diff options
Diffstat (limited to 'drivers/s390/scsi')
| -rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 8 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 2 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_erp.c | 4 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_ext.h | 2 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 79 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 28 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_scsi.c | 2 |
7 files changed, 45 insertions, 80 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 6bb4d332b474..c999042dae15 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -520,7 +520,7 @@ zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, out: if (fsf_req != NULL) - zfcp_fsf_req_cleanup(fsf_req); + zfcp_fsf_req_free(fsf_req); if ((adapter != NULL) && (retval != -ENXIO)) zfcp_adapter_put(adapter); @@ -1149,7 +1149,7 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) INIT_LIST_HEAD(&adapter->port_remove_lh); /* initialize list of fsf requests */ - rwlock_init(&adapter->fsf_req_list_lock); + spin_lock_init(&adapter->fsf_req_list_lock); INIT_LIST_HEAD(&adapter->fsf_req_list_head); /* initialize abort lock */ @@ -1234,9 +1234,9 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); dev_set_drvdata(&adapter->ccw_device->dev, NULL); /* sanity check: no pending FSF requests */ - read_lock_irqsave(&adapter->fsf_req_list_lock, flags); + spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); retval = !list_empty(&adapter->fsf_req_list_head); - read_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); + spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); if (retval) { ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, " "%i requests outstanding\n", diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 37982058e4d9..bfbbb825f9ab 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -861,7 +861,7 @@ struct zfcp_adapter { u32 ports; /* number of remote ports */ struct timer_list scsi_er_timer; /* SCSI err recovery watch */ struct list_head fsf_req_list_head; /* head of FSF req list */ - rwlock_t fsf_req_list_lock; /* lock for ops on list of + spinlock_t fsf_req_list_lock; /* lock for ops on list of FSF requests */ atomic_t fsf_reqs_active; /* # active FSF reqs */ struct zfcp_qdio_queue request_queue; /* request queue */ diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 41c67e1ec4f7..6d73891eec9e 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -891,7 +891,7 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) if (erp_action->fsf_req) { /* take lock to ensure that request is not being deleted meanwhile */ - write_lock(&adapter->fsf_req_list_lock); + spin_lock(&adapter->fsf_req_list_lock); /* check whether fsf req does still exist */ list_for_each_entry(fsf_req, &adapter->fsf_req_list_head, list) if (fsf_req == erp_action->fsf_req) @@ -934,7 +934,7 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) */ erp_action->fsf_req = NULL; } - write_unlock(&adapter->fsf_req_list_lock); + spin_unlock(&adapter->fsf_req_list_lock); } else debug_text_event(adapter->erp_dbf, 3, "a_ca_noreq"); diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index d5fd43352071..8f0da2e02a47 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -116,7 +116,7 @@ extern int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *, struct timer_list*, int); extern int zfcp_fsf_req_complete(struct zfcp_fsf_req *); extern void zfcp_fsf_incoming_els(struct zfcp_fsf_req *); -extern void zfcp_fsf_req_cleanup(struct zfcp_fsf_req *); +extern void zfcp_fsf_req_free(struct zfcp_fsf_req *); extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_command_task_management( struct zfcp_adapter *, struct zfcp_unit *, u8, int); extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command( diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index 21a6d7633475..56b2ea97da1f 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -61,7 +61,6 @@ static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *); static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *); static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *); -static void zfcp_fsf_req_free(struct zfcp_fsf_req *); /* association between FSF command and FSF QTCB type */ static u32 fsf_qtcb_type[] = { @@ -149,13 +148,13 @@ zfcp_fsf_req_alloc(mempool_t *pool, int req_flags) * * locks: none */ -static void +void zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) { if (likely(fsf_req->pool != NULL)) mempool_free(fsf_req, fsf_req->pool); - else - kfree(fsf_req); + else + kfree(fsf_req); } /* @@ -170,30 +169,21 @@ zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) int zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) { - int retval = 0; struct zfcp_fsf_req *fsf_req, *tmp; + unsigned long flags; + LIST_HEAD(remove_queue); - list_for_each_entry_safe(fsf_req, tmp, &adapter->fsf_req_list_head, - list) - zfcp_fsf_req_dismiss(fsf_req); - /* wait_event_timeout? */ - while (!list_empty(&adapter->fsf_req_list_head)) { - ZFCP_LOG_DEBUG("fsf req list of adapter %s not yet empty\n", - zfcp_get_busid_by_adapter(adapter)); - /* wait for woken intiators to clean up their requests */ - msleep(jiffies_to_msecs(ZFCP_FSFREQ_CLEANUP_TIMEOUT)); - } + spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); + list_splice_init(&adapter->fsf_req_list_head, &remove_queue); + atomic_set(&adapter->fsf_reqs_active, 0); + spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); - /* consistency check */ - if (atomic_read(&adapter->fsf_reqs_active)) { - ZFCP_LOG_NORMAL("bug: There are still %d FSF requests pending " - "on adapter %s after cleanup.