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authorGreg Kroah-Hartman <gregkh@suse.de>2006-08-26 13:04:23 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-08-26 13:04:23 -0700
commitf834c755423332a6ff4397fae754029a6a7a8249 (patch)
tree004266b9612a69484a5dc0dc3d6db0d1e5ab60d5 /drivers/s390
parent62250b3bb596ffbae17c4b3d865fecd6329ce8b3 (diff)
parent0db99e3359234be181590463184b9959059a9ea9 (diff)
Merge gregkh@master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/scsi/zfcp_aux.c120
-rw-r--r--drivers/s390/scsi/zfcp_ccw.c5
-rw-r--r--drivers/s390/scsi/zfcp_def.h15
-rw-r--r--drivers/s390/scsi/zfcp_erp.c212
-rw-r--r--drivers/s390/scsi/zfcp_ext.h9
-rw-r--r--drivers/s390/scsi/zfcp_fsf.c122
-rw-r--r--drivers/s390/scsi/zfcp_qdio.c79
-rw-r--r--drivers/s390/scsi/zfcp_scsi.c73
8 files changed, 339 insertions, 296 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index 9cd789b8acd..adc9d8f2c28 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -112,6 +112,105 @@ _zfcp_hex_dump(char *addr, int count)
printk("\n");
}
+
+/****************************************************************/
+/****** Functions to handle the request ID hash table ********/
+/****************************************************************/
+
+#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
+
+static int zfcp_reqlist_init(struct zfcp_adapter *adapter)
+{
+ int i;
+
+ 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]);
+
+ 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;
+
+ 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;
+
+ for (i=0; i<REQUEST_LIST_SIZE; i++)
+ if (!list_empty(&adapter->req_list[i]))
+ return 0;
+
+ return 1;
+}
+
+#undef ZFCP_LOG_AREA
+
/****************************************************************/
/************** Uncategorised Functions *************************/
/****************************************************************/
@@ -961,8 +1060,12 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device)
INIT_LIST_HEAD(&adapter->port_remove_lh);
/* initialize list of fsf requests */
- spin_lock_init(&adapter->fsf_req_list_lock);
- INIT_LIST_HEAD(&adapter->fsf_req_list_head);
+ spin_lock_init(&adapter->req_list_lock);
+ retval = zfcp_reqlist_init(adapter);
+ if (retval) {
+ ZFCP_LOG_INFO("request list initialization failed\n");
+ goto failed_low_mem_buffers;
+ }
/* initialize debug locks */
@@ -1041,8 +1144,6 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device)
* !0 - struct zfcp_adapter data structure could not be removed
* (e.g. still used)
* locks: adapter list write lock is assumed to be held by caller
- * adapter->fsf_req_list_lock is taken and released within this
- * function and must not be held on entry
*/
void
zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
@@ -1054,14 +1155,14 @@ 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 */
- spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
- retval = !list_empty(&adapter->fsf_req_list_head);
- spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
- if (retval) {
+ spin_lock_irqsave(&adapter->req_list_lock, flags);
+ retval = zfcp_reqlist_isempty(adapter);
+ spin_unlock_irqrestore(&adapter->req_list_lock, flags);
+ if (!retval) {
ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, "
"%i requests outstanding\n",
zfcp_get_busid_by_adapter(adapter), adapter,
- atomic_read(&adapter->fsf_reqs_active));
+ atomic_read(&adapter->reqs_active));
retval = -EBUSY;
goto out;
}
@@ -1087,6 +1188,7 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
zfcp_free_low_mem_buffers(adapter);
/* free memory of adapter data structure and queues */
zfcp_qdio_free_queues(adapter);
+ zfcp_reqlist_free(adapter);
kfree(adapter->fc_stats);
kfree(adapter->stats_reset_data);
ZFCP_LOG_TRACE("freeing adapter structure\n");
diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index 57d8e4bfb8d..fdabadeaa9e 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -164,6 +164,11 @@ zfcp_ccw_set_online(struct ccw_device *ccw_device)
retval = zfcp_adapter_scsi_register(adapter);
if (retval)
goto out_scsi_register;
+
+ /* initialize request counter */
+ BUG_ON(!zfcp_reqlist_isempty(adapter));
+ adapter->req_no = 0;
+
zfcp_erp_modify_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING,
ZFCP_SET);
zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 2df512a18e2..94d1b74db35 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -52,7 +52,7 @@
/********************* GENERAL DEFINES *********************************/
/* zfcp version number, it consists of major, minor, and patch-level number */
-#define ZFCP_VERSION "4.7.0"
+#define ZFCP_VERSION "4.8.0"
/**
* zfcp_sg_to_address - determine kernel address from struct scatterlist
@@ -80,7 +80,7 @@ zfcp_address_to_sg(void *address, struct scatterlist *list)
#define REQUEST_LIST_SIZE 128
/********************* SCSI SPECIFIC DEFINES *********************************/
-#define ZFCP_SCSI_ER_TIMEOUT (100*HZ)
+#define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
/********************* CIO/QDIO SPECIFIC DEFINES *****************************/
@@ -886,11 +886,11 @@ struct zfcp_adapter {
struct list_head port_remove_lh; /* head of ports to be
removed */
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 */
- spinlock_t fsf_req_list_lock; /* lock for ops on list of
- FSF requests */
- atomic_t fsf_reqs_active; /* # active FSF reqs */
+ struct timer_list scsi_er_timer; /* SCSI err recovery watch */
+ atomic_t reqs_active; /* # active FSF reqs */
+ unsigned long req_no; /* unique FSF req number */
+ struct list_head *req_list; /* list of pending reqs */
+ spinlock_t req_list_lock; /* request list lock */
struct zfcp_qdio_queue request_queue; /* request queue */
u32 fsf_req_seq_no; /* FSF cmnd seq number */
wait_queue_head_t request_wq; /* can be used to wait for
@@ -986,6 +986,7 @@ struct zfcp_unit {
/* FSF request */
struct zfcp_fsf_req {
struct list_head list; /* list of FSF requests */
+ unsigned long req_id; /* unique request ID */
struct zfcp_adapter *adapter; /* adapter request belongs to */
u8 sbal_number; /* nr of SBALs free for use */
u8 sbal_first; /* first SBAL for this request */
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 8ec8da0beaa..7f60b6fdf72 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -64,8 +64,8 @@ static int zfcp_erp_strategy_check_action(struct zfcp_erp_action *, int);
static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *);
static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *, int);
static int zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *);
+static void zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *);
+static void zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *);
static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *);
static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *);
static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *);
@@ -93,10 +93,9 @@ static int zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *);
static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *);
static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *);
-static int zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *);
-static int zfcp_erp_action_dismiss_port(struct zfcp_port *);
-static int zfcp_erp_action_dismiss_unit(struct zfcp_unit *);
-static int zfcp_erp_action_dismiss(struct zfcp_erp_action *);
+static void zfcp_erp_action_dismiss_port(struct zfcp_port *);
+static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *);
+static void zfcp_erp_action_dismiss(struct zfcp_erp_action *);
static int zfcp_erp_action_enqueue(int, struct zfcp_adapter *,
struct zfcp_port *, struct zfcp_unit *);
@@ -135,29 +134,39 @@ zfcp_fsf_request_timeout_handler(unsigned long data)
zfcp_erp_adapter_reopen(adapter, 0);
}
-/*
- * function: zfcp_fsf_scsi_er_timeout_handler
- *
- * purpose: This function needs to be called whenever a SCSI error recovery
- * action (abort/reset) does not return.
- * Re-opening the adapter means that the command can be returned
- * by zfcp (it is guarranteed that it does not return via the
- * adapter anymore). The buffer can then be used again.
- *
- * returns: sod all
+/**
+ * zfcp_fsf_scsi_er_timeout_handler - timeout handler for scsi eh tasks
+ *
+ * This function needs to be called whenever a SCSI error recovery
+ * action (abort/reset) does not return. Re-opening the adapter means
+ * that the abort/reset command can be returned by zfcp. It won't complete
+ * via the adapter anymore (because qdio queues are closed). If ERP is
+ * already running on this adapter it will be stopped.
