linux-kernel - [PATCH] usb: gadget: Mark USB_FSL

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Message-Id: <20211027080849.3276289-1-geert@linux-m68k.org>
Date:   Wed, 27 Oct 2021 10:08:49 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Li Yang <leoyang.li@....com>, Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-usb@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH] usb: gadget: Mark USB_FSL_QE broken on 64-bit

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.

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