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path: root/drivers/infiniband/hw/ipath/ipath_qp.c
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Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_qp.c')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_qp.c52
1 files changed, 30 insertions, 22 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_qp.c b/drivers/infiniband/hw/ipath/ipath_qp.c
index 16db9ac0b402..bfef08ecd342 100644
--- a/drivers/infiniband/hw/ipath/ipath_qp.c
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c
@@ -844,34 +844,36 @@ struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
* See ipath_mmap() for details.
*/
if (udata && udata->outlen >= sizeof(__u64)) {
- struct ipath_mmap_info *ip;
- __u64 offset = (__u64) qp->r_rq.wq;
int err;
- err = ib_copy_to_udata(udata, &offset, sizeof(offset));
- if (err) {
- ret = ERR_PTR(err);
- goto bail_rwq;
- }
+ if (!qp->r_rq.wq) {
+ __u64 offset = 0;
- if (qp->r_rq.wq) {
- /* Allocate info for ipath_mmap(). */
- ip = kmalloc(sizeof(*ip), GFP_KERNEL);
- if (!ip) {
+ err = ib_copy_to_udata(udata, &offset,
+ sizeof(offset));
+ if (err) {
+ ret = ERR_PTR(err);
+ goto bail_rwq;
+ }
+ } else {
+ u32 s = sizeof(struct ipath_rwq) +
+ qp->r_rq.size * sz;
+
+ qp->ip =
+ ipath_create_mmap_info(dev, s,
+ ibpd->uobject->context,
+ qp->r_rq.wq);
+ if (!qp->ip) {
ret = ERR_PTR(-ENOMEM);
goto bail_rwq;
}
- qp->ip = ip;
- ip->context = ibpd->uobject->context;
- ip->obj = qp->r_rq.wq;
- kref_init(&ip->ref);
- ip->mmap_cnt = 0;
- ip->size = PAGE_ALIGN(sizeof(struct ipath_rwq) +
- qp->r_rq.size * sz);
- spin_lock_irq(&dev->pending_lock);
- ip->next = dev->pending_mmaps;
- dev->pending_mmaps = ip;
- spin_unlock_irq(&dev->pending_lock);
+
+ err = ib_copy_to_udata(udata, &(qp->ip->offset),
+ sizeof(qp->ip->offset));
+ if (err) {
+ ret = ERR_PTR(err);
+ goto bail_ip;
+ }
}
}
@@ -885,6 +887,12 @@ struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
dev->n_qps_allocated++;
spin_unlock(&dev->n_qps_lock);
+ if (qp->ip) {
+ spin_lock_irq(&dev->pending_lock);
+ list_add(&qp->ip->pending_mmaps, &dev->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+ }
+
ret = &qp->ibqp;
goto bail;