cqr->starttime))) {
+		if (device->discipline->term_IO(cqr) != 0) {
+			/* Hmpf, try again in 5 sec */
+			dasd_set_timer(device, 5*HZ);
+			DEV_MESSAGE(KERN_ERR, device,
+				    "internal error - timeout (%is) expired "
+				    "for cqr %p, termination failed, "
+				    "retrying in 5s",
+				    (cqr->expires/HZ), cqr);
+		} else {
 			DEV_MESSAGE(KERN_ERR, device,
 				    "internal error - timeout (%is) expired "
 				    "for cqr %p (%i retries left)",
 				    (cqr->expires/HZ), cqr, cqr->retries);
-			if (device->discipline->term_IO(cqr) != 0)
-				/* Hmpf, try again in 1/10 sec */
-				dasd_set_timer(device, 10);
 		}
 	}
 }
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 91cf971f065..17fdd8c9f74 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -684,21 +684,26 @@ dasd_ro_store(struct device *dev, struct device_attribute *attr,
 	      const char *buf, size_t count)
 {
 	struct dasd_devmap *devmap;
-	int ro_flag;
+	int val;
+	char *endp;
 
 	devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
 	if (IS_ERR(devmap))
 		return PTR_ERR(devmap);
-	ro_flag = buf[0] == '1';
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (((endp + 1) < (buf + count)) || (val > 1))
+		return -EINVAL;
+
 	spin_lock(&dasd_devmap_lock);
-	if (ro_flag)
+	if (val)
 		devmap->features |= DASD_FEATURE_READONLY;
 	else
 		devmap->features &= ~DASD_FEATURE_READONLY;
 	if (devmap->device)
 		devmap->device->features = devmap->features;
 	if (devmap->device && devmap->device->gdp)
-		set_disk_ro(devmap->device->gdp, ro_flag);
+		set_disk_ro(devmap->device->gdp, val);
 	spin_unlock(&dasd_devmap_lock);
 	return count;
 }
@@ -729,17 +734,22 @@ dasd_use_diag_store(struct device *dev, struct device_attribute *attr,
 {
 	struct dasd_devmap *devmap;
 	ssize_t rc;
-	int use_diag;
+	int val;
+	char *endp;
 
 	devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
 	if (IS_ERR(devmap))
 		return PTR_ERR(devmap);
-	use_diag = buf[0] == '1';
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (((endp + 1) < (buf + count)) || (val > 1))
+		return -EINVAL;
+
 	spin_lock(&dasd_devmap_lock);
 	/* Changing diag discipline flag is only allowed in offline state. */
 	rc = count;
 	if (!devmap->device) {
-		if (use_diag)
+		if (val)
 			devmap->features |= DASD_FEATURE_USEDIAG;
 		else
 			devmap->features &= ~DASD_FEATURE_USEDIAG;
@@ -854,14 +864,20 @@ dasd_eer_store(struct device *dev, struct device_attribute *attr,
 	       const char *buf, size_t count)
 {
 	struct dasd_devmap *devmap;
-	int rc;
+	int val, rc;
+	char *endp;
 
 	devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
 	if (IS_ERR(devmap))
 		return PTR_ERR(devmap);
 	if (!devmap->device)
-		return count;
-	if (buf[0] == '1') {
+		return -ENODEV;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (((endp + 1) < (buf + count)) || (val > 1))
+		return -EINVAL;
+
+	if (val) {
 		rc = dasd_eer_enable(devmap->device);
 		if (rc)
 			return rc;
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index d7de175d53f..c9321b920e9 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -299,14 +299,14 @@ raw3215_timeout(unsigned long __data)
 	struct raw3215_info *raw = (struct raw3215_info *) __data;
 	unsigned long flags;
 
-	spin_lock_irqsave(raw->lock, flags);
+	spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 	if (raw->flags & RAW3215_TIMER_RUNS) {
 		del_timer(&raw->timer);
 		raw->flags &= ~RAW3215_TIMER_RUNS;
 		raw3215_mk_write_req(raw);
 		raw3215_start_io(raw);
 	}
-	spin_unlock_irqrestore(raw->lock, flags);
+	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 }
 
