[PATCH v2] PCI: endpoint: functions: Use kmemdup instead of duplicating its function

[Wen Yang]

kmemdup has implemented the function that kmalloc() + memcpy().
We prefer to kmemdup rather than code opened implementation.

This issue was detected with the help of coccinelle.

Signed-off-by: Wen Yang <wen.yan...@zte.com.cn>
CC: Kishon Vijay Abraham I <kis...@ti.com>
CC: Lorenzo Pieralisi <lorenzo.pieral...@arm.com>
CC: Bjorn Helgaas <bhelg...@google.com>
CC: Gustavo Pimentel <gustavo.pimen...@synopsys.com>
CC: Niklas Cassel <niklas.cas...@axis.com>
CC: Greg Kroah-Hartman <gre...@linuxfoundation.org>
CC: Cyrille Pitchen <cyrille.pitc...@free-electrons.com>
CC: linux-...@vger.kernel.org (open list:PCI ENDPOINT SUBSYSTEM)
CC: linux-kernel@vger.kernel.org (open list)
---
 drivers/pci/endpoint/functions/pci-epf-test.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c 
b/drivers/pci/endpoint/functions/pci-epf-test.c
index 3e86fa3c7da3..8df6c019f8a2 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -169,14 +169,12 @@ static int pci_epf_test_read(struct pci_epf_test 
*epf_test)
                goto err_addr;
        }
 
-       buf = kzalloc(reg->size, GFP_KERNEL);
+       buf = kmemdup(src_addr, reg->size, GFP_KERNEL);
        if (!buf) {
                ret = -ENOMEM;
                goto err_map_addr;
        }
 
-       memcpy(buf, src_addr, reg->size);
-
        crc32 = crc32_le(~0, buf, reg->size);
        if (crc32 != reg->checksum)
                ret = -EIO;
-- 
2.19.1