*/
-void
-zfcp_fsf_scsi_er_timeout_handler(unsigned long data)
+void zfcp_fsf_scsi_er_timeout_handler(unsigned long data)
{
struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
+ unsigned long flags;
ZFCP_LOG_NORMAL("warning: SCSI error recovery timed out. "
"Restarting all operations on the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
debug_text_event(adapter->erp_dbf, 1, "eh_lmem_tout");
- zfcp_erp_adapter_reopen(adapter, 0);
- return;
+ write_lock_irqsave(&adapter->erp_lock, flags);
+ if (atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
+ &adapter->status)) {
+ zfcp_erp_modify_adapter_status(adapter,
+ ZFCP_STATUS_COMMON_UNBLOCKED|ZFCP_STATUS_COMMON_OPEN,
+ ZFCP_CLEAR);
+ zfcp_erp_action_dismiss_adapter(adapter);
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
+ /* dismiss all pending requests including requests for ERP */
+ zfcp_fsf_req_dismiss_all(adapter);
+ adapter->fsf_req_seq_no = 0;
+ } else
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
+ zfcp_erp_adapter_reopen(adapter, 0);
}
/*
@@ -670,17 +679,10 @@ zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear_mask)
return retval;
}
-/*
- * function:
- *
- * purpose: disable I/O,
- * return any open requests and clean them up,
- * aim: no pending and incoming I/O
- *
- * returns:
+/**
+ * zfcp_erp_adapter_block - mark adapter as blocked, block scsi requests
*/
-static void
-zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask)
+static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask)
{
debug_text_event(adapter->erp_dbf, 6, "a_bl");
zfcp_erp_modify_adapter_status(adapter,
@@ -688,15 +690,10 @@ zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask)
clear_mask, ZFCP_CLEAR);
}
-/*
- * function:
- *
- * purpose: enable I/O
- *
- * returns:
+/**
+ * zfcp_erp_adapter_unblock - mark adapter as unblocked, allow scsi requests
*/
-static void
-zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter)
+static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter)
{
debug_text_event(adapter->erp_dbf, 6, "a_ubl");
atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status);
@@ -848,18 +845,16 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action)
struct zfcp_adapter *adapter = erp_action->adapter;
if (erp_action->fsf_req) {
- /* take lock to ensure that request is not being deleted meanwhile */
- 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)
- break;
- if (fsf_req && (fsf_req->erp_action == erp_action)) {
+ /* 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)) &&
+ (fsf_req->erp_action == erp_action)) {
/* fsf_req still exists */
debug_text_event(adapter->erp_dbf, 3, "a_ca_req");
debug_event(adapter->erp_dbf, 3, &fsf_req,
sizeof (unsigned long));
- /* dismiss fsf_req of timed out or dismissed erp_action */
+ /* dismiss fsf_req of timed out/dismissed erp_action */
if (erp_action->status & (ZFCP_STATUS_ERP_DISMISSED |
ZFCP_STATUS_ERP_TIMEDOUT)) {
debug_text_event(adapter->erp_dbf, 3,
@@ -892,30 +887,22 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action)
*/
erp_action->fsf_req = NULL;
}
- spin_unlock(&adapter->fsf_req_list_lock);
+ spin_unlock(&adapter->req_list_lock);
} else
debug_text_event(adapter->erp_dbf, 3, "a_ca_noreq");
return retval;
}
-/*
- * purpose: generic handler for asynchronous events related to erp_action events
- * (normal completion, time-out, dismissing, retry after
- * low memory condition)
- *
- * note: deletion of timer is not required (e.g. in case of a time-out),
- * but a second try does no harm,
- * we leave it in here to allow for greater simplification
+/**
+ * zfcp_erp_async_handler_nolock - complete erp_action
*
- * returns: 0 - there was an action to handle
- * !0 - otherwise
+ * Used for normal completion, time-out, dismissal and failure after
+ * low memory condition.