 /*
@@ -355,10 +355,10 @@ raw3215_tasklet(void *data)
 	unsigned long flags;
 
 	raw = (struct raw3215_info *) data;
-	spin_lock_irqsave(raw->lock, flags);
+	spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 	raw3215_mk_write_req(raw);
 	raw3215_try_io(raw);
-	spin_unlock_irqrestore(raw->lock, flags);
+	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 	/* Check for pending message from raw3215_irq */
 	if (raw->message != NULL) {
 		printk(raw->message, raw->msg_dstat, raw->msg_cstat);
@@ -512,9 +512,9 @@ raw3215_make_room(struct raw3215_info *raw, unsigned int length)
 		if (RAW3215_BUFFER_SIZE - raw->count >= length)
 			break;
 		/* there might be another cpu waiting for the lock */
-		spin_unlock(raw->lock);
+		spin_unlock(get_ccwdev_lock(raw->cdev));
 		udelay(100);
-		spin_lock(raw->lock);
+		spin_lock(get_ccwdev_lock(raw->cdev));
 	}
 }
 
@@ -528,7 +528,7 @@ raw3215_write(struct raw3215_info *raw, const char *str, unsigned int length)
 	int c, count;
 
 	while (length > 0) {
-		spin_lock_irqsave(raw->lock, flags);
+		spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 		count = (length > RAW3215_BUFFER_SIZE) ?
 					     RAW3215_BUFFER_SIZE : length;
 		length -= count;
@@ -555,7 +555,7 @@ raw3215_write(struct raw3215_info *raw, const char *str, unsigned int length)
 			/* start or queue request */
 			raw3215_try_io(raw);
 		}
-		spin_unlock_irqrestore(raw->lock, flags);
+		spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 	}
 }
 
@@ -568,7 +568,7 @@ raw3215_putchar(struct raw3215_info *raw, unsigned char ch)
 	unsigned long flags;
 	unsigned int length, i;
 
-	spin_lock_irqsave(raw->lock, flags);
+	spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 	if (ch == '\t') {
 		length = TAB_STOP_SIZE - (raw->line_pos%TAB_STOP_SIZE);
 		raw->line_pos += length;
@@ -592,7 +592,7 @@ raw3215_putchar(struct raw3215_info *raw, unsigned char ch)
 		/* start or queue request */
 		raw3215_try_io(raw);
 	}
-	spin_unlock_irqrestore(raw->lock, flags);
+	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 }
 
 /*
@@ -604,13 +604,13 @@ raw3215_flush_buffer(struct raw3215_info *raw)
 {
 	unsigned long flags;
 
-	spin_lock_irqsave(raw->lock, flags);
+	spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 	if (raw->count > 0) {
 		raw->flags |= RAW3215_FLUSHING;
 		raw3215_try_io(raw);
 		raw->flags &= ~RAW3215_FLUSHING;
 	}
-	spin_unlock_irqrestore(raw->lock, flags);
+	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 }
 
 /*
@@ -625,9 +625,9 @@ raw3215_startup(struct raw3215_info *raw)
 		return 0;
 	raw->line_pos = 0;
 	raw->flags |= RAW3215_ACTIVE;
-	spin_lock_irqsave(raw->lock, flags);
+	spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 	raw3215_try_io(raw);
-	spin_unlock_irqrestore(raw->lock, flags);
+	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 
 	return 0;
 }
@@ -644,21 +644,21 @@ raw3215_shutdown(struct raw3215_info *raw)
 	if (!(raw->flags & RAW3215_ACTIVE) || (raw->flags & RAW3215_FIXED))
 		return;
 	/* Wait for outstanding requests, then free irq */
-	spin_lock_irqsave(raw->lock, flags);
+	spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 	if ((raw->flags & RAW3215_WORKING) ||
 	    raw->queued_write != NULL ||
 	    raw->queued_read != NULL) {
 		raw->flags |= RAW3215_CLOSING;
 		add_wait_queue(&raw->empty_wait, &wait);
 		set_current_state(TASK_INTERRUPTIBLE);
-		spin_unlock_irqrestore(raw->lock, flags);
+		spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 		schedule();
-		spin_lock_irqsave(raw->lock, flags);
+		spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 		remove_wait_queue(&raw->empty_wait, &wait);
 		set_current_state(TASK_RUNNING);
 		raw->flags &= ~(RAW3215_ACTIVE | RAW3215_CLOSING);
 	}
-	spin_unlock_irqrestore(raw->lock, flags);
+	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 }
 
