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From: Bin Meng <bmeng.cn@gmail.com>
To: u-boot@lists.denx.de
Subject: [PATCH v1 3/4] usb: usb-uclass.c: Drop le16_to_cpu() as values are already swapped
Date: Fri, 17 Jul 2020 13:33:17 +0800	[thread overview]
Message-ID: <CAEUhbmUdATe=1B_ttM3C_=WZ6+4yR=161sQSoB_HV1M4453y1w@mail.gmail.com> (raw)
In-Reply-To: <20200702084733.2032531-4-sr@denx.de>

Hi Stefan,

On Thu, Jul 2, 2020 at 4:47 PM Stefan Roese <sr@denx.de> wrote:
>
> These values are already swapped to CPU endianess, so swapping them

Can you please add more details as to when these values are swapped? I
assume this is inside usb_select_config() which is called before this
function is called?

But I wonder how this code ever worked on ARM/x86?

> again is a bug. Let's remove the swap here instead.
>
> Signed-off-by: Stefan Roese <sr@denx.de>
> Cc: Bin Meng <bmeng.cn@gmail.com>
> Cc: Marek Vasut <marex@denx.de>
> ---
>
>  drivers/usb/host/usb-uclass.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
> index cb79dfbbd5..aa08d4ffc6 100644
> --- a/drivers/usb/host/usb-uclass.c
> +++ b/drivers/usb/host/usb-uclass.c
> @@ -416,21 +416,21 @@ static int usb_match_device(const struct usb_device_descriptor *desc,
>                             const struct usb_device_id *id)
>  {
>         if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
> -           id->idVendor != le16_to_cpu(desc->idVendor))
> +           id->idVendor != desc->idVendor)
>                 return 0;
>
>         if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
> -           id->idProduct != le16_to_cpu(desc->idProduct))
> +           id->idProduct != desc->idProduct)
>                 return 0;
>
>         /* No need to test id->bcdDevice_lo != 0, since 0 is never
>            greater than any unsigned number. */
>         if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
> -           (id->bcdDevice_lo > le16_to_cpu(desc->bcdDevice)))
> +           (id->bcdDevice_lo > desc->bcdDevice))
>                 return 0;
>
>         if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
> -           (id->bcdDevice_hi < le16_to_cpu(desc->bcdDevice)))
> +           (id->bcdDevice_hi < desc->bcdDevice))
>                 return 0;
>
>         if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&

Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

Regards,
Bin

  reply	other threads:[~2020-07-17  5:33 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-02  8:47 [PATCH v1 0/4] Stefan Roese
2020-07-02  8:47 ` [PATCH v1 1/4] usb: xhci: Add missing endian conversions (cpu_to_leXX / leXX_to_cpu) Stefan Roese
2020-07-16  9:24   ` Stefan Roese
2020-07-16  9:39     ` Bin Meng
2020-07-17  5:15   ` Bin Meng
2020-07-17  9:57     ` Stefan Roese
2020-07-17 11:18   ` Bin Meng
2020-07-17 11:34     ` Stefan Roese
2020-07-17 13:46       ` Bin Meng
2020-07-17 14:04         ` [PATCH v2 " Stefan Roese
2020-07-17 14:14           ` Bin Meng
2020-07-17 18:22             ` Stefan Roese
2020-07-20  1:48               ` Bin Meng
2020-07-21  8:39                 ` Stefan Roese
2020-07-02  8:47 ` [PATCH v1 2/4] usb: xhci: xhci_mem_init: Use cpu_to_le64() and not xhci_writeq() Stefan Roese
2020-07-17  5:24   ` Bin Meng
2020-07-17 10:04     ` Stefan Roese
2020-07-17 10:09       ` Bin Meng
2020-07-17 10:11         ` Stefan Roese
2020-07-17 10:13           ` Bin Meng
2020-07-17 11:19   ` Bin Meng
2020-07-02  8:47 ` [PATCH v1 3/4] usb: usb-uclass.c: Drop le16_to_cpu() as values are already swapped Stefan Roese
2020-07-17  5:33   ` Bin Meng [this message]
2020-07-17 10:08     ` Stefan Roese
2020-07-17 10:11       ` Bin Meng
2020-07-17 11:19   ` Bin Meng
2020-07-02  8:47 ` [PATCH v1 4/4] usb: xhci: Add virt_to_phys() to support mapped platforms Stefan Roese
2020-07-17  5:57   ` Bin Meng
2020-07-17 10:17     ` Stefan Roese
2020-07-17 10:23       ` Bin Meng
2020-07-17 10:28         ` Stefan Roese
2020-07-17 10:29           ` Bin Meng
2020-07-17 10:31             ` Stefan Roese
2020-07-17 11:19   ` Bin Meng

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