linux-kernel - RE: [PATCH] usb: cdns3: delete repeated clear operations

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Date:   Mon, 22 Mar 2021 07:19:46 +0000
From:   Pawel Laszczak <pawell@...ence.com>
To:     "peter.chen@...nel.org" <peter.chen@...nel.org>,
        Wang Qing <wangqing@...o.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] usb: cdns3: delete repeated clear operations

Hi Peter,

Can you add this patch to for-usb-next branch.

Thanks.

>
>
>dma_alloc_coherent already zeroes out memory, so memset is not needed.
>
>Signed-off-by: Wang Qing <wangqing@...o.com>

Reviewed-by: Pawel Laszczak <pawell@...ence.com>

>---
> drivers/usb/cdns3/cdnsp-mem.c | 1 -
> 1 file changed, 1 deletion(-)
>
>diff --git a/drivers/usb/cdns3/cdnsp-mem.c b/drivers/usb/cdns3/cdnsp-mem.c
>index 7a84e92..1d1b9a4
>--- a/drivers/usb/cdns3/cdnsp-mem.c
>+++ b/drivers/usb/cdns3/cdnsp-mem.c
>@@ -1231,7 +1231,6 @@ int cdnsp_mem_init(struct cdnsp_device *pdev)
> 	if (!pdev->dcbaa)
> 		return -ENOMEM;
>
>-	memset(pdev->dcbaa, 0, sizeof(*pdev->dcbaa));
> 	pdev->dcbaa->dma = dma;
>
> 	cdnsp_write_64(dma, &pdev->op_regs->dcbaa_ptr);
>--
>2.7.4

Regards,
Pawel Laszczak