 static int
@@ -686,7 +686,6 @@ raw3215_probe (struct ccw_device *cdev)
 	}
 
 	raw->cdev = cdev;
-	raw->lock = get_ccwdev_lock(cdev);
 	raw->inbuf = (char *) raw + sizeof(struct raw3215_info);
 	memset(raw, 0, sizeof(struct raw3215_info));
 	raw->buffer = (char *) kmalloc(RAW3215_BUFFER_SIZE,
@@ -809,9 +808,9 @@ con3215_unblank(void)
 	unsigned long flags;
 
 	raw = raw3215[0];  /* console 3215 is the first one */
-	spin_lock_irqsave(raw->lock, flags);
+	spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 	raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
-	spin_unlock_irqrestore(raw->lock, flags);
+	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 }
 
 static int __init 
@@ -873,7 +872,6 @@ con3215_init(void)
 	raw->buffer = (char *) alloc_bootmem_low(RAW3215_BUFFER_SIZE);
 	raw->inbuf = (char *) alloc_bootmem_low(RAW3215_INBUF_SIZE);
 	raw->cdev = cdev;
-	raw->lock = get_ccwdev_lock(cdev);
 	cdev->dev.driver_data = raw;
 	cdev->handler = raw3215_irq;
 
@@ -1066,10 +1064,10 @@ tty3215_unthrottle(struct tty_struct * tty)
 
 	raw = (struct raw3215_info *) tty->driver_data;
 	if (raw->flags & RAW3215_THROTTLED) {
-		spin_lock_irqsave(raw->lock, flags);
+		spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 		raw->flags &= ~RAW3215_THROTTLED;
 		raw3215_try_io(raw);
-		spin_unlock_irqrestore(raw->lock, flags);
+		spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 	}
 }
 
@@ -1096,10 +1094,10 @@ tty3215_start(struct tty_struct *tty)
 
 	raw = (struct raw3215_info *) tty->driver_data;
 	if (raw->flags & RAW3215_STOPPED) {
-		spin_lock_irqsave(raw->lock, flags);
+		spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 		raw->flags &= ~RAW3215_STOPPED;
 		raw3215_try_io(raw);
-		spin_unlock_irqrestore(raw->lock, flags);
+		spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 	}
 }
 
diff --git a/drivers/s390/char/sclp_quiesce.c b/drivers/s390/char/sclp_quiesce.c
index 32004aae95c..ffa9282ce97 100644
--- a/drivers/s390/char/sclp_quiesce.c
+++ b/drivers/s390/char/sclp_quiesce.c
@@ -19,52 +19,17 @@
 
 #include "sclp.h"
 
-
-#ifdef CONFIG_SMP
-/* Signal completion of shutdown process. All CPUs except the first to enter
- * this function: go to stopped state. First CPU: wait until all other
- * CPUs are in stopped or check stop state. Afterwards, load special PSW
- * to indicate completion. */
-static void
-do_load_quiesce_psw(void * __unused)
-{
-	static atomic_t cpuid = ATOMIC_INIT(-1);
-	psw_t quiesce_psw;
-	int cpu;
-
-	if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) != -1)
-		signal_processor(smp_processor_id(), sigp_stop);
-	/* Wait for all other cpus to enter stopped state */
-	for_each_online_cpu(cpu) {
-		if (cpu == smp_processor_id())
-			continue;
-		while(!smp_cpu_not_running(cpu))
-			cpu_relax();
-	}
-	/* Quiesce the last cpu with the special psw */
-	quiesce_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT;
-	quiesce_psw.addr = 0xfff;
-	__load_psw(quiesce_psw);
-}
-
-/* Shutdown handler. Perform shutdown function on all CPUs. */
-static void
-do_machine_quiesce(void)
-{
-	on_each_cpu(do_load_quiesce_psw, NULL, 0, 0);
-}
-#else
 /* Shutdown handler. Signal completion of shutdown by loading special PSW. */
 static void
 do_machine_quiesce(void)
 {
 	psw_t quiesce_psw;
 
