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List: linux-arm-kernel
Subject: Re: [PATCH 01/12] usb: mtu3: fix error return code in ssusb_gadget_init()
From: Sergei Shtylyov <sergei.shtylyov () cogentembedded ! com>
Date: 2017-09-30 13:00:28
Message-ID: 46f6e8f0-0398-e33e-10fc-d0db6ce06db0 () cogentembedded ! com
[Download RAW message or body]
Hello!
On 9/28/2017 3:17 AM, Chunfeng Yun wrote:
> When fail to get irq number, platform_get_irq() may return
Failing. IRQ. :-)
> -EPROBE_DEFER, but we ignore it and always return -ENODEV,
> so fix it.
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
> drivers/usb/mtu3/mtu3_core.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
> index 99c65b0..9475798 100644
> --- a/drivers/usb/mtu3/mtu3_core.c
> +++ b/drivers/usb/mtu3/mtu3_core.c
> @@ -774,9 +774,9 @@ int ssusb_gadget_init(struct ssusb_mtk *ssusb)
> return -ENOMEM;
>
> mtu->irq = platform_get_irq(pdev, 0);
> - if (mtu->irq <= 0) {
> + if (mtu->irq < 0) {
This is good as the function no longer returns 0 on error. Even when it
did, 0 could mean a valid IRQ as well...
> dev_err(dev, "fail to get irq number\n");
> - return -ENODEV;
> + return mtu->irq;
> }
> dev_info(dev, "irq %d\n", mtu->irq);
>
MBR, Sergei
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