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Date: Tue, 31 Mar 2009 19:20:31 +0200
From: Martin Schwidefsky <schwidefsky@...ibm.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel <linux-kernel@...r.kernel.org>,
linux-s390 <linux-s390@...r.kernel.org>,
Heiko Carstens <heiko.carstens@...ibm.com>
Subject: [GIT PULL] s390 bug fixes
Hi Linus,
please pull from 'for-linus' branch of
git://git390.marist.edu/pub/scm/linux-2.6.git for-linus
to receive the following updates:
Heiko Carstens (2):
sysrq: include interrupt.h instead of irq.h
[S390] fix hypfs build failure
Sebastian Ott (5):
[S390] cio: wake up on failed recognition
[S390] cio: introduce ccw_device_schedule_sch_unregister
[S390] cio: introduce notifier for boxed state
[S390] cio: disallow online setting of device in transient state
[S390] cio: online_store - trigger recognition for boxed devices
arch/s390/hypfs/hypfs_diag.c | 2 +
arch/s390/include/asm/cio.h | 2 +
drivers/char/sysrq.c | 2 +-
drivers/s390/block/dasd.c | 1 +
drivers/s390/cio/device.c | 43 +++++++++++++++++++++++++---------------
drivers/s390/cio/device.h | 1 +
drivers/s390/cio/device_fsm.c | 31 ++++++++++++++++++-----------
drivers/s390/scsi/zfcp_ccw.c | 5 ++++
8 files changed, 58 insertions(+), 29 deletions(-)
diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c
index b1e892a..704dd39 100644
--- a/arch/s390/hypfs/hypfs_diag.c
+++ b/arch/s390/hypfs/hypfs_diag.c
@@ -12,6 +12,8 @@
#include <linux/types.h>
#include <linux/errno.h>
+#include <linux/gfp.h>
+#include <linux/slab.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <asm/ebcdic.h>
diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h
index 6dccb07..619bf94 100644
--- a/arch/s390/include/asm/cio.h
+++ b/arch/s390/include/asm/cio.h
@@ -456,6 +456,8 @@ struct ciw {
#define CIO_OPER 0x0004
/* Sick revalidation of device. */
#define CIO_REVALIDATE 0x0008
+/* Device did not respond in time. */
+#define CIO_BOXED 0x0010
/**
* struct ccw_dev_id - unique identifier for ccw devices
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 33a9351..3df694e 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -35,7 +35,7 @@
#include <linux/vt_kern.h>
#include <linux/workqueue.h>
#include <linux/kexec.h>
-#include <linux/irq.h>
+#include <linux/interrupt.h>
#include <linux/hrtimer.h>
#include <linux/oom.h>
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 2fd64e5..0570794 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2363,6 +2363,7 @@ int dasd_generic_notify(struct ccw_device *cdev, int event)
ret = 0;
switch (event) {
case CIO_GONE:
+ case CIO_BOXED:
case CIO_NO_PATH:
/* First of all call extended error reporting. */
dasd_eer_write(device, NULL, DASD_EER_NOPATH);
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index c4d2f66..35441fa 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -310,8 +310,6 @@ static void ccw_device_remove_orphan_cb(struct work_struct *work)
put_device(&cdev->dev);
}
-static void ccw_device_call_sch_unregister(struct work_struct *work);
-
static void
ccw_device_remove_disconnected(struct ccw_device *cdev)
{
@@ -335,11 +333,10 @@ ccw_device_remove_disconnected(struct ccw_device *cdev)
spin_unlock_irqrestore(cdev->ccwlock, flags);
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_remove_orphan_cb);
+ queue_work(slow_path_wq, &cdev->private->kick_work);
} else
/* Deregister subchannel, which will kill the ccw device. */
- PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister);
- queue_work(slow_path_wq, &cdev->private->kick_work);
+ ccw_device_schedule_sch_unregister(cdev);
}
/**
@@ -471,7 +468,7 @@ static int online_store_recog_and_online(struct ccw_device *cdev)
int ret;
/* Do device recognition, if needed. */
- if (cdev->id.cu_type == 0) {
+ if (cdev->private->state == DEV_STATE_BOXED) {
ret = ccw_device_recognition(cdev);
if (ret) {
CIO_MSG_EVENT(0, "Couldn't start recognition "
@@ -482,17 +479,21 @@ static int online_store_recog_and_online(struct ccw_device *cdev)
}
wait_event(cdev->private->wait_q,
cdev->private->flags.recog_done);
+ if (cdev->private->state != DEV_STATE_OFFLINE)
+ /* recognition failed */
+ return -EAGAIN;
}
if (cdev->drv && cdev->drv->set_online)
ccw_device_set_online(cdev);
return 0;
}
+
static int online_store_handle_online(struct ccw_device *cdev, int force)
{
int ret;
ret = online_store_recog_and_online(cdev);
- if (ret)
+ if (ret && !force)
return ret;
if (force && cdev->private->state == DEV_STATE_BOXED) {
ret = ccw_device_stlck(cdev);
@@ -500,7 +501,9 @@ static int online_store_handle_online(struct ccw_device *cdev, int force)
return ret;
if (cdev->id.cu_type == 0)
cdev->private->state = DEV_STATE_NOT_OPER;
- online_store_recog_and_online(cdev);
+ ret = online_store_recog_and_online(cdev);
+ if (ret)
+ return ret;
}
return 0;
}
@@ -512,7 +515,11 @@ static ssize_t online_store (struct device *dev, struct device_attribute *attr,
int force, ret;
unsigned long i;
- if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
+ if ((cdev->private->state != DEV_STATE_OFFLINE &&
+ cdev->private->state != DEV_STATE_ONLINE &&
+ cdev->private->state != DEV_STATE_BOXED &&
+ cdev->private->state != DEV_STATE_DISCONNECTED) ||
+ atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
return -EAGAIN;
if (cdev->drv && !try_module_get(cdev->drv->owner)) {
@@ -1014,6 +1021,13 @@ static void ccw_device_call_sch_unregister(struct work_struct *work)
put_device(&sch->dev);
}
+void ccw_device_schedule_sch_unregister(struct ccw_device *cdev)
+{
+ PREPARE_WORK(&cdev->private->kick_work,
+ ccw_device_call_sch_unregister);
+ queue_work(slow_path_wq, &cdev->private->kick_work);
+}
+
/*
* subchannel recognition done. Called from the state machine.
