linux-kernel - [PATCH] RDMA/vmw_pvrdma: Use zeroing memory allocator than allocator/memset

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Date:   Sun, 31 Dec 2017 17:59:00 +0530
From:   Himanshu Jha <himanshujha199640@...il.com>
To:     aditr@...are.com, pv-drivers@...are.com
Cc:     dledford@...hat.com, jgg@...pe.ca, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Himanshu Jha <himanshujha199640@...il.com>
Subject: [PATCH] RDMA/vmw_pvrdma: Use zeroing memory allocator than allocator/memset

Use dma_zalloc_coherent for allocating zeroed
memory and remove unnecessary memset function.

Done using Coccinelle.
Generated-by: scripts/coccinelle/api/alloc/kzalloc-simple.cocci
0-day tested with no failures.

Suggested-by: Luis R. Rodriguez <mcgrof@...nel.org>
Signed-off-by: Himanshu Jha <himanshujha199640@...il.com>
---
 drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c
index 1f4e187..1f85168 100644
--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c
@@ -885,8 +885,8 @@ static int pvrdma_pci_probe(struct pci_dev *pdev,
 	dev_info(&pdev->dev, "device version %d, driver version %d\n",
 		 dev->dsr_version, PVRDMA_VERSION);
 
-	dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr),
-				      &dev->dsrbase, GFP_KERNEL);
+	dev->dsr = dma_zalloc_coherent(&pdev->dev, sizeof(*dev->dsr),
+				       &dev->dsrbase, GFP_KERNEL);
 	if (!dev->dsr) {
 		dev_err(&pdev->dev, "failed to allocate shared region\n");
 		ret = -ENOMEM;
@@ -894,7 +894,6 @@ static int pvrdma_pci_probe(struct pci_dev *pdev,
 	}
 
 	/* Setup the shared region */
-	memset(dev->dsr, 0, sizeof(*dev->dsr));
 	dev->dsr->driver_version = PVRDMA_VERSION;
 	dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
 		PVRDMA_GOS_BITS_32 :
-- 
2.7.4