linux-kernel - Re: [PATCH 2/2] USB: storage: ums-realtek: Enable auto-delink optionally

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Date:   Mon, 26 Aug 2019 06:53:59 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc:     stern@...land.harvard.edu, linux-usb@...r.kernel.org,
        usb-storage@...ts.one-eyed-alien.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] USB: storage: ums-realtek: Enable auto-delink
 optionally

On Mon, Aug 26, 2019 at 12:46:30PM +0800, Kai-Heng Feng wrote:
> Auto-delink requires writing special registers to ums-realtek device.
> Unconditionally enable auto-delink may break newer devices.
> 
> So only enable auto-delink by default for the original three IDs,
> 0x0138, 0x0158 and 0x0159.
> 
> Realtek is working on a patch to properly support auto-delink for other
> IDs.
> 
> BugLink: https://bugs.launchpad.net/bugs/1838886
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
> ---
>  drivers/usb/storage/realtek_cr.c | 24 +++++++++++++++++++-----
>  1 file changed, 19 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/storage/realtek_cr.c b/drivers/usb/storage/realtek_cr.c
> index 4d86cfcc0b40..376f41d0cbc3 100644
> --- a/drivers/usb/storage/realtek_cr.c
> +++ b/drivers/usb/storage/realtek_cr.c
> @@ -36,6 +36,10 @@ MODULE_DESCRIPTION("Driver for Realtek USB Card Reader");
>  MODULE_AUTHOR("wwang <wei_wang@...lsil.com.cn>");
>  MODULE_LICENSE("GPL");
>  
> +static int auto_delink_enable = -1;
> +module_param(auto_delink_enable, int, S_IRUGO | S_IWUSR);
> +MODULE_PARM_DESC(auto_delink_enable, "enable auto delink (-1=auto [default], 0=disable, 1=enable)");
> +
>  static int auto_delink_mode = 1;
>  module_param(auto_delink_mode, int, S_IRUGO | S_IWUSR);
>  MODULE_PARM_DESC(auto_delink_mode, "auto delink mode (0=firmware, 1=software [default])");
> @@ -996,12 +1000,22 @@ static int init_realtek_cr(struct us_data *us)
>  			goto INIT_FAIL;
>  	}

This patch doesn't apply as I can't take your first patch.  Can you redo
it and resend?

thanks,

greg k-h