*/
@@ -1025,19 +1039,17 @@ io_subchannel_recog_done(struct ccw_device *cdev)
return;
}
switch (cdev->private->state) {
+ case DEV_STATE_BOXED:
+ /* Device did not respond in time. */
case DEV_STATE_NOT_OPER:
cdev->private->flags.recog_done = 1;
/* Remove device found not operational. */
if (!get_device(&cdev->dev))
break;
- PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister);
- queue_work(slow_path_wq, &cdev->private->kick_work);
+ ccw_device_schedule_sch_unregister(cdev);
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
break;
- case DEV_STATE_BOXED:
- /* Device did not respond in time. */
case DEV_STATE_OFFLINE:
/*
* We can't register the device in interrupt context so
@@ -1551,8 +1563,7 @@ static int purge_fn(struct device *dev, void *data)
goto out;
CIO_MSG_EVENT(3, "ccw: purging 0.%x.%04x\n", priv->dev_id.ssid,
priv->dev_id.devno);
- PREPARE_WORK(&cdev->private->kick_work, ccw_device_call_sch_unregister);
- queue_work(slow_path_wq, &cdev->private->kick_work);
+ ccw_device_schedule_sch_unregister(cdev);
out:
/* Abort loop in case of pending signal. */
diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h
index 85e0184..f1cbbd9 100644
--- a/drivers/s390/cio/device.h
+++ b/drivers/s390/cio/device.h
@@ -87,6 +87,7 @@ int ccw_device_is_orphan(struct ccw_device *);
int ccw_device_recognition(struct ccw_device *);
int ccw_device_online(struct ccw_device *);
int ccw_device_offline(struct ccw_device *);
+void ccw_device_schedule_sch_unregister(struct ccw_device *);
int ccw_purge_blacklisted(void);
/* Function prototypes for device status and basic sense stuff. */
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 87b4bfc..e460492 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -256,13 +256,12 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
old_lpm = 0;
if (sch->lpm != old_lpm)
__recover_lost_chpids(sch, old_lpm);
- if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
- if (state == DEV_STATE_NOT_OPER) {
- cdev->private->flags.recog_done = 1;
- cdev->private->state = DEV_STATE_DISCONNECTED;
- return;
- }
- /* Boxed devices don't need extra treatment. */
+ if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID &&
+ (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) {
+ cdev->private->flags.recog_done = 1;
+ cdev->private->state = DEV_STATE_DISCONNECTED;
+ wake_up(&cdev->private->wait_q);
+ return;
}
notify = 0;
same_dev = 0; /* Keep the compiler quiet... */
@@ -274,7 +273,7 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
sch->schid.ssid, sch->schid.sch_no);
break;
case DEV_STATE_OFFLINE:
- if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
+ if (cdev->online) {
same_dev = ccw_device_handle_oper(cdev);
notify = 1;
}
@@ -307,12 +306,17 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
" subchannel 0.%x.%04x\n",
cdev->private->dev_id.devno,
sch->schid.ssid, sch->schid.sch_no);
+ if (cdev->id.cu_type != 0) { /* device was recognized before */
+ cdev->private->flags.recog_done = 1;
+ cdev->private->state = DEV_STATE_BOXED;
+ wake_up(&cdev->private->wait_q);
+ return;
+ }
break;
}
cdev->private->state = state;
io_subchannel_recog_done(cdev);
- if (state != DEV_STATE_NOT_OPER)
- wake_up(&cdev->private->wait_q);
+ wake_up(&cdev->private->wait_q);
}
/*
@@ -390,10 +394,13 @@ ccw_device_done(struct ccw_device *cdev, int state)
cdev->private->state = state;
-
- if (state == DEV_STATE_BOXED)
+ if (state == DEV_STATE_BOXED) {
CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
cdev->private->dev_id.devno, sch->schid.sch_no);
+ if (cdev->online && !ccw_device_notify(cdev, CIO_BOXED))
+ ccw_device_schedule_sch_unregister(cdev);
+ cdev->private->flags.donotify = 0;
+ }
if (cdev->private->flags.donotify) {
cdev->private->flags.donotify = 0;
diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index 1fe1e2e..cfb0dcb 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -176,6 +176,11 @@ static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event)
zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
"ccnoti4", NULL);
break;
+ case CIO_BOXED:
+ dev_warn(&adapter->ccw_device->dev,
+ "The ccw device did not respond in time.\n");
+ zfcp_erp_adapter_shutdown(adapter, 0, "ccnoti5", NULL);
+ break;
}
return 1;
}
--
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