+	smp_send_stop();
 	quiesce_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT;
 	quiesce_psw.addr = 0xfff;
 	__load_psw(quiesce_psw);
 }
-#endif
 
 /* Handler for quiesce event. Start shutdown procedure. */
 static void
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 2d78f0f4a40..dbfb77b0392 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -251,6 +251,8 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
 		cc = cio_clear(sch);
 		if (cc == -ENODEV)
 			goto out_unreg;
+		/* Request retry of internal operation. */
+		device_set_intretry(sch);
 		/* Call handler. */
 		if (sch->driver && sch->driver->termination)
 			sch->driver->termination(&sch->dev);
@@ -711,9 +713,6 @@ static inline int check_for_io_on_path(struct subchannel *sch, int index)
 {
 	int cc;
 
-	if (!device_is_online(sch))
-		/* cio could be doing I/O. */
-		return 0;
 	cc = stsch(sch->schid, &sch->schib);
 	if (cc)
 		return 0;
@@ -722,6 +721,26 @@ static inline int check_for_io_on_path(struct subchannel *sch, int index)
 	return 0;
 }
 
+static void terminate_internal_io(struct subchannel *sch)
+{
+	if (cio_clear(sch)) {
+		/* Recheck device in case clear failed. */
+		sch->lpm = 0;
+		if (device_trigger_verify(sch) != 0) {
+			if(css_enqueue_subchannel_slow(sch->schid)) {
+				css_clear_subchannel_slow_list();
+				need_rescan = 1;
+			}
+		}
+		return;
+	}
+	/* Request retry of internal operation. */
+	device_set_intretry(sch);
+	/* Call handler. */
+	if (sch->driver && sch->driver->termination)
+		sch->driver->termination(&sch->dev);
+}
+
 static inline void
 __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
 {
@@ -744,20 +763,26 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
 				device_trigger_reprobe(sch);
 			else if (sch->driver && sch->driver->verify)
 				sch->driver->verify(&sch->dev);
-		} else {
-			sch->opm &= ~(0x80 >> chp);
-			sch->lpm &= ~(0x80 >> chp);
-			if (check_for_io_on_path(sch, chp))
+			break;
+		}
+		sch->opm &= ~(0x80 >> chp);
+		sch->lpm &= ~(0x80 >> chp);
+		if (check_for_io_on_path(sch, chp)) {
+			if (device_is_online(sch))
 				/* Path verification is done after killing. */
 				device_kill_io(sch);
-			else if (!sch->lpm) {
+			else
+				/* Kill and retry internal I/O. */
+				terminate_internal_io(sch);
+		} else if (!sch->lpm) {
+			if (device_trigger_verify(sch) != 0) {
 				if (css_enqueue_subchannel_slow(sch->schid)) {
 					css_clear_subchannel_slow_list();
 					need_rescan = 1;
 				}
-			} else if (sch->driver && sch->driver->verify)
-				sch->driver->verify(&sch->dev);
-		}
+			}
+		} else if (sch->driver && sch->driver->verify)
+			sch->driver->verify(&sch->dev);
 		break;
 	}
 	spin_unlock_irqrestore(&sch->lock, flags);
@@ -1465,41 +1490,6 @@ chsc_get_chp_desc(struct subchannel *sch, int chp_no)
 	return desc;
 }
 
