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IB/srp: Factor out common request reset code 

Misc cleanups in ib_srp:
1) I think that it is more efficient to move the req entries from req_list
   to free_list in srp_reconnect_target (rather than rebuild the free_list).
   (In any case this code is shorter).
2) This allows us to reuse code in srp_reset_device and srp_reconnect_target
   and call a new function srp_reset_req.

Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ishai Rabinovitz 2006-06-17 20:37:38 -07:00 committed by Roland Dreier
parent 0c0450db31
commit 526b4caa0a
1 changed files with 18 additions and 22 deletions
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40
drivers/infiniband/ulp/srp/ib_srp.c
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@ -471,14 +471,26 @@ static void srp_unmap_data(struct scsi_cmnd *scmnd,
scmnd->sc_data_direction);
}
static void srp_remove_req(struct srp_target_port *target, struct srp_request *req)
{
srp_unmap_data(req->scmnd, target, req);
list_move_tail(&req->list, &target->free_reqs);
}
static void srp_reset_req(struct srp_target_port *target, struct srp_request *req)
{
req->scmnd->result = DID_RESET << 16;
req->scmnd->scsi_done(req->scmnd);
srp_remove_req(target, req);
}
static int srp_reconnect_target(struct srp_target_port *target)
{
struct ib_cm_id *new_cm_id;
struct ib_qp_attr qp_attr;
struct srp_request *req;
struct srp_request *req, *tmp;
struct ib_wc wc;
int ret;
int i;
spin_lock_irq(target->scsi_host->host_lock);
if (target->state != SRP_TARGET_LIVE) {
@ -514,19 +526,12 @@ static int srp_reconnect_target(struct srp_target_port *target)
while (ib_poll_cq(target->cq, 1, &wc) > 0)
; /* nothing */
list_for_each_entry(req, &target->req_queue, list) {
req->scmnd->result = DID_RESET << 16;
req->scmnd->scsi_done(req->scmnd);
srp_unmap_data(req->scmnd, target, req);
}
list_for_each_entry_safe(req, tmp, &target->req_queue, list)
srp_reset_req(target, req);
target->rx_head = 0;
target->tx_head = 0;
target->tx_tail = 0;
INIT_LIST_HEAD(&target->free_reqs);
INIT_LIST_HEAD(&target->req_queue);
for (i = 0; i < SRP_SQ_SIZE; ++i)
list_add_tail(&target->req_ring[i].list, &target->free_reqs);
ret = srp_connect_target(target);
if (ret)
@ -726,12 +731,6 @@ static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target,
return len;
}
static void srp_remove_req(struct srp_target_port *target, struct srp_request *req)
{
srp_unmap_data(req->scmnd, target, req);
list_move_tail(&req->list, &target->free_reqs);
}
static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp)
{
struct srp_request *req;
@ -1348,11 +1347,8 @@ static int srp_reset_device(struct scsi_cmnd *scmnd)
spin_lock_irq(target->scsi_host->host_lock);
list_for_each_entry_safe(req, tmp, &target->req_queue, list)
if (req->scmnd->device == scmnd->device) {
req->scmnd->result = DID_RESET << 16;
req->scmnd->scsi_done(req->scmnd);
srp_remove_req(target, req);
}
if (req->scmnd->device == scmnd->device)
srp_reset_req(target, req);
spin_unlock_irq(target->scsi_host->host_lock);