[PATCH v2 for-next 3/3] RDMA/irdma: Do not request 2-level PBLEs for CQ alloc

[Shiraz Saleem <shiraz.saleem@xxxxxxxxx>]

From: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>

When allocating PBLE's for a large CQ, it is possible
that a 2-level PBLE is returned which would cause the
CQ allocation to fail since 1-level is assumed and checked for.
Fix this by requesting a level one PBLE only.

Fixes: b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs")
Signed-off-by: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>
Signed-off-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>
---
 drivers/infiniband/hw/irdma/verbs.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
index 01d0dc4..dc3f5f3 100644
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -2329,9 +2329,10 @@ static bool irdma_check_mr_contiguous(struct irdma_pble_alloc *palloc,
  * @rf: RDMA PCI function
  * @iwmr: mr pointer for this memory registration
  * @use_pbles: flag if to use pble's
+ * @lvl_1_only: request only level 1 pble if true
  */
 static int irdma_setup_pbles(struct irdma_pci_f *rf, struct irdma_mr *iwmr,
-			     bool use_pbles)
+			     bool use_pbles, bool lvl_1_only)
 {
 	struct irdma_pbl *iwpbl = &iwmr->iwpbl;
 	struct irdma_pble_alloc *palloc = &iwpbl->pble_alloc;
@@ -2342,7 +2343,7 @@ static int irdma_setup_pbles(struct irdma_pci_f *rf, struct irdma_mr *iwmr,
 
 	if (use_pbles) {
 		status = irdma_get_pble(rf->pble_rsrc, palloc, iwmr->page_cnt,
-					false);
+					lvl_1_only);
 		if (status)
 			return status;
 
@@ -2385,16 +2386,10 @@ static int irdma_handle_q_mem(struct irdma_device *iwdev,
 	bool ret = true;
 
 	pg_size = iwmr->page_size;
-	err = irdma_setup_pbles(iwdev->rf, iwmr, use_pbles);
+	err = irdma_setup_pbles(iwdev->rf, iwmr, use_pbles, true);
 	if (err)
 		return err;
 
-	if (use_pbles && palloc->level != PBLE_LEVEL_1) {
-		irdma_free_pble(iwdev->rf->pble_rsrc, palloc);
-		iwpbl->pbl_allocated = false;
-		return -ENOMEM;
-	}
-
 	if (use_pbles)
 		arr = palloc->level1.addr;
 
@@ -2870,7 +2865,7 @@ static struct ib_mr *irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len,
 	case IRDMA_MEMREG_TYPE_MEM:
 		use_pbles = (iwmr->page_cnt != 1);
 
-		err = irdma_setup_pbles(iwdev->rf, iwmr, use_pbles);
+		err = irdma_setup_pbles(iwdev->rf, iwmr, use_pbles, false);
 		if (err)
 			goto error;
 
-- 
1.8.3.1