-static int reset_channel_path(struct channel_path *chp)
-{
-	int cc;
-
-	cc = rchp(chp->id);
-	switch (cc) {
-	case 0:
-		return 0;
-	case 2:
-		return -EBUSY;
-	default:
-		return -ENODEV;
-	}
-}
-
-static void reset_channel_paths_css(struct channel_subsystem *css)
-{
-	int i;
-
-	for (i = 0; i <= __MAX_CHPID; i++) {
-		if (css->chps[i])
-			reset_channel_path(css->chps[i]);
-	}
-}
-
-void cio_reset_channel_paths(void)
-{
-	int i;
-
-	for (i = 0; i <= __MAX_CSSID; i++) {
-		if (css[i] && css[i]->valid)
-			reset_channel_paths_css(css[i]);
-	}
-}
-
 static int __init
 chsc_alloc_sei_area(void)
 {
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 8936e460a80..20aee278384 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -21,6 +21,7 @@
 #include <asm/irq.h>
 #include <asm/irq_regs.h>
 #include <asm/setup.h>
+#include <asm/reset.h>
 #include "airq.h"
 #include "cio.h"
 #include "css.h"
@@ -28,6 +29,7 @@
 #include "ioasm.h"
 #include "blacklist.h"
 #include "cio_debug.h"
+#include "../s390mach.h"
 
 debug_info_t *cio_debug_msg_id;
 debug_info_t *cio_debug_trace_id;
@@ -841,26 +843,12 @@ __clear_subchannel_easy(struct subchannel_id schid)
 	return -EBUSY;
 }
 
-struct sch_match_id {
-	struct subchannel_id schid;
-	struct ccw_dev_id devid;
-	int rc;
-};
-
-static int __shutdown_subchannel_easy_and_match(struct subchannel_id schid,
-	void *data)
+static int __shutdown_subchannel_easy(struct subchannel_id schid, void *data)
 {
 	struct schib schib;
-	struct sch_match_id *match_id = data;
 
 	if (stsch_err(schid, &schib))
 		return -ENXIO;
-	if (match_id && schib.pmcw.dnv &&
-		(schib.pmcw.dev == match_id->devid.devno) &&
-		(schid.ssid == match_id->devid.ssid)) {
-		match_id->schid = schid;
-		match_id->rc = 0;
-	}
 	if (!schib.pmcw.ena)
 		return 0;
 	switch(__disable_subchannel_easy(schid, &schib)) {
@@ -876,27 +864,111 @@ static int __shutdown_subchannel_easy_and_match(struct subchannel_id schid,
 	return 0;
 }
 
-static int clear_all_subchannels_and_match(struct ccw_dev_id *devid,
-	struct subchannel_id *schid)
+static atomic_t chpid_reset_count;
+
+static void s390_reset_chpids_mcck_handler(void)
+{
+	struct crw crw;
+	struct mci *mci;
+
+	/* Check for pending channel report word. */
+	mci = (struct mci *)&S390_lowcore.mcck_interruption_code;
+	if (!mci->cp)
+		return;
+	/* Process channel report words. */
+	while (stcrw(&crw) == 0) {
+		/* Check for responses to RCHP. */
+		if (crw.slct && crw.rsc == CRW_RSC_CPATH)
+			atomic_dec(&chpid_reset_count);
+	}
+}
+
+#define RCHP_TIMEOUT (30 * USEC_PER_SEC)
+static void css_reset(void)
+{
+	int i, ret;
+	unsigned long long timeout;
+
+	/* Reset subchannels. */
+	for_each_subchannel(__shutdown_subchannel_easy,  NULL);
+	/* Reset channel paths. */
+	s390_reset_mcck_handler = s390_reset_chpids_mcck_handler;
+	/* Enable channel report machine checks. */
+	__ctl_set_bit(14, 28);
+	/* Temporarily reenable machine checks. */
+	local_mcck_enable();
+	for (i = 0; i <= __MAX_CHPID; i++) {
+		ret = rchp(i);
+		if ((ret == 0) || (ret == 2))
+			/*
+			 * rchp either succeeded, or another rchp is already
+			 * in progress. In either case, we'll get a crw.
+			 */
+			atomic_inc(&chpid_reset_count);
+	}
+	/* Wait for machine check for all channel paths. */
+	timeout = get_clock() + (RCHP_TIMEOUT << 12);
+	while (atomic_read(&chpid_reset_count) != 0) {
+		if (get_clock() > timeout)
+			break;
+		cpu_relax();
+	}
+	/* Disable machine checks again. */
+	local_mcck_disable();
+	/* Disable channel report machine checks. */
+	__ctl_clear_bit(14, 28);
+	s390_reset_mcck_handler = NULL;
+}
+
+static struct reset_call css_reset_call = {
+	.fn = css_reset,
+};
+
+static int __init init_css_reset_call(void)
+{
+	atomic_set(&chpid_reset_count, 0);
+	register_reset_call(&css_reset_call);
+	return 0;
+}
+
+arch_initcall(init_css_reset_call);
+
+struct sch_match_id {
+	struct subchannel_id schid;
+	struct ccw_dev_id devid;
+	int rc;
+};
+
+static int __reipl_subchannel_match(struct subchannel_id schid, void *data)
+{
+	struct schib schib;
+	struct sch_match_id *match_id = data;
+
+	if (stsch_err(schid, &schib))
+		return -ENXIO;
+	if (schib.pmcw.dnv &&
+	    (schib.pmcw.dev == match_id->devid.devno) &&
+	    (schid.ssid == match_id->devid.ssid)) {
+		match_id->schid = schid;
+		match_id->rc = 0;
+		return 1;
+	}
+	return 0;
+}
+
+static int reipl_find_schid(struct ccw_dev_id *devid,
+			    struct subchannel_id *schid)
 {
 	struct sch_match_id match_id;
 