*/
-static int
-zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action,
- unsigned long set_mask)
+static void zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action,
+ unsigned long set_mask)
{
- int retval;
struct zfcp_adapter *adapter = erp_action->adapter;
if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) {
@@ -926,43 +913,26 @@ zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action,
del_timer(&erp_action->timer);
erp_action->status |= set_mask;
zfcp_erp_action_ready(erp_action);
- retval = 0;
} else {
/* action is ready or gone - nothing to do */
debug_text_event(adapter->erp_dbf, 3, "a_asyh_gone");
debug_event(adapter->erp_dbf, 3, &erp_action->action,
sizeof (int));
- retval = 1;
}
-
- return retval;
}
-/*
- * purpose: generic handler for asynchronous events related to erp_action
- * events (normal completion, time-out, dismissing, retry after
- * low memory condition)
- *
- * note: deletion of timer is not required (e.g. in case of a time-out),
- * but a second try does no harm,
- * we leave it in here to allow for greater simplification
- *
- * returns: 0 - there was an action to handle
- * !0 - otherwise
+/**
+ * zfcp_erp_async_handler - wrapper for erp_async_handler_nolock w/ locking
*/
-int
-zfcp_erp_async_handler(struct zfcp_erp_action *erp_action,
- unsigned long set_mask)
+void zfcp_erp_async_handler(struct zfcp_erp_action *erp_action,
+ unsigned long set_mask)
{
struct zfcp_adapter *adapter = erp_action->adapter;
unsigned long flags;
- int retval;
write_lock_irqsave(&adapter->erp_lock, flags);
- retval = zfcp_erp_async_handler_nolock(erp_action, set_mask);
+ zfcp_erp_async_handler_nolock(erp_action, set_mask);
write_unlock_irqrestore(&adapter->erp_lock, flags);
-
- return retval;
}
/*
@@ -999,17 +969,15 @@ zfcp_erp_timeout_handler(unsigned long data)
zfcp_erp_async_handler(erp_action, ZFCP_STATUS_ERP_TIMEDOUT);
}
-/*
- * purpose: is called for an erp_action which needs to be ended
- * though not being done,
- * this is usually required if an higher is generated,
- * action gets an appropriate flag and will be processed
- * accordingly
+/**
+ * zfcp_erp_action_dismiss - dismiss an erp_action
*
- * locks: erp_lock held (thus we need to call another handler variant)
+ * adapter->erp_lock must be held
+ *
+ * Dismissal of an erp_action is usually required if an erp_action of
+ * higher priority is generated.
*/
-static int
-zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action)
+static void zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action)
{
struct zfcp_adapter *adapter = erp_action->adapter;
@@ -1017,8 +985,6 @@ zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action)
debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int));
zfcp_erp_async_handler_nolock(erp_action, ZFCP_STATUS_ERP_DISMISSED);
-
- return 0;
}
int
@@ -2074,18 +2040,12 @@ zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action)
return retval;
}
-/*
- * function: zfcp_qdio_cleanup
- *
- * purpose: cleans up QDIO operation for the specified adapter
- *
- * returns: 0 - successful cleanup
- * !0 - failed cleanup
+/**
+ * zfcp_erp_adapter_strategy_close_qdio - close qdio queues for an adapter
*/
-int
+static void
zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *erp_action)
{
- int retval = ZFCP_ERP_SUCCEEDED;
int first_used;
int used_count;
struct zfcp_adapter *adapter = erp_action->adapter;
@@ -2094,15 +2054,13 @@ zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *erp_action)
ZFCP_LOG_DEBUG("error: attempt to shut down inactive QDIO "
"queues on adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
- retval = ZFCP_ERP_FAILED;
- goto out;
+ return;
}
/*
* Get queue_lock and clear QDIOUP flag. Thus it's guaranteed that
* do_QDIO won't be called while qdio_shutdown is in progress.
*/
-
write_lock_irq(&adapter->request_queue.queue_lock);
atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
write_unlock_irq(&adapter->request_queue.queue_lock);
@@ -2134,8 +2092,6 @@ zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *erp_action)
adapter->request_queue.free_index = 0;
atomic_set(&adapter->request_queue.free_count, 0);
adapter->request_queue.distance_from_int = 0;
- out:
- return retval;
}
static int
@@ -2258,11 +2214,11 @@ zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action)
"%s)\n", zfcp_get_busid_by_adapter(adapter));
ret = ZFCP_ERP_FAILED;
}
- if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status)) {
- ZFCP_LOG_INFO("error: exchange port data failed (adapter "
+
+ /* don't treat as error for the sake of compatibility */
+ if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status))
