linux-kernel - [PATCH v3 11/24] RDMA/nes: Remove call to memset after pci_alloc

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Date:   Mon, 15 Jul 2019 11:18:23 +0800
From:   Fuqian Huang <huangfq.daxian@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Faisal Latif <faisal.latif@...el.com>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Fuqian Huang <huangfq.daxian@...il.com>
Subject: [PATCH v3 11/24] RDMA/nes: Remove call to memset after pci_alloc_consistent

pci_alloc_consitent calls dma_alloc_coherent directly.
In commit 518a2f1925c3
("dma-mapping: zero memory returned from dma_alloc_*"),
dma_alloc_coherent has already zeroed the memory.
So memset is not needed.

Signed-off-by: Fuqian Huang <huangfq.daxian@...il.com>
---
Changes in v3:
  - Use actual commit rather than the merge commit in the commit message

 drivers/infiniband/hw/nes/nes_verbs.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index 49024326a518..534f978f1a58 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/drivers/infiniband/hw/nes/nes_verbs.c
@@ -828,7 +828,6 @@ static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
 		kunmap(nesqp->page);
 		return -ENOMEM;
 	}
-	memset(nesqp->pbl_vbase, 0, 256);
 	/* fill in the page address in the pbl buffer.. */
 	tpbl = pblbuffer + 16;
 	pbl = (__le64 *)nespbl->pbl_vbase;
@@ -898,8 +897,6 @@ static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
 			"host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
 			mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
 
-	memset(mem, 0, nesqp->qp_mem_size);
-
 	nesqp->hwqp.sq_vbase = mem;
 	mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
 
-- 
2.11.0