 	match_id.devid = *devid;
 	match_id.rc = -ENODEV;
-	local_irq_disable();
-	for_each_subchannel(__shutdown_subchannel_easy_and_match, &match_id);
+	for_each_subchannel(__reipl_subchannel_match, &match_id);
 	if (match_id.rc == 0)
 		*schid = match_id.schid;
 	return match_id.rc;
 }
 
-
-void clear_all_subchannels(void)
-{
-	local_irq_disable();
-	for_each_subchannel(__shutdown_subchannel_easy_and_match, NULL);
-}
-
 extern void do_reipl_asm(__u32 schid);
 
 /* Make sure all subchannels are quiet before we re-ipl an lpar. */
@@ -904,9 +976,9 @@ void reipl_ccw_dev(struct ccw_dev_id *devid)
 {
 	struct subchannel_id schid;
 
-	if (clear_all_subchannels_and_match(devid, &schid))
+	s390_reset_system();
+	if (reipl_find_schid(devid, &schid) != 0)
 		panic("IPL Device not found\n");
-	cio_reset_channel_paths();
 	do_reipl_asm(*((__u32*)&schid));
 }
 
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 4c2ff833628..9ff064e7176 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -94,6 +94,7 @@ struct ccw_device_private {
 		unsigned int donotify:1;    /* call notify function */
 		unsigned int recog_done:1;  /* dev. recog. complete */
 		unsigned int fake_irb:1;    /* deliver faked irb */
+		unsigned int intretry:1;    /* retry internal operation */
 	} __attribute__((packed)) flags;
 	unsigned long intparm;	/* user interruption parameter */
 	struct qdio_irq *qdio_data;
@@ -171,6 +172,8 @@ void device_trigger_reprobe(struct subchannel *);
 /* Helper functions for vary on/off. */
 int device_is_online(struct subchannel *);
 void device_kill_io(struct subchannel *);
+void device_set_intretry(struct subchannel *sch);
+int device_trigger_verify(struct subchannel *sch);
 
 /* Machine check helper function. */
 void device_kill_pending_timer(struct subchannel *);
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 39c98f94050..d3d3716ff84 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -687,8 +687,20 @@ io_subchannel_register(void *data)
 	cdev = data;
 	sch = to_subchannel(cdev->dev.parent);
 