+ ZFCP_LOG_INFO("warning: exchange port data failed (adapter "
"%s\n", zfcp_get_busid_by_adapter(adapter));
- ret = ZFCP_ERP_FAILED;
- }
return ret;
}
@@ -2292,18 +2248,12 @@ zfcp_erp_adapter_strategy_open_fsf_statusread(struct zfcp_erp_action
return retval;
}
-/*
- * function: zfcp_fsf_cleanup
- *
- * purpose: cleanup FSF operation for specified adapter
- *
- * returns: 0 - FSF operation successfully cleaned up
- * !0 - failed to cleanup FSF operation for this adapter
+/**
+ * zfcp_erp_adapter_strategy_close_fsf - stop FSF operations for an adapter
*/
-static int
+static void
zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *erp_action)
{
- int retval = ZFCP_ERP_SUCCEEDED;
struct zfcp_adapter *adapter = erp_action->adapter;
/*
@@ -2317,8 +2267,6 @@ zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *erp_action)
/* all ports and units are closed */
zfcp_erp_modify_adapter_status(adapter,
ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
-
- return retval;
}
/*
@@ -3293,10 +3241,8 @@ zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter,
}
-static int
-zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
+void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
{
- int retval = 0;
struct zfcp_port *port;
debug_text_event(adapter->erp_dbf, 5, "a_actab");
@@ -3305,14 +3251,10 @@ zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
else
list_for_each_entry(port, &adapter->port_list_head, list)
zfcp_erp_action_dismiss_port(port);
-
- return retval;
}
-static int
-zfcp_erp_action_dismiss_port(struct zfcp_port *port)
+static void zfcp_erp_action_dismiss_port(struct zfcp_port *port)
{
- int retval = 0;
struct zfcp_unit *unit;
struct zfcp_adapter *adapter = port->adapter;
@@ -3323,22 +3265,16 @@ zfcp_erp_action_dismiss_port(struct zfcp_port *port)
else
list_for_each_entry(unit, &port->unit_list_head, list)
zfcp_erp_action_dismiss_unit(unit);
-
- return retval;
}
-static int
-zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit)
+static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit)
{
- int retval = 0;
struct zfcp_adapter *adapter = unit->port->adapter;
debug_text_event(adapter->erp_dbf, 5, "u_actab");
debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t));
if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status))
zfcp_erp_action_dismiss(&unit->erp_action);
-
- return retval;
}
static inline void
diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
index d02366004cd..146d7a2b4c4 100644
--- a/drivers/s390/scsi/zfcp_ext.h
+++ b/drivers/s390/scsi/zfcp_ext.h
@@ -63,7 +63,6 @@ extern int zfcp_qdio_allocate_queues(struct zfcp_adapter *);
extern void zfcp_qdio_free_queues(struct zfcp_adapter *);
extern int zfcp_qdio_determine_pci(struct zfcp_qdio_queue *,
struct zfcp_fsf_req *);
-extern int zfcp_qdio_reqid_check(struct zfcp_adapter *, void *);
extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_req
(struct zfcp_fsf_req *, int, int);
@@ -140,6 +139,7 @@ extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, u32, int);
extern int zfcp_erp_adapter_reopen(struct zfcp_adapter *, int);
extern int zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int);
extern void zfcp_erp_adapter_failed(struct zfcp_adapter *);
+extern void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *);
extern void zfcp_erp_modify_port_status(struct zfcp_port *, u32, int);
extern int zfcp_erp_port_reopen(struct zfcp_port *, int);
@@ -156,7 +156,7 @@ extern void zfcp_erp_unit_failed(struct zfcp_unit *);
extern int zfcp_erp_thread_setup(struct zfcp_adapter *);
extern int zfcp_erp_thread_kill(struct zfcp_adapter *);
extern int zfcp_erp_wait(struct zfcp_adapter *);
-extern int zfcp_erp_async_handler(struct zfcp_erp_action *, unsigned long);
+extern void zfcp_erp_async_handler(struct zfcp_erp_action *, unsigned long);
extern int zfcp_test_link(struct zfcp_port *);
@@ -190,5 +190,10 @@ extern void zfcp_scsi_dbf_event_abort(const char *, struct zfcp_adapter *,
struct zfcp_fsf_req *);
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 31db2b06fab..ff2eacf5ec8 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -49,7 +49,6 @@ static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
static void zfcp_fsf_link_down_info_eval(struct zfcp_adapter *,
struct fsf_link_down_info *);
static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
-static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *);
/* association between FSF command and FSF QTCB type */
static u32 fsf_qtcb_type[] = {
@@ -146,47 +145,48 @@ zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
kfree(fsf_req);
}
-/*
- * function:
- *
- * purpose:
- *
- * returns:
- *
- * note: qdio queues shall be down (no ongoing inbound processing)
