linux-kernel - Re: usb.c:undefined reference to `qe

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Date:   Tue, 10 Jan 2023 02:06:05 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     kernel test robot <lkp@...el.com>,
        Masahiro Yamada <masahiroy@...nel.org>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Nicolas Schier <nicolas@...sle.eu>,
        Qiang Zhao <qiang.zhao@....com>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Li Yang <leoyang.li@....com>
Subject: Re: usb.c:undefined reference to `qe_immr'

[adding Cc's]


On 1/9/23 23:59, kernel test robot wrote:
> Hi Masahiro,
> 
> FYI, the error/warning still remains.
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   5a41237ad1d4b62008f93163af1d9b1da90729d8
> commit: 7b4537199a4a8480b8c3ba37a2d44765ce76cd9b kbuild: link symbol CRCs at final link, removing CONFIG_MODULE_REL_CRCS
> date:   8 months ago
> config: powerpc-randconfig-r026-20230110
> compiler: powerpc-linux-gcc (GCC) 12.1.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7b4537199a4a8480b8c3ba37a2d44765ce76cd9b
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 7b4537199a4a8480b8c3ba37a2d44765ce76cd9b
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    powerpc-linux-ld: powerpc-linux-ld: DWARF error: could not find abbrev number 74
>    drivers/soc/fsl/qe/usb.o: in function `qe_usb_clock_set':
>>> usb.c:(.text+0x1e): undefined reference to `qe_immr'
>>> powerpc-linux-ld: usb.c:(.text+0x2a): undefined reference to `qe_immr'
>>> powerpc-linux-ld: usb.c:(.text+0xbc): undefined reference to `qe_setbrg'
>>> powerpc-linux-ld: usb.c:(.text+0xca): undefined reference to `cmxgcr_lock'
>    powerpc-linux-ld: usb.c:(.text+0xce): undefined reference to `cmxgcr_lock'
> 

.config extract:

#
# NXP/Freescale QorIQ SoC drivers
#
# CONFIG_QUICC_ENGINE is not set
CONFIG_QE_USB=y


This is caused by (drivers/soc/fsl/qe/Kconfig):

config QE_USB
	bool
	default y if USB_FSL_QE
	help
	  QE USB Controller support

which does not depend on QUICC_ENGINE, where the latter build provides
the missing symbols.

drivers/usb/gadget/udc/Kconfig:

config USB_FSL_QE
	tristate "Freescale QE/CPM USB Device Controller"
	depends on FSL_SOC && (QUICC_ENGINE || CPM)
	depends on !64BIT || BROKEN

CPM is set but QUICC_ENGINE is not set (by CONFIG_PPC_EP88XC=y).


I don't know of a good fix for this build error.

-- 
~Randy