IB/ehca: Remove tgid checking

Pavel Emelyanov <xemul@openvz.org> mentioned in <http://lkml.org/lkml/2008/3/17/131>
that the task_struct->tgid field is about to become deprecated, so the
uses in the ehca driver need to be fixed up.

However, all the uses in ehca are for some object ownership checking
that is not really needed, and anyway is implementing a policy that
should be in common code rather than a low-level driver.  So just
remove all the checks.

Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 0 insertions, 48 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index 1012f15..a9fd419 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -43,9 +43,6 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-
-#include <asm/current.h>
-
 #include "ehca_classes.h"
 #include "ehca_tools.h"
 #include "ehca_qes.h"
@@ -1526,16 +1523,6 @@ int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
 	struct ehca_shca *shca = container_of(ibqp->device, struct ehca_shca,
 					      ib_device);
 	struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
-	struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
-					     ib_pd);
-	u32 cur_pid = current->tgid;
-
-	if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
-	    my_pd->ownpid != cur_pid) {
-		ehca_err(ibqp->pd->device, "Invalid caller pid=%x ownpid=%x",
-			 cur_pid, my_pd->ownpid);
-		return -EINVAL;
-	}
 
 	/* The if-block below caches qp_attr to be modified for GSI and SMI
 	 * qps during the initialization by ib_mad. When the respective port
@@ -1636,23 +1623,13 @@ int ehca_query_qp(struct ib_qp *qp,
 		  int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
 {
 	struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
-	struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
-					     ib_pd);
 	struct ehca_shca *shca = container_of(qp->device, struct ehca_shca,
 					      ib_device);
 	struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
 	struct hcp_modify_qp_control_block *qpcb;
-	u32 cur_pid = current->tgid;
 	int cnt, ret = 0;
 	u64 h_ret;
 
-	if (my_pd->ib_pd.uobject  && my_pd->ib_pd.uobject->context  &&
-	    my_pd->ownpid != cur_pid) {
-		ehca_err(qp->device, "Invalid caller pid=%x ownpid=%x",
-			 cur_pid, my_pd->ownpid);
-		return -EINVAL;
-	}
-
 	if (qp_attr_mask & QP_ATTR_QUERY_NOT_SUPPORTED) {
 		ehca_err(qp->device, "Invalid attribute mask "
 			 "ehca_qp=%p qp_num=%x qp_attr_mask=%x ",
@@ -1797,8 +1774,6 @@ int ehca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
 {
 	struct ehca_qp *my_qp =
 		container_of(ibsrq, struct ehca_qp, ib_srq);
-	struct ehca_pd *my_pd =
-		container_of(ibsrq->pd, struct ehca_pd, ib_pd);
 	struct ehca_shca *shca =
 		container_of(ibsrq->pd->device, struct ehca_shca, ib_device);
 	struct hcp_modify_qp_control_block *mqpcb;
@@ -1806,14 +1781,6 @@ int ehca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
 	u64 h_ret;
 	int ret = 0;
 
-	u32 cur_pid = current->tgid;
-	if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
-	    my_pd->ownpid != cur_pid) {
-		ehca_err(ibsrq->pd->device, "Invalid caller pid=%x ownpid=%x",
-			 cur_pid, my_pd->ownpid);
-		return -EINVAL;
-	}
-
 	mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 	if (!mqpcb) {
 		ehca_err(ibsrq->device, "Could not get zeroed page for mqpcb "
@@ -1864,22 +1831,13 @@ modify_srq_exit0:
 int ehca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr)
 {
 	struct ehca_qp *my_qp = container_of(srq, struct ehca_qp, ib_srq);
-	struct ehca_pd *my_pd = container_of(srq->pd, struct ehca_pd, ib_pd);
 	struct ehca_shca *shca = container_of(srq->device, struct ehca_shca,
 					      ib_device);
 	struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
 	struct hcp_modify_qp_control_block *qpcb;
-	u32 cur_pid = current->tgid;
 	int ret = 0;
 	u64 h_ret;
 
-	if (my_pd->ib_pd.uobject  && my_pd->ib_pd.uobject->context  &&
-	    my_pd->ownpid != cur_pid) {
-		ehca_err(srq->device, "Invalid caller pid=%x ownpid=%x",
-			 cur_pid, my_pd->ownpid);
-		return -EINVAL;
-	}
-
 	qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 	if (!qpcb) {
 		ehca_err(srq->device, "Out of memory for qpcb "
@@ -1919,7 +1877,6 @@ static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
 	struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
 					     ib_pd);
 	struct ehca_sport *sport = &shca->sport[my_qp->init_attr.port_num - 1];
-	u32 cur_pid = current->tgid;
 	u32 qp_num = my_qp->real_qp_num;
 	int ret;
 	u64 h_ret;
@@ -1934,11 +1891,6 @@ static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
 				 "user space qp_num=%x", qp_num);
 			return -EINVAL;
 		}
-		if (my_pd->ownpid != cur_pid) {
-			ehca_err(dev, "Invalid caller pid=%x ownpid=%x",
-				 cur_pid, my_pd->ownpid);
-			return -EINVAL;
-		}
 	}
 
 	if (my_qp->send_cq) {