+	/*
+	 * io_subchannel_register() will also be called after device
+	 * recognition has been done for a boxed device (which will already
+	 * be registered). We need to reprobe since we may now have sense id
+	 * information.
+	 */
 	if (klist_node_attached(&cdev->dev.knode_parent)) {
-		bus_rescan_devices(&ccw_bus_type);
+		if (!cdev->drv) {
+			ret = device_reprobe(&cdev->dev);
+			if (ret)
+				/* We can't do much here. */
+				dev_info(&cdev->dev, "device_reprobe() returned"
+					 " %d\n", ret);
+		}
 		goto out;
 	}
 	/* make it known to the system */
@@ -948,6 +960,9 @@ io_subchannel_ioterm(struct device *dev)
 	cdev = dev->driver_data;
 	if (!cdev)
 		return;
+	/* Internal I/O will be retried by the interrupt handler. */
+	if (cdev->private->flags.intretry)
+		return;
 	cdev->private->state = DEV_STATE_CLEAR_VERIFY;
 	if (cdev->handler)
 		cdev->handler(cdev, cdev->private->intparm,
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index de3d0857db9..09c7672eb3f 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -59,6 +59,27 @@ device_set_disconnected(struct subchannel *sch)
 	cdev->private->state = DEV_STATE_DISCONNECTED;
 }
 
+void device_set_intretry(struct subchannel *sch)
+{
+	struct ccw_device *cdev;
+
+	cdev = sch->dev.driver_data;
+	if (!cdev)
+		return;
+	cdev->private->flags.intretry = 1;
+}
+
+int device_trigger_verify(struct subchannel *sch)
+{
+	struct ccw_device *cdev;
+
+	cdev = sch->dev.driver_data;
+	if (!cdev || !cdev->online)
+		return -EINVAL;
+	dev_fsm_event(cdev, DEV_EVENT_VERIFY);
+	return 0;
+}
+
 /*
  * Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
  */
@@ -893,6 +914,12 @@ ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
 	 * had killed the original request.
 	 */
 	if (irb->scsw.fctl & (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
+		/* Retry Basic Sense if requested. */
+		if (cdev->private->flags.intretry) {
+			cdev->private->flags.intretry = 0;
+			ccw_device_do_sense(cdev, irb);
+			return;
+		}
 		cdev->private->flags.dosense = 0;
 		memset(&cdev->private->irb, 0, sizeof(struct irb));
 		ccw_device_accumulate_irb(cdev, irb);
diff --git a/drivers/s390/cio/device_id.c b/drivers/s390/cio/device_id.c
index a74785b9e4e..f17275917fe 100644
--- a/drivers/s390/cio/device_id.c
+++ b/drivers/s390/cio/device_id.c
@@ -191,6 +191,8 @@ __ccw_device_sense_id_start(struct ccw_device *cdev)
 		if ((sch->opm & cdev->private->imask) != 0 &&
 		    cdev->private->iretry > 0) {
 			cdev->private->iretry--;
+			/* Reset internal retry indication. */
+			cdev->private->flags.intretry = 0;
 			ret = cio_start (sch, cdev->private->iccws,
 					 cdev->private->imask);
 			/* ret is 0, -EBUSY, -EACCES or -ENODEV */
@@ -237,8 +239,14 @@ ccw_device_check_sense_id(struct ccw_device *cdev)
 		return 0; /* Success */
 	}
 	/* Check the error cases. */
-	if (irb->scsw.fctl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC))
+	if (irb->scsw.fctl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC)) {
+		/* Retry Sense ID if requested. */
+		if (cdev->private->flags.intretry) {
+			cdev->private->flags.intretry = 0;
+			return -EAGAIN;
+		}
 		return -ETIME;
+	}
 	if (irb->esw.esw0.erw.cons && (irb->ecw[0] & SNS0_CMD_REJECT)) {
 		/*
 		 * if the device doesn't support the SenseID
diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c
index 2975ce888c1..cb1879a9681 100644
--- a/drivers/s390/cio/device_pgid.c
+++ b/drivers/s390/cio/device_pgid.c
@@ -71,6 +71,8 @@ __ccw_device_sense_pgid_start(struct ccw_device *cdev)
 		ccw->cda = (__u32) __pa (&cdev->private->pgid[i]);
 		if (cdev->private->iretry > 0) {
 			cdev->private->iretry--;
+			/* Reset internal retry indication. */
+			cdev->private->flags.intretry = 0;
 			ret = cio_start (sch, cdev->private->iccws, 
 					 cdev->private->imask);
 			/* ret is 0, -EBUSY, -EACCES or -ENODEV */
@@ -122,8 +124,14 @@ __ccw_device_check_sense_pgid(struct ccw_device *cdev)
 