\n", - atomic_read(&adapter->fsf_reqs_active), - zfcp_get_busid_by_adapter(adapter)); - atomic_set(&adapter->fsf_reqs_active, 0); + list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) { + list_del(&fsf_req->list); + zfcp_fsf_req_dismiss(fsf_req); } - return retval; + return 0; } /* @@ -226,10 +216,6 @@ zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) { int retval = 0; int cleanup; - struct zfcp_adapter *adapter = fsf_req->adapter; - - /* do some statistics */ - atomic_dec(&adapter->fsf_reqs_active); if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { ZFCP_LOG_DEBUG("Status read response received\n"); @@ -260,7 +246,7 @@ zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) * lock must not be held here since it will be * grabed by the called routine, too */ - zfcp_fsf_req_cleanup(fsf_req); + zfcp_fsf_req_free(fsf_req); } else { /* notify initiator waiting for the requests completion */ ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req); @@ -936,7 +922,7 @@ zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { mempool_free(status_buffer, adapter->pool.data_status_read); - zfcp_fsf_req_cleanup(fsf_req); + zfcp_fsf_req_free(fsf_req); goto out; } @@ -1033,7 +1019,7 @@ zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) break; } mempool_free(status_buffer, adapter->pool.data_status_read); - zfcp_fsf_req_cleanup(fsf_req); + zfcp_fsf_req_free(fsf_req); /* * recycle buffer and start new request repeat until outbound * queue is empty or adapter shutdown is requested @@ -2258,7 +2244,7 @@ zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter, wait_event(fsf_req->completion_wq, fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); del_timer_sync(timer); - zfcp_fsf_req_cleanup(fsf_req); + zfcp_fsf_req_free(fsf_req); out: kfree(timer); return retval; @@ -4607,7 +4593,7 @@ zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req, *status = fsf_req->status; /* cleanup request */ - zfcp_fsf_req_cleanup(fsf_req); + zfcp_fsf_req_free(fsf_req); out: return retval; } @@ -4806,9 +4792,9 @@ zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer) inc_seq_no = 0; /* put allocated FSF request at list tail */ - write_lock_irqsave(&adapter->fsf_req_list_lock, flags); + spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head); - write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); + spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); /* figure out expiration time of timeout and start timeout */ if (unlikely(timer)) { @@ -4852,9 +4838,9 @@ zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer) */ if (timer) del_timer(timer); - write_lock_irqsave(&adapter->fsf_req_list_lock, flags); + spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); list_del(&fsf_req->list); - write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); + spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); /* * adjust the number of free SBALs in request queue as well as * position of first one @@ -4892,25 +4878,4 @@ zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer) return retval; } -/* - * function: zfcp_fsf_req_cleanup - * - * purpose: cleans up an FSF request and removes it from the specified list - * - * returns: - * - * assumption: no pending SB in SBALEs other than QTCB - */ -void -zfcp_fsf_req_cleanup(struct zfcp_fsf_req *fsf_req) -{ - struct zfcp_adapter *adapter = fsf_req->adapter; - unsigned long flags; - - write_lock_irqsave(&adapter->fsf_req_list_lock, flags); - list_del(&fsf_req->list); - write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); - zfcp_fsf_req_free(fsf_req); -} - #undef ZFCP_LOG_AREA diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index fb218dd9d934..24e16ec331d9 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -446,37 +446,37 @@ int zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, void *sbale_addr) { struct zfcp_fsf_req *fsf_req; - int retval = 0; /* invalid (per convention used in this driver) */ if (unlikely(!sbale_addr)) { ZFCP_LOG_NORMAL("bug: invalid reqid\n"); - retval = -EINVAL; - goto out; + return -EINVAL; } /* valid request id and thus (hopefully :) valid fsf_req address */ fsf_req = (struct zfcp_fsf_req *) sbale_addr; + /* serialize with zfcp_fsf_req_dismiss_all */ + spin_lock(&adapter->fsf_req_list_lock); + if (list_empty(&adapter->fsf_req_list_head)) { + spin_unlock(&adapter->fsf_req_list_lock); + return 0; + } + list_del(&fsf_req->list); + atomic_dec(&adapter->fsf_reqs_active); + spin_unlock(&adapter->fsf_req_list_lock); + if (unlikely(adapter != fsf_req->adapter)) { ZFCP_LOG_NORMAL("bug: invalid reqid (fsf_req=%p, " "fsf_req->adapter=%p, adapter=%p)\n", fsf_req, fsf_req->adapter, adapter); - retval = -EINVAL; - goto out; - } - - ZFCP_LOG_TRACE("fsf_req at %p, QTCB at %p\n", fsf_req, fsf_req->qtcb); - if (likely(fsf_req->qtcb)) { - ZFCP_LOG_TRACE("hex dump of QTCB:\n"); - ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) fsf_req->qtcb, - sizeof(struct fsf_qtcb)); + return -EINVAL; } /* finish the FSF request */ zfcp_fsf_req_complete(fsf_req); - out: - return retval; + + return 0; } /** diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index e21b547fd427..c6f69fc475a2 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -575,7 +575,7 @@ zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) *(u64 *) & new_fsf_req->qtcb->header.fsf_status_qual.word[0]; dbf_fsf_qual[1] = *(u64 *) & new_fsf_req->qtcb->header.fsf_status_qual.word[2]; - zfcp_fsf_req_cleanup(new_fsf_req); + zfcp_fsf_req_free(new_fsf_req); #else retval = zfcp_fsf_req_wait_and_cleanup(new_fsf_req, ZFCP_UNINTERRUPTIBLE, &status); |