[patch 01/11] zfcp: Remove function zfcp_reqlist_find_safe

Christof Schmitt
2010-02-17T10:20:22Z

[-- Attachment #1: 700-zfcp-remove-fn.diff --]
[-- Type: text/plain, Size: 8415 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

Always use the FSF request id as a reference to the FSF request. With
this change the function zfcp_reqlist_find_safe is no longer needed
and can be removed.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

drivers/s390/scsi/zfcp_dbf.c | 2 +-
drivers/s390/scsi/zfcp_def.h | 17 +----------------
drivers/s390/scsi/zfcp_erp.c | 17 +++++++++--------
drivers/s390/scsi/zfcp_fsf.c | 34 ++++++++++++++++++----------------
4 files changed, 29 insertions(+), 41 deletions(-)

diff -urpN linux-2.6/drivers/s390/scsi/zfcp_dbf.c linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.c
--- linux-2.6/drivers/s390/scsi/zfcp_dbf.c 2010-02-16 09:43:05.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.c 2010-02-16 09:43:28.000000000 +0100
@@ -668,7 +668,7 @@ void zfcp_dbf_rec_action(char *id2, stru
r->u.action.action = (unsigned long)erp_action;
r->u.action.status = erp_action->status;
r->u.action.step = erp_action->step;
- r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
+ r->u.action.fsf_req = erp_action->fsf_req_id;
debug_event(dbf->rec, 5, r, sizeof(*r));
spin_unlock_irqrestore(&dbf->rec_lock, flags);
}
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_def.h linux-2.6-patched/drivers/s390/scsi/zfcp_def.h
--- linux-2.6/drivers/s390/scsi/zfcp_def.h 2010-02-16 09:43:05.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_def.h 2010-02-16 09:43:28.000000000 +0100
@@ -143,8 +143,7 @@ struct zfcp_erp_action {
struct zfcp_unit *unit;
u32 status; /* recovery status */
u32 step; /* active step of this erp action */
- struct zfcp_fsf_req *fsf_req; /* fsf request currently pending
- for this action */
+ unsigned long fsf_req_id;
struct timer_list timer;
};

@@ -379,18 +378,4 @@ zfcp_reqlist_find(struct zfcp_adapter *a
return NULL;
}

-static inline struct zfcp_fsf_req *
-zfcp_reqlist_find_safe(struct zfcp_adapter *adapter, struct zfcp_fsf_req *req)
-{
- struct zfcp_fsf_req *request;
- unsigned int idx;
-
- for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) {
- list_for_each_entry(request, &adapter->req_list[idx], list)
- if (request == req)
- return request;
- }
- return NULL;
-}
-
#endif /* ZFCP_DEF_H */
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_erp.c linux-2.6-patched/drivers/s390/scsi/zfcp_erp.c
--- linux-2.6/drivers/s390/scsi/zfcp_erp.c 2010-02-16 09:43:05.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_erp.c 2010-02-16 09:43:28.000000000 +0100
@@ -478,25 +478,26 @@ static void zfcp_erp_action_to_running(s
static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
+ struct zfcp_fsf_req *req;

- if (!act->fsf_req)
+ if (!act->fsf_req_id)
return;

spin_lock(&adapter->req_list_lock);
- if (zfcp_reqlist_find_safe(adapter, act->fsf_req) &&
- act->fsf_req->erp_action == act) {
+ req = zfcp_reqlist_find(adapter, act->fsf_req_id);
+ if (req && req->erp_action == act) {
if (act->status & (ZFCP_STATUS_ERP_DISMISSED |
ZFCP_STATUS_ERP_TIMEDOUT)) {
- act->fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
+ req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
zfcp_dbf_rec_action("erscf_1", act);
- act->fsf_req->erp_action = NULL;
+ req->erp_action = NULL;
}
if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
zfcp_dbf_rec_action("erscf_2", act);
- if (act->fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED)
- act->fsf_req = NULL;
+ if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED)
+ act->fsf_req_id = 0;
} else
- act->fsf_req = NULL;
+ act->fsf_req_id = 0;
spin_unlock(&adapter->req_list_lock);
}

diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fsf.c linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c
--- linux-2.6/drivers/s390/scsi/zfcp_fsf.c 2010-02-16 09:43:05.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c 2010-02-16 09:43:28.000000000 +0100
@@ -773,10 +773,11 @@ static int zfcp_fsf_req_send(struct zfcp
unsigned long flags;
int idx;
int with_qtcb = (req->qtcb != NULL);
+ int req_id = req->req_id;

