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IB/core: refactor ib_create_qp 

Split the XRC magic into a separate function, and return early on failure
to make the initialization code readable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Christoph Hellwig 2016-05-03 18:01:06 +02:00 committed by Doug Ledford
parent 002516edf5
commit 04c41bf39f
1 changed files with 51 additions and 46 deletions
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97
drivers/infiniband/core/verbs.c
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@ -723,62 +723,67 @@ struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
} }
EXPORT_SYMBOL(ib_open_qp); EXPORT_SYMBOL(ib_open_qp);
static struct ib_qp *ib_create_xrc_qp(struct ib_qp *qp,
struct ib_qp_init_attr *qp_init_attr)
{
struct ib_qp *real_qp = qp;
qp->event_handler = __ib_shared_qp_event_handler;
qp->qp_context = qp;
qp->pd = NULL;
qp->send_cq = qp->recv_cq = NULL;
qp->srq = NULL;
qp->xrcd = qp_init_attr->xrcd;
atomic_inc(&qp_init_attr->xrcd->usecnt);
INIT_LIST_HEAD(&qp->open_list);
qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
qp_init_attr->qp_context);
if (!IS_ERR(qp))
__ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
else
real_qp->device->destroy_qp(real_qp);
return qp;
}
struct ib_qp *ib_create_qp(struct ib_pd *pd, struct ib_qp *ib_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *qp_init_attr) struct ib_qp_init_attr *qp_init_attr)
{ {
struct ib_qp *qp, *real_qp; struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
struct ib_device *device; struct ib_qp *qp;
device = pd ? pd->device : qp_init_attr->xrcd->device;
qp = device->create_qp(pd, qp_init_attr, NULL); qp = device->create_qp(pd, qp_init_attr, NULL);
if (IS_ERR(qp))
return qp;
if (!IS_ERR(qp)) { qp->device = device;
qp->device = device; qp->real_qp = qp;
qp->real_qp = qp; qp->uobject = NULL;
qp->uobject = NULL; qp->qp_type = qp_init_attr->qp_type;
qp->qp_type = qp_init_attr->qp_type;
atomic_set(&qp->usecnt, 0); atomic_set(&qp->usecnt, 0);
if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) { if (qp_init_attr->qp_type == IB_QPT_XRC_TGT)
qp->event_handler = __ib_shared_qp_event_handler; return ib_create_xrc_qp(qp, qp_init_attr);
qp->qp_context = qp;
qp->pd = NULL;
qp->send_cq = qp->recv_cq = NULL;
qp->srq = NULL;
qp->xrcd = qp_init_attr->xrcd;
atomic_inc(&qp_init_attr->xrcd->usecnt);
INIT_LIST_HEAD(&qp->open_list);
real_qp = qp; qp->event_handler = qp_init_attr->event_handler;
qp = __ib_open_qp(real_qp, qp_init_attr->event_handler, qp->qp_context = qp_init_attr->qp_context;
qp_init_attr->qp_context); if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
if (!IS_ERR(qp)) qp->recv_cq = NULL;
__ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp); qp->srq = NULL;
else } else {
real_qp->device->destroy_qp(real_qp); qp->recv_cq = qp_init_attr->recv_cq;
} else { atomic_inc(&qp_init_attr->recv_cq->usecnt);
qp->event_handler = qp_init_attr->event_handler; qp->srq = qp_init_attr->srq;
qp->qp_context = qp_init_attr->qp_context; if (qp->srq)
if (qp_init_attr->qp_type == IB_QPT_XRC_INI) { atomic_inc(&qp_init_attr->srq->usecnt);
qp->recv_cq = NULL;
qp->srq = NULL;
} else {
qp->recv_cq = qp_init_attr->recv_cq;
atomic_inc(&qp_init_attr->recv_cq->usecnt);
qp->srq = qp_init_attr->srq;
if (qp->srq)
atomic_inc(&qp_init_attr->srq->usecnt);
}
qp->pd = pd;
qp->send_cq = qp_init_attr->send_cq;
qp->xrcd = NULL;
atomic_inc(&pd->usecnt);
atomic_inc(&qp_init_attr->send_cq->usecnt);
}
} }
qp->pd = pd;
qp->send_cq = qp_init_attr->send_cq;
qp->xrcd = NULL;
atomic_inc(&pd->usecnt);
atomic_inc(&qp_init_attr->send_cq->usecnt);
return qp; return qp;
} }
EXPORT_SYMBOL(ib_create_qp); EXPORT_SYMBOL(ib_create_qp);