diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 82 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 36 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_erp.c | 3 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_ext.h | 4 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 2 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 17 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_scsi.c | 4 |
7 files changed, 59 insertions, 89 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 49d5fc729be..324899c96ef 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -118,97 +118,32 @@ _zfcp_hex_dump(char *addr, int count) #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF -static int zfcp_reqlist_init(struct zfcp_adapter *adapter) +static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter) { - int i; + int idx; adapter->req_list = kcalloc(REQUEST_LIST_SIZE, sizeof(struct list_head), GFP_KERNEL); - if (!adapter->req_list) return -ENOMEM; - for (i=0; i<REQUEST_LIST_SIZE; i++) - INIT_LIST_HEAD(&adapter->req_list[i]); - + for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) + INIT_LIST_HEAD(&adapter->req_list[idx]); return 0; } static void zfcp_reqlist_free(struct zfcp_adapter *adapter) { - struct zfcp_fsf_req *request, *tmp; - unsigned int i; - - for (i=0; i<REQUEST_LIST_SIZE; i++) { - if (list_empty(&adapter->req_list[i])) - continue; - - list_for_each_entry_safe(request, tmp, - &adapter->req_list[i], list) - list_del(&request->list); - } - kfree(adapter->req_list); } -void zfcp_reqlist_add(struct zfcp_adapter *adapter, - struct zfcp_fsf_req *fsf_req) -{ - unsigned int i; - - i = fsf_req->req_id % REQUEST_LIST_SIZE; - list_add_tail(&fsf_req->list, &adapter->req_list[i]); -} - -void zfcp_reqlist_remove(struct zfcp_adapter *adapter, unsigned long req_id) -{ - struct zfcp_fsf_req *request, *tmp; - unsigned int i, counter; - u64 dbg_tmp[2]; - - i = req_id % REQUEST_LIST_SIZE; - BUG_ON(list_empty(&adapter->req_list[i])); - - counter = 0; - list_for_each_entry_safe(request, tmp, &adapter->req_list[i], list) { - if (request->req_id == req_id) { - dbg_tmp[0] = (u64) atomic_read(&adapter->reqs_active); - dbg_tmp[1] = (u64) counter; - debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16); - list_del(&request->list); - break; - } - counter++; - } -} - -struct zfcp_fsf_req *zfcp_reqlist_ismember(struct zfcp_adapter *adapter, - unsigned long req_id) -{ - struct zfcp_fsf_req *request, *tmp; - unsigned int i; - - /* 0 is reserved as an invalid req_id */ - if (req_id == 0) - return NULL; - - i = req_id % REQUEST_LIST_SIZE; - - list_for_each_entry_safe(request, tmp, &adapter->req_list[i], list) - if (request->req_id == req_id) - return request; - - return NULL; -} - int zfcp_reqlist_isempty(struct zfcp_adapter *adapter) { - unsigned int i; + unsigned int idx; - for (i=0; i<REQUEST_LIST_SIZE; i++) - if (!list_empty(&adapter->req_list[i])) + for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) + if (!list_empty(&adapter->req_list[idx])) return 0; - return 1; } @@ -1106,7 +1041,7 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) /* initialize list of fsf requests */ spin_lock_init(&adapter->req_list_lock); - retval = zfcp_reqlist_init(adapter); + retval = zfcp_reqlist_alloc(adapter); if (retval) { ZFCP_LOG_INFO("request list initialization failed\n"); goto failed_low_mem_buffers; @@ -1167,6 +1102,7 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); sysfs_failed: dev_set_drvdata(&ccw_device->dev, NULL); + zfcp_reqlist_free(adapter); failed_low_mem_buffers: zfcp_free_low_mem_buffers(adapter); if (qdio_free(ccw_device) != 0) diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 07b0957b82f..22649639230 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -1090,6 +1090,42 @@ extern void _zfcp_hex_dump(char *, int); #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port)) /* + * Helper functions for request ID management. + */ +static inline int zfcp_reqlist_hash(unsigned long req_id) +{ + return req_id % REQUEST_LIST_SIZE; +} + +static inline void zfcp_reqlist_add(struct zfcp_adapter *adapter, + struct zfcp_fsf_req *fsf_req) +{ + unsigned int idx; + + idx = zfcp_reqlist_hash(fsf_req->req_id); + list_add_tail(&fsf_req->list, &adapter->req_list[idx]); +} + +static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter, + struct zfcp_fsf_req *fsf_req) +{ + list_del(&fsf_req->list); +} + +static inline struct zfcp_fsf_req * +zfcp_reqlist_find(struct zfcp_adapter *adapter, unsigned long req_id) +{ + struct zfcp_fsf_req *request; + unsigned int idx; + + idx = zfcp_reqlist_hash(req_id); + list_for_each_entry(request, &adapter->req_list[idx], list) + if (request->req_id == req_id) + return request; + return NULL; +} + +/* * functions needed for reference/usage counting */ diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 88557230058..e2a3d6fe165 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -847,8 +847,7 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) if (erp_action->fsf_req) { /* take lock to ensure that request is not deleted meanwhile */ spin_lock(&adapter->req_list_lock); - if (zfcp_reqlist_ismember(adapter, - erp_action->fsf_req->req_id)) { + if (zfcp_reqlist_find(adapter, erp_action->fsf_req->req_id)) { /* fsf_req still exists */ debug_text_event(adapter->erp_dbf, 3, "a_ca_req"); debug_event(adapter->erp_dbf, 3, &erp_action->fsf_req, diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index 01386ac688a..991d45667a4 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -184,10 +184,6 @@ extern void zfcp_scsi_dbf_event_abort(const char *, struct zfcp_adapter *, unsigned long); extern void zfcp_scsi_dbf_event_devreset(const char *, u8, struct zfcp_unit *, struct scsi_cmnd *); -extern void zfcp_reqlist_add(struct zfcp_adapter *, struct zfcp_fsf_req *); -extern void zfcp_reqlist_remove(struct zfcp_adapter *, unsigned long); -extern struct zfcp_fsf_req *zfcp_reqlist_ismember(struct zfcp_adapter *, - unsigned long); extern int zfcp_reqlist_isempty(struct zfcp_adapter *); #endif /* ZFCP_EXT_H */ diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index 07094c3dc34..083308b1d3e 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -4787,7 +4787,7 @@ static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req) retval = -EIO; del_timer(&fsf_req->timer); spin_lock(&adapter->req_list_lock); - zfcp_reqlist_remove(adapter, fsf_req->req_id); + zfcp_reqlist_remove(adapter, fsf_req); spin_unlock(&adapter->req_list_lock); /* undo changes in request queue made for this request */ zfcp_qdio_zero_sbals(req_queue->buffer, diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index e50e6ad4e6c..cb08ca3cc0f 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -283,7 +283,7 @@ zfcp_qdio_request_handler(struct ccw_device *ccw_device, } /** - * zfcp_qdio_reqid_check - checks for valid reqids or unsolicited status + * zfcp_qdio_reqid_check - checks for valid reqids. */ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, unsigned long req_id) @@ -294,14 +294,17 @@ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, debug_long_event(adapter->erp_dbf, 4, req_id); spin_lock_irqsave(&adapter->req_list_lock, flags); - fsf_req = zfcp_reqlist_ismember(adapter, req_id); + fsf_req = zfcp_reqlist_find(adapter, req_id); - if (!fsf_req) { - spin_unlock_irqrestore(&adapter->req_list_lock, flags); - panic("error: unknown request id (%ld).\n", req_id); - } + if (!fsf_req) + /* + * Unknown request means that we have potentially memory + * corruption and must stop the machine immediatly. + */ + panic("error: unknown request id (%ld) on adapter %s.\n", + req_id, zfcp_get_busid_by_adapter(adapter)); - zfcp_reqlist_remove(adapter, req_id); + zfcp_reqlist_remove(adapter, fsf_req); atomic_dec(&adapter->reqs_active); spin_unlock_irqrestore(&adapter->req_list_lock, flags); diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index e742b3de16a..16e2d64658a 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -407,8 +407,8 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) /* Check whether corresponding fsf_req is still pending */ spin_lock(&adapter->req_list_lock); - fsf_req = zfcp_reqlist_ismember(adapter, (unsigned long) - scpnt->host_scribble); + fsf_req = zfcp_reqlist_find(adapter, + (unsigned long) scpnt->host_scribble); spin_unlock(&adapter->req_list_lock); if (!fsf_req) { write_unlock_irqrestore(&adapter->abort_lock, flags); |