RDMA/qedr: Fix some error handling

'qedr_alloc_pbl_tbl()' can not return NULL.

In qedr_init_user_queue():
 - simplify the test for the return value, no need to test for NULL
 - propagate the error pointer if needed, otherwise 0 (success) is returned.
   This is spurious.

In init_mr_info():
 - test the return value with IS_ERR
 - propagate the error pointer if needed instead of an exlictit -ENOMEM.
   This is a no-op as the only error pointer that we can have here is
   already -ENOMEM

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index ef83a3f322d6e8a01723287a26afc61df7e7fb03..0c51657af151c02e8cae67bdedca882232d05fff 100644 (file)
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -771,8 +771,10 @@ static inline int qedr_init_user_queue(struct ib_ucontext *ib_ctx,
                goto err0;
 
        q->pbl_tbl = qedr_alloc_pbl_tbl(dev, &q->pbl_info, GFP_KERNEL);
-       if (IS_ERR_OR_NULL(q->pbl_tbl))
+       if (IS_ERR(q->pbl_tbl)) {
+               rc = PTR_ERR(q->pbl_tbl);
                goto err0;
+       }
 
        qedr_populate_pbls(dev, q->umem, q->pbl_tbl, &q->pbl_info);
 
@@ -2105,8 +2107,8 @@ static int init_mr_info(struct qedr_dev *dev, struct mr_info *info,
                goto done;
 
        info->pbl_table = qedr_alloc_pbl_tbl(dev, &info->pbl_info, GFP_KERNEL);
-       if (!info->pbl_table) {
-               rc = -ENOMEM;
+       if (IS_ERR(info->pbl_table)) {
+               rc = PTR_ERR(info->pbl_table);
                goto done;
        }
 
@@ -2117,7 +2119,7 @@ static int init_mr_info(struct qedr_dev *dev, struct mr_info *info,
         * list and allocating another one
         */
        tmp = qedr_alloc_pbl_tbl(dev, &info->pbl_info, GFP_KERNEL);
-       if (!tmp) {
+       if (IS_ERR(tmp)) {
                DP_DEBUG(dev, QEDR_MSG_MR, "Extra PBL is not allocated\n");
                goto done;
        }