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SubjectRE: [PATCH] PCI: endpoint: functions: Use kmemdup instead of duplicating its function
Date
Hi,

On 06 December 2018 10:21, Wen Yang wrote:
> 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.yang99@zte.com.cn>
> CC: Bob Copeland <me@bobcopeland.com>
>
> CC: Kishon Vijay Abraham I <kishon@ti.com>
> CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> CC: Bjorn Helgaas <bhelgaas@google.com>
> CC: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
> CC: Niklas Cassel <niklas.cassel@axis.com>
> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> CC: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
> CC: linux-pci@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..6e42daa2a651 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 = kzalloc(src_addr, reg->size, GFP_KERNEL);
Looks like a typo - kmemdup instead of kzalloc?

> 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

Regards,
Alan

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