From 5886cea45d1b230f86fd24de708b0d9f14ff88db Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Tue, 31 Mar 2009 19:13:13 +0200 Subject: [PATCH] sysrq: include interrupt.h instead of irq.h With "cpumask: update irq_desc to use cpumask_var_t" we get this build failure on s390: CC drivers/char/sysrq.o In file included from drivers/char/sysrq.c:38: include/linux/irq.h: In function 'init_alloc_desc_masks': include/linux/irq.h:442: error: dereferencing pointer to incomplete type drivers/char/sysrq.c should include interrupt.h instead of irq.h. Cc: Mike Travis Cc: Ingo Molnar Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- drivers/char/sysrq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c index 33a9351c896..3df694e5454 100644 --- a/drivers/char/sysrq.c +++ b/drivers/char/sysrq.c @@ -35,7 +35,7 @@ #include #include #include -#include +#include #include #include -- cgit v1.2.3-18-g5258 From 156013ffd1225ef862853a4340b46f76845f8db1 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 31 Mar 2009 19:16:03 +0200 Subject: [S390] cio: wake up on failed recognition Wake up even on failed device recognition, since this may be triggered from a user trying to force a device online. With this patch a write to the online sysfs attribute will not block for ever but return with -EAGAIN in this case. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/device.c | 10 ++++++++-- drivers/s390/cio/device_fsm.c | 4 ++-- 2 files changed, 10 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index c4d2f667a2f..9f016fef610 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -482,17 +482,21 @@ 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 +504,9 @@ 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; } diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c index 87b4bfca080..ccd72f95765 100644 --- a/drivers/s390/cio/device_fsm.c +++ b/drivers/s390/cio/device_fsm.c @@ -260,6 +260,7 @@ ccw_device_recog_done(struct ccw_device *cdev, int state) if (state == DEV_STATE_NOT_OPER) { cdev->private->flags.recog_done = 1; cdev->private->state = DEV_STATE_DISCONNECTED; + wake_up(&cdev->private->wait_q); return; } /* Boxed devices don't need extra treatment. */ @@ -311,8 +312,7 @@ ccw_device_recog_done(struct ccw_device *cdev, int state) } 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); } /* -- cgit v1.2.3-18-g5258 From c4621a62649a56f155a96dfc5de479be226f0768 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 31 Mar 2009 19:16:04 +0200 Subject: [S390] cio: introduce ccw_device_schedule_sch_unregister Introduce ccw_device_schedule_sch_unregister as a wrapper for queuing ccw_device_call_sch_unregister on the slow_path_wq. This wrapper will be used in the next patch. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/device.c | 21 +++++++++++---------- drivers/s390/cio/device.h | 1 + 2 files changed, 12 insertions(+), 10 deletions(-) (limited to 'drivers') diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 9f016fef610..cdbf664ed44 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); } /** @@ -1020,6 +1017,13 @@ 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. */ @@ -1036,9 +1040,7 @@ io_subchannel_recog_done(struct ccw_device *cdev) /* 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; @@ -1557,8 +1559,7 @@ 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 85e01846ca6..f1cbbd94ad4 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. */ -- cgit v1.2.3-18-g5258 From 47593bfa1056d306fde067b28dd8617009be4121 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 31 Mar 2009 19:16:05 +0200 Subject: [S390] cio: introduce notifier for boxed state If a ccw device did not respond in time during internal io, we set it into boxed state. With this patch we have the following behaviour: * the ccw driver will get a notification if the device was online and goes into the boxed state * if the device was disconnected and got boxed nothing special is to be done (it will be handled in reprobing later) * if the device got boxed while initial sensing it will be unregistered Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/block/dasd.c | 1 + drivers/s390/cio/device.c | 4 ++-- drivers/s390/cio/device_fsm.c | 29 ++++++++++++++++++----------- drivers/s390/scsi/zfcp_ccw.c | 5 +++++ 4 files changed, 26 insertions(+), 13 deletions(-) (limited to 'drivers') diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 2fd64e5a9ab..0570794ccf1 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 cdbf664ed44..868f8c6b053 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -1035,6 +1035,8 @@ 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. */ @@ -1044,8 +1046,6 @@ io_subchannel_recog_done(struct ccw_device *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 diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c index ccd72f95765..e4604926156 100644 --- a/drivers/s390/cio/device_fsm.c +++ b/drivers/s390/cio/device_fsm.c @@ -256,14 +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; - wake_up(&cdev->private->wait_q); - 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... */ @@ -275,7 +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; } @@ -308,6 +306,12 @@ 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; @@ -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 1fe1e2eda51..cfb0dcb6e3f 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; } -- cgit v1.2.3-18-g5258 From b5cd99e6b002776c0e946f38292adbb0258b7983 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 31 Mar 2009 19:16:06 +0200 Subject: [S390] cio: disallow online setting of device in transient state Return -EAGAIN on writes to sysfs online attribute if the corresponding ccw device is in transient state. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/device.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 868f8c6b053..e47aa3f0476 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -515,7 +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)) { -- cgit v1.2.3-18-g5258 From 99f6a570eedc885675b6aa36b7acdbdcc3a7f55b Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 31 Mar 2009 19:16:07 +0200 Subject: [S390] cio: online_store - trigger recognition for boxed devices Start a new device recognition if someone writes to sysfs online attribute of a boxed ccw device. The current test will fail, since cu_type != 0 for devices which were recognized before. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/device.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index e47aa3f0476..35441fa16be 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -468,7 +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 " -- cgit v1.2.3-18-g5258