From: "Dingyan Li" <18500469033@163.com>
To: gregkh@linuxfoundation.org, stern@rowland.harvard.edu
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re:[PATCH] USB: add new speed value to USB debugfs
Date: Sun, 20 Aug 2023 14:30:59 +0800 (CST) [thread overview]
Message-ID: <563084ba.e93.18a11a3c2f2.Coremail.18500469033@163.com> (raw)
In-Reply-To: <20230818153509.38814-1-18500469033@163.com>
At 2023-08-18 23:35:09, "Dingyan Li" <18500469033@163.com> wrote:
>Current max speed supported in USB debugfs is 10000.
>Since USB 3.2 GEN_2x2 has reached 20000, it's better
>to add it. The idea is borrowed from USB sysfs, with
>a combination of USB_SPEED_SUPER_PLUS and
>USB_SSP_GEN_2x2, the actual speed should be 20000.
>
>Signed-off-by: Dingyan Li <18500469033@163.com>
>---
> drivers/usb/core/devices.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
>index a247da73f34d..78ebcb657dce 100644
>--- a/drivers/usb/core/devices.c
>+++ b/drivers/usb/core/devices.c
>@@ -429,7 +429,11 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes,
> case USB_SPEED_SUPER:
> speed = "5000"; break;
> case USB_SPEED_SUPER_PLUS:
>- speed = "10000"; break;
>+ if (usbdev->ssp_rate == USB_SSP_GEN_2x2)
>+ speed = "20000";
>+ else
>+ speed = "10000";
>+ break;
> default:
> speed = "??";
> }
>--
>2.25.1
Please ignore this patch, which will be covered in another patch.
Sorry for the inconvenience.
Regards,
Dingyan
prev parent reply other threads:[~2023-08-20 6:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-18 15:35 [PATCH] " Dingyan Li
2023-08-20 6:30 ` Dingyan Li [this message]
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