+/**
+ * zfcp_fsf_req_dismiss - dismiss a single fsf request
*/
-int
-zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
+static void zfcp_fsf_req_dismiss(struct zfcp_adapter *adapter,
+ struct zfcp_fsf_req *fsf_req,
+ unsigned int counter)
{
- struct zfcp_fsf_req *fsf_req, *tmp;
- unsigned long flags;
- LIST_HEAD(remove_queue);
+ u64 dbg_tmp[2];
- 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);
-
- list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
- list_del(&fsf_req->list);
- zfcp_fsf_req_dismiss(fsf_req);
- }
-
- return 0;
+ 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(&fsf_req->list);
+ fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
+ zfcp_fsf_req_complete(fsf_req);
}
-/*
- * function:
- *
- * purpose:
- *
- * returns:
+/**
+ * zfcp_fsf_req_dismiss_all - dismiss all remaining fsf requests
*/
-static void
-zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req)
+int zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
{
- fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
- zfcp_fsf_req_complete(fsf_req);
+ struct zfcp_fsf_req *request, *tmp;
+ unsigned long flags;
+ unsigned int i, counter;
+
+ spin_lock_irqsave(&adapter->req_list_lock, flags);
+ atomic_set(&adapter->reqs_active, 0);
+ for (i=0; i<REQUEST_LIST_SIZE; i++) {
+ if (list_empty(&adapter->req_list[i]))
+ continue;
+
+ counter = 0;
+ list_for_each_entry_safe(request, tmp,
+ &adapter->req_list[i], list) {
+ zfcp_fsf_req_dismiss(adapter, request, counter);
+ counter++;
+ }
+ }
+ spin_unlock_irqrestore(&adapter->req_list_lock, flags);
+
+ return 0;
}
/*
@@ -4592,12 +4592,14 @@ static inline void
zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
{
if (likely(fsf_req->qtcb != NULL)) {
- fsf_req->qtcb->prefix.req_seq_no = fsf_req->adapter->fsf_req_seq_no;
- fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
+ fsf_req->qtcb->prefix.req_seq_no =
+ fsf_req->adapter->fsf_req_seq_no;
+ fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
- fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_req->fsf_command];
+ fsf_req->qtcb->prefix.qtcb_type =
+ fsf_qtcb_type[fsf_req->fsf_command];
fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
- fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
+ fsf_req->qtcb->header.req_handle = fsf_req->req_id;
fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
}
}
@@ -4654,6 +4656,7 @@ zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req = NULL;
+ unsigned long flags;
int ret = 0;
struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
@@ -4668,6 +4671,12 @@ zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
fsf_req->adapter = adapter;
fsf_req->fsf_command = fsf_cmd;
+ INIT_LIST_HEAD(&fsf_req->list);
+
+ /* unique request id */
+ spin_lock_irqsave(&adapter->req_list_lock, flags);
+ fsf_req->req_id = adapter->req_no++;
+ spin_unlock_irqrestore(&adapter->req_list_lock, flags);
zfcp_fsf_req_qtcb_init(fsf_req);
@@ -4707,7 +4716,7 @@ zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
/* setup common SBALE fields */
- sbale[0].addr = fsf_req;
+ sbale[0].addr = (void *) fsf_req->req_id;
sbale[0].flags |= SBAL_FLAGS0_COMMAND;
if (likely(fsf_req->qtcb != NULL)) {
sbale[1].addr = (void *) fsf_req->qtcb;
@@ -4747,7 +4756,7 @@ zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
volatile struct qdio_buffer_element *sbale;
int inc_seq_no;
int new_distance_from_int;
- unsigned long flags;
+ u64 dbg_tmp[2];
int retval = 0;
adapter = fsf_req->adapter;
@@ -4761,10 +4770,10 @@ zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
sbale[1].length);
- /* put allocated FSF request at list tail */
- spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
- list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
- spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
+ /* put allocated FSF request into hash table */
+ spin_lock(&adapter->req_list_lock);
+ zfcp_reqlist_add(adapter, fsf_req);
+ spin_unlock(&adapter->req_list_lock);
inc_seq_no = (fsf_req->qtcb != NULL);
@@ -4803,6 +4812,10 @@ zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
QDIO_FLAG_SYNC_OUTPUT,
0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
+ dbg_tmp[0] = (unsigned long) sbale[0].addr;
+ dbg_tmp[1] = (u64) retval;
+ debug_event(adapter->erp_dbf, 4, (void *) dbg_tmp, 16);
+
if (unlikely(retval)) {
/* Queues are down..... */
retval = -EIO;
@@ -4812,22 +4825,17 @@ zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
*/
if (timer)
del_timer(timer);
- spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
- list_del(&fsf_req->list);
- 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
- */
+ spin_lock(&adapter->req_list_lock);