/* put allocated FSF request into hash table */
spin_lock_irqsave(&adapter->req_list_lock, flags);
- idx = zfcp_reqlist_hash(req->req_id);
+ idx = zfcp_reqlist_hash(req_id);
list_add_tail(&req->list, &adapter->req_list[idx]);
spin_unlock_irqrestore(&adapter->req_list_lock, flags);

@@ -786,7 +787,8 @@ static int zfcp_fsf_req_send(struct zfcp
del_timer(&req->timer);
spin_lock_irqsave(&adapter->req_list_lock, flags);
/* lookup request again, list might have changed */
- if (zfcp_reqlist_find_safe(adapter, req))
+ req = zfcp_reqlist_find(adapter, req_id);
+ if (req)
zfcp_reqlist_remove(adapter, req);
spin_unlock_irqrestore(&adapter->req_list_lock, flags);
zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
@@ -1262,13 +1264,13 @@ int zfcp_fsf_exchange_config_data(struct
FSF_FEATURE_UPDATE_ALERT;
req->erp_action = erp_action;
req->handler = zfcp_fsf_exchange_config_data_handler;
- erp_action->fsf_req = req;
+ erp_action->fsf_req_id = req->req_id;

zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
- erp_action->fsf_req = NULL;
+ erp_action->fsf_req_id = 0;
}
out:
spin_unlock_bh(&qdio->req_q_lock);
@@ -1355,13 +1357,13 @@ int zfcp_fsf_exchange_port_data(struct z

req->handler = zfcp_fsf_exchange_port_data_handler;
req->erp_action = erp_action;
- erp_action->fsf_req = req;
+ erp_action->fsf_req_id = req->req_id;

zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
- erp_action->fsf_req = NULL;
+ erp_action->fsf_req_id = 0;
}
out:
spin_unlock_bh(&qdio->req_q_lock);
@@ -1521,14 +1523,14 @@ int zfcp_fsf_open_port(struct zfcp_erp_a
hton24(req->qtcb->bottom.support.d_id, port->d_id);
req->data = port;
req->erp_action = erp_action;
- erp_action->fsf_req = req;
+ erp_action->fsf_req_id = req->req_id;
get_device(&port->sysfs_device);

zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
- erp_action->fsf_req = NULL;
+ erp_action->fsf_req_id = 0;
put_device(&port->sysfs_device);
}
out:
@@ -1591,13 +1593,13 @@ int zfcp_fsf_close_port(struct zfcp_erp_
req->data = erp_action->port;
req->erp_action = erp_action;
req->qtcb->header.port_handle = erp_action->port->handle;
- erp_action->fsf_req = req;
+ erp_action->fsf_req_id = req->req_id;

zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
- erp_action->fsf_req = NULL;
+ erp_action->fsf_req_id = 0;
}
out:
spin_unlock_bh(&qdio->req_q_lock);
@@ -1817,13 +1819,13 @@ int zfcp_fsf_close_physical_port(struct
req->qtcb->header.port_handle = erp_action->port->handle;
req->erp_action = erp_action;
req->handler = zfcp_fsf_close_physical_port_handler;
- erp_action->fsf_req = req;
+ erp_action->fsf_req_id = req->req_id;

zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
- erp_action->fsf_req = NULL;
+ erp_action->fsf_req_id = 0;
}
out:
spin_unlock_bh(&qdio->req_q_lock);
@@ -1991,7 +1993,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_a
req->handler = zfcp_fsf_open_unit_handler;
req->data = erp_action->unit;
req->erp_action = erp_action;
- erp_action->fsf_req = req;
+ erp_action->fsf_req_id = req->req_id;

if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
@@ -2000,7 +2002,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_a
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
- erp_action->fsf_req = NULL;
+ erp_action->fsf_req_id = 0;
}
out:
spin_unlock_bh(&qdio->req_q_lock);
@@ -2077,13 +2079,13 @@ int zfcp_fsf_close_unit(struct zfcp_erp_
req->handler = zfcp_fsf_close_unit_handler;
req->data = erp_action->unit;
req->erp_action = erp_action;
- erp_action->fsf_req = req;
+ erp_action->fsf_req_id = req->req_id;

zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
- erp_action->fsf_req = NULL;
+ erp_action->fsf_req_id = 0;
}
out:
spin_unlock_bh(&qdio->req_q_lock);