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SubjectRe: [PATCH] usb: gadget: Mark USB_FSL_QE broken on 64-bit
On Wed, Oct 27, 2021 at 5:25 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>
> On 64-bit:
>
> drivers/usb/gadget/udc/fsl_qe_udc.c: In function ‘qe_ep0_rx’:
> drivers/usb/gadget/udc/fsl_qe_udc.c:842:13: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
> 842 | vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
> | ^
> In file included from drivers/usb/gadget/udc/fsl_qe_udc.c:41:
> drivers/usb/gadget/udc/fsl_qe_udc.c:843:28: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
> 843 | frame_set_data(pframe, (u8 *)vaddr);
> | ^
>
> The driver assumes physical and virtual addresses are 32-bit, hence it
> cannot work on 64-bit platforms.

The device is truly only used in legacy 32-bit PowerPC chips and never
tested with 64-bit. Thanks.

>
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

Acked-by: Li Yang <leoyang.li@nxp.com>

> ---
> One more casualty of CONFIG_WERROR=y.
> http://kisskb.ellerman.id.au/kisskb/buildresult/14652936/
> ---
> drivers/usb/gadget/udc/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
> index 8c614bb86c665c77..69394dc1cdfb6436 100644
> --- a/drivers/usb/gadget/udc/Kconfig
> +++ b/drivers/usb/gadget/udc/Kconfig
> @@ -330,6 +330,7 @@ config USB_AMD5536UDC
> config USB_FSL_QE
> tristate "Freescale QE/CPM USB Device Controller"
> depends on FSL_SOC && (QUICC_ENGINE || CPM)
> + depends on !64BIT || BROKEN
> help
> Some of Freescale PowerPC processors have a Full Speed
> QE/CPM2 USB controller, which support device mode with 4
> --
> 2.25.1
>

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