+ zfcp_reqlist_remove(adapter, fsf_req->req_id);
+ spin_unlock(&adapter->req_list_lock);
+ /* undo changes in request queue made for this request */
zfcp_qdio_zero_sbals(req_queue->buffer,
fsf_req->sbal_first, fsf_req->sbal_number);
atomic_add(fsf_req->sbal_number, &req_queue->free_count);
- req_queue->free_index -= fsf_req->sbal_number; /* increase */
+ req_queue->free_index -= fsf_req->sbal_number;
req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
- ZFCP_LOG_DEBUG
- ("error: do_QDIO failed. Buffers could not be enqueued "
- "to request queue.\n");
+ zfcp_erp_adapter_reopen(adapter, 0);
} else {
req_queue->distance_from_int = new_distance_from_int;
/*
@@ -4843,7 +4851,7 @@ zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
adapter->fsf_req_seq_no++;
/* count FSF requests pending */
- atomic_inc(&adapter->fsf_reqs_active);
+ atomic_inc(&adapter->reqs_active);
}
return retval;
}
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index 49ea5add4ab..dbd9f48e863 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -282,6 +282,37 @@ zfcp_qdio_request_handler(struct ccw_device *ccw_device,
return;
}
+/**
+ * zfcp_qdio_reqid_check - checks for valid reqids or unsolicited status
+ */
+static int zfcp_qdio_reqid_check(struct zfcp_adapter *adapter,
+ unsigned long req_id)
+{
+ struct zfcp_fsf_req *fsf_req;
+ unsigned long flags;
+
+ 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);
+
+ if (!fsf_req) {
+ spin_unlock_irqrestore(&adapter->req_list_lock, flags);
+ ZFCP_LOG_NORMAL("error: unknown request id (%ld).\n", req_id);
+ zfcp_erp_adapter_reopen(adapter, 0);
+ return -EINVAL;
+ }
+
+ zfcp_reqlist_remove(adapter, req_id);
+ atomic_dec(&adapter->reqs_active);
+ spin_unlock_irqrestore(&adapter->req_list_lock, flags);
+
+ /* finish the FSF request */
+ zfcp_fsf_req_complete(fsf_req);
+
+ return 0;
+}
+
/*
* function: zfcp_qdio_response_handler
*
@@ -344,7 +375,7 @@ zfcp_qdio_response_handler(struct ccw_device *ccw_device,
/* look for QDIO request identifiers in SB */
buffere = &buffer->element[buffere_index];
retval = zfcp_qdio_reqid_check(adapter,
- (void *) buffere->addr);
+ (unsigned long) buffere->addr);
if (retval) {
ZFCP_LOG_NORMAL("bug: unexpected inbound "
@@ -415,52 +446,6 @@ zfcp_qdio_response_handler(struct ccw_device *ccw_device,
return;
}
-/*
- * function: zfcp_qdio_reqid_check
- *
- * purpose: checks for valid reqids or unsolicited status
- *
- * returns: 0 - valid request id or unsolicited status
- * !0 - otherwise
- */
-int
-zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, void *sbale_addr)
-{
- struct zfcp_fsf_req *fsf_req;
- unsigned long flags;
-
- /* invalid (per convention used in this driver) */
- if (unlikely(!sbale_addr)) {
- ZFCP_LOG_NORMAL("bug: invalid reqid\n");
- 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_irqsave(&adapter->fsf_req_list_lock, flags);
- if (list_empty(&adapter->fsf_req_list_head)) {
- spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
- return 0;
- }
- list_del(&fsf_req->list);
- atomic_dec(&adapter->fsf_reqs_active);
- spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
-
- 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);
- return -EINVAL;
- }
-
- /* finish the FSF request */
- zfcp_fsf_req_complete(fsf_req);
-
- return 0;
-}
-
/**
* zfcp_qdio_sbale_get - return pointer to SBALE of qdio_queue
* @queue: queue from which SBALE should be returned
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index 671f4a6a5d1..1bb55086db9 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -30,7 +30,6 @@ static int zfcp_scsi_queuecommand(struct scsi_cmnd *,
void (*done) (struct scsi_cmnd *));
static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *);
static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *);
-static int zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *);
static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *);
static int zfcp_task_management_function(struct zfcp_unit *, u8,
struct scsi_cmnd *);
@@ -46,30 +45,22 @@ struct zfcp_data zfcp_data = {
.scsi_host_template = {
.name = ZFCP_NAME,
.proc_name = "zfcp",
- .proc_info = NULL,
- .detect = NULL,
.slave_alloc = zfcp_scsi_slave_alloc,
.slave_configure = zfcp_scsi_slave_configure,
.slave_destroy = zfcp_scsi_slave_destroy,
.queuecommand = zfcp_scsi_queuecommand,
.eh_abort_handler = zfcp_scsi_eh_abort_handler,
.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
- .eh_bus_reset_handler = zfcp_scsi_eh_bus_reset_handler,
+ .eh_bus_reset_handler = zfcp_scsi_eh_host_reset_handler,
.eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
.can_queue = 4096,
.this_id = -1,
- /*
- * FIXME:
- * one less? can zfcp_create_sbale cope with it?
