From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Thu, 20 Oct 2016 00:10:27 -0300
Subject: Linux-libre 4.8.2-gnu

---
 drivers/infiniband/hw/cxgb4/cq.c | 52 +++++++++++++++++++++++-----------------
 1 file changed, 30 insertions(+), 22 deletions(-)

(limited to 'drivers/infiniband/hw/cxgb4/cq.c')

diff --git a/drivers/infiniband/hw/cxgb4/cq.c b/drivers/infiniband/hw/cxgb4/cq.c
index b0b955724..ac926c942 100644
--- a/drivers/infiniband/hw/cxgb4/cq.c
+++ b/drivers/infiniband/hw/cxgb4/cq.c
@@ -33,19 +33,15 @@
 #include "iw_cxgb4.h"
 
 static int destroy_cq(struct c4iw_rdev *rdev, struct t4_cq *cq,
-		      struct c4iw_dev_ucontext *uctx)
+		      struct c4iw_dev_ucontext *uctx, struct sk_buff *skb)
 {
 	struct fw_ri_res_wr *res_wr;
 	struct fw_ri_res *res;
 	int wr_len;
 	struct c4iw_wr_wait wr_wait;
-	struct sk_buff *skb;
 	int ret;
 
 	wr_len = sizeof *res_wr + sizeof *res;
-	skb = alloc_skb(wr_len, GFP_KERNEL);
-	if (!skb)
-		return -ENOMEM;
 	set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
 
 	res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len);
@@ -863,7 +859,9 @@ int c4iw_destroy_cq(struct ib_cq *ib_cq)
 	ucontext = ib_cq->uobject ? to_c4iw_ucontext(ib_cq->uobject->context)
 				  : NULL;
 	destroy_cq(&chp->rhp->rdev, &chp->cq,
-		   ucontext ? &ucontext->uctx : &chp->cq.rdev->uctx);
+		   ucontext ? &ucontext->uctx : &chp->cq.rdev->uctx,
+		   chp->destroy_skb);
+	chp->destroy_skb = NULL;
 	kfree(chp);
 	return 0;
 }
@@ -879,7 +877,7 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
 	struct c4iw_cq *chp;
 	struct c4iw_create_cq_resp uresp;
 	struct c4iw_ucontext *ucontext = NULL;
-	int ret;
+	int ret, wr_len;
 	size_t memsize, hwentries;
 	struct c4iw_mm_entry *mm, *mm2;
 
@@ -896,6 +894,13 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
 	if (!chp)
 		return ERR_PTR(-ENOMEM);
 
+	wr_len = sizeof(struct fw_ri_res_wr) + sizeof(struct fw_ri_res);
+	chp->destroy_skb = alloc_skb(wr_len, GFP_KERNEL);
+	if (!chp->destroy_skb) {
+		ret = -ENOMEM;
+		goto err1;
+	}
+
 	if (ib_context)
 		ucontext = to_c4iw_ucontext(ib_context);
 
@@ -936,7 +941,7 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
 	ret = create_cq(&rhp->rdev, &chp->cq,
 			ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
 	if (ret)
-		goto err1;
+		goto err2;
 
 	chp->rhp = rhp;
 	chp->cq.size--;				/* status page */
@@ -947,15 +952,15 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
 	init_waitqueue_head(&chp->wait);
 	ret = insert_handle(rhp, &rhp->cqidr, chp, chp->cq.cqid);
 	if (ret)
-		goto err2;
+		goto err3;
 
 	if (ucontext) {
 		mm = kmalloc(sizeof *mm, GFP_KERNEL);
 		if (!mm)
-			goto err3;
+			goto err4;
 		mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
 		if (!mm2)
-			goto err4;
+			goto err5;
 
 		uresp.qid_mask = rhp->rdev.cqmask;
 		uresp.cqid = chp->cq.cqid;
@@ -970,7 +975,7 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
 		ret = ib_copy_to_udata(udata, &uresp,
 				       sizeof(uresp) - sizeof(uresp.reserved));
 		if (ret)
-			goto err5;
+			goto err6;
 
 		mm->key = uresp.key;
 		mm->addr = virt_to_phys(chp->cq.queue);
@@ -986,15 +991,18 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
 	     __func__, chp->cq.cqid, chp, chp->cq.size,
 	     chp->cq.memsize, (unsigned long long) chp->cq.dma_addr);
 	return &chp->ibcq;
-err5:
+err6:
 	kfree(mm2);
-err4:
+err5:
 	kfree(mm);
-err3:
+err4:
 	remove_handle(rhp, &rhp->cqidr, chp->cq.cqid);
-err2:
+err3:
 	destroy_cq(&chp->rhp->rdev, &chp->cq,
-		   ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
+		   ucontext ? &ucontext->uctx : &rhp->rdev.uctx,
+		   chp->destroy_skb);
+err2:
+	kfree_skb(chp->destroy_skb);
 err1:
 	kfree(chp);
 	return ERR_PTR(ret);
@@ -1008,15 +1016,15 @@ int c4iw_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata)
 int c4iw_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
 {
 	struct c4iw_cq *chp;
-	int ret;
+	int ret = 0;
 	unsigned long flag;
 
 	chp = to_c4iw_cq(ibcq);
 	spin_lock_irqsave(&chp->lock, flag);
-	ret = t4_arm_cq(&chp->cq,
-			(flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED);
+	t4_arm_cq(&chp->cq,
+		  (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED);
+	if (flags & IB_CQ_REPORT_MISSED_EVENTS)
+		ret = t4_cq_notempty(&chp->cq);
 	spin_unlock_irqrestore(&chp->lock, flag);
-	if (ret && !(flags & IB_CQ_REPORT_MISSED_EVENTS))
-		ret = 0;
 	return ret;
 }
-- 
cgit v1.2.3-54-g00ecf