[openib-general] SRP: [PATCH] Misc cleanups in ib_srp
Ishai Rabinovitz
ishai at mellanox.co.il
Sun Jun 4 02:43:22 PDT 2006
Hi,
Misc cleanups in ib_srp. Please consider for 2.6.18.
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.
3) We can use list_move_tail in srp_remove_req.
Signed-off-by: Ishai Rabinovitz <ishai at mellanox.co.il>
Index: last_stable/drivers/infiniband/ulp/srp/ib_srp.c
===================================================================
--- last_stable.orig/drivers/infiniband/ulp/srp/ib_srp.c 2006-05-19 11:14:35.000000000 +0300
+++ last_stable/drivers/infiniband/ulp/srp/ib_srp.c 2006-05-21 17:41:25.000000000 +0300
@@ -451,14 +451,26 @@ static void srp_unmap_data(struct scsi_c
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) {
@@ -494,19 +506,12 @@ static int srp_reconnect_target(struct s
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)
@@ -706,13 +711,6 @@ static int srp_map_data(struct scsi_cmnd
return len;
}
-static void srp_remove_req(struct srp_target_port *target, struct srp_request *req)
-{
- srp_unmap_data(req->scmnd, target, req);
- list_del(&req->list);
- list_add_tail(&req->list, &target->free_reqs);
-}
-
static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp)
{
struct srp_request *req;
@@ -1349,11 +1347,8 @@ static int srp_reset_device(struct scsi_
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);
--
Ishai Rabinovitz
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