- */
.sg_tablesize = ZFCP_MAX_SBALES_PER_REQ,
.cmd_per_lun = 1,
- .unchecked_isa_dma = 0,
.use_clustering = 1,
.sdev_attrs = zfcp_sysfs_sdev_attrs,
},
.driver_version = ZFCP_VERSION,
- /* rest initialised with zeros */
};
/* Find start of Response Information in FCP response unit*/
@@ -176,8 +167,14 @@ zfcp_scsi_slave_alloc(struct scsi_device *sdp)
return retval;
}
-static void
-zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
+/**
+ * zfcp_scsi_slave_destroy - called when scsi device is removed
+ *
+ * Remove reference to associated scsi device for an zfcp_unit.
+ * Mark zfcp_unit as failed. The scsi device might be deleted via sysfs
+ * or a scan for this device might have failed.
+ */
+static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
{
struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
@@ -185,6 +182,7 @@ zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status);
sdpnt->hostdata = NULL;
unit->device = NULL;
+ zfcp_erp_unit_failed(unit);
zfcp_unit_put(unit);
} else {
ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at "
@@ -549,35 +547,38 @@ zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags,
}
/**
- * zfcp_scsi_eh_bus_reset_handler - reset bus (reopen adapter)
+ * zfcp_scsi_eh_host_reset_handler - handler for host and bus reset
+ *
+ * If ERP is already running it will be stopped.
*/
-int
-zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *scpnt)
+int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
{
- struct zfcp_unit *unit = (struct zfcp_unit*) scpnt->device->hostdata;
- struct zfcp_adapter *adapter = unit->port->adapter;
-
- ZFCP_LOG_NORMAL("bus reset because of problems with "
- "unit 0x%016Lx\n", unit->fcp_lun);
- zfcp_erp_adapter_reopen(adapter, 0);
- zfcp_erp_wait(adapter);
-
- return SUCCESS;
-}
+ struct zfcp_unit *unit;
+ struct zfcp_adapter *adapter;
+ unsigned long flags;
-/**
- * zfcp_scsi_eh_host_reset_handler - reset host (reopen adapter)
- */
-int
-zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
-{
- struct zfcp_unit *unit = (struct zfcp_unit*) scpnt->device->hostdata;
- struct zfcp_adapter *adapter = unit->port->adapter;
+ unit = (struct zfcp_unit*) scpnt->device->hostdata;
+ adapter = unit->port->adapter;
- ZFCP_LOG_NORMAL("host reset because of problems with "
+ ZFCP_LOG_NORMAL("host/bus reset because of problems with "
"unit 0x%016Lx\n", unit->fcp_lun);
- zfcp_erp_adapter_reopen(adapter, 0);
- zfcp_erp_wait(adapter);
+
+ write_lock_irqsave(&adapter->erp_lock, flags);
+ if (atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
+ &adapter->status)) {
+ zfcp_erp_modify_adapter_status(adapter,
+ ZFCP_STATUS_COMMON_UNBLOCKED|ZFCP_STATUS_COMMON_OPEN,
+ ZFCP_CLEAR);
+ zfcp_erp_action_dismiss_adapter(adapter);
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
+ zfcp_fsf_req_dismiss_all(adapter);
+ adapter->fsf_req_seq_no = 0;
+ zfcp_erp_adapter_reopen(adapter, 0);
+ } else {
+ write_unlock_irqrestore(&adapter->erp_lock, flags);
+ zfcp_erp_adapter_reopen(adapter, 0);
+ zfcp_erp_wait(adapter);
+ }
return SUCCESS;
}