 	sch = to_subchannel(cdev->dev.parent);
 	irb = &cdev->private->irb;
-	if (irb->scsw.fctl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC))
+	if (irb->scsw.fctl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC)) {
+		/* Retry Sense PGID if requested. */
+		if (cdev->private->flags.intretry) {
+			cdev->private->flags.intretry = 0;
+			return -EAGAIN;
+		}
 		return -ETIME;
+	}
 	if (irb->esw.esw0.erw.cons &&
 	    (irb->ecw[0]&(SNS0_CMD_REJECT|SNS0_INTERVENTION_REQ))) {
 		/*
@@ -253,6 +261,8 @@ __ccw_device_do_pgid(struct ccw_device *cdev, __u8 func)
 	ret = -EACCES;
 	if (cdev->private->iretry > 0) {
 		cdev->private->iretry--;
+		/* Reset internal retry indication. */
+		cdev->private->flags.intretry = 0;
 		ret = cio_start (sch, cdev->private->iccws,
 				 cdev->private->imask);
 		/* We expect an interrupt in case of success or busy
@@ -293,6 +303,8 @@ static int __ccw_device_do_nop(struct ccw_device *cdev)
 	ret = -EACCES;
 	if (cdev->private->iretry > 0) {
 		cdev->private->iretry--;
+		/* Reset internal retry indication. */
+		cdev->private->flags.intretry = 0;
 		ret = cio_start (sch, cdev->private->iccws,
 				 cdev->private->imask);
 		/* We expect an interrupt in case of success or busy
@@ -321,8 +333,14 @@ __ccw_device_check_pgid(struct ccw_device *cdev)
 
 	sch = to_subchannel(cdev->dev.parent);
 	irb = &cdev->private->irb;
-	if (irb->scsw.fctl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC))
+	if (irb->scsw.fctl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC)) {
+		/* Retry Set PGID if requested. */
+		if (cdev->private->flags.intretry) {
+			cdev->private->flags.intretry = 0;
+			return -EAGAIN;
+		}
 		return -ETIME;
+	}
 	if (irb->esw.esw0.erw.cons) {
 		if (irb->ecw[0] & SNS0_CMD_REJECT)
 			return -EOPNOTSUPP;
@@ -360,8 +378,14 @@ static int __ccw_device_check_nop(struct ccw_device *cdev)
 
 	sch = to_subchannel(cdev->dev.parent);
 	irb = &cdev->private->irb;
-	if (irb->scsw.fctl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC))
+	if (irb->scsw.fctl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC)) {
+		/* Retry NOP if requested. */
+		if (cdev->private->flags.intretry) {
+			cdev->private->flags.intretry = 0;
+			return -EAGAIN;
+		}
 		return -ETIME;
+	}
 	if (irb->scsw.cc == 3) {
 		CIO_MSG_EVENT(2, "NOP - Device %04x on Subchannel 0.%x.%04x,"
 			      " lpm %02X, became 'not operational'\n",
diff --git a/drivers/s390/cio/device_status.c b/drivers/s390/cio/device_status.c
index 3f7cbce4cd8..bdcf930f7be 100644
--- a/drivers/s390/cio/device_status.c
+++ b/drivers/s390/cio/device_status.c
@@ -319,6 +319,9 @@ ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb)
 	sch->sense_ccw.count = SENSE_MAX_COUNT;
 	sch->sense_ccw.flags = CCW_FLAG_SLI;
 
+	/* Reset internal retry indication. */
+	cdev->private->flags.intretry = 0;
+
 	return cio_start (sch, &sch->sense_ccw, 0xff);