linux-kernel - Re: ERROR: "bad_dma_ops" [drivers/tty/serial/stm32-usart.ko] undefined!

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Date:   Mon, 24 Oct 2016 09:44:43 +0200
From:   Alexandre Torgue <alexandre.torgue@...com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
CC:     kbuild test robot <fengguang.wu@...el.com>, <kbuild-all@...org>,
        <linux-kernel@...r.kernel.org>, Gerald Baeza <gerald.baeza@...com>
Subject: Re: ERROR: "bad_dma_ops" [drivers/tty/serial/stm32-usart.ko]
 undefined!

Hi Greg,

On 10/23/2016 11:54 AM, kbuild test robot wrote:
> Hi Alexandre,
>
> First bad commit (maybe != root cause):
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   0c2b6dc4fd4fa13796b319aae969a009f03222c6
> commit: 3489187204eb75e5635d8836babfd0a18be613f4 serial: stm32: adding dma support
> date:   4 weeks ago
> config: m32r-allmodconfig (attached as .config)
> compiler: m32r-linux-gcc (GCC) 6.2.0
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout 3489187204eb75e5635d8836babfd0a18be613f4
>         # save the attached .config to linux build tree
>         make.cross ARCH=m32r
>
> All errors (new ones prefixed by >>):
>
>    ERROR: "bad_dma_ops" [sound/soc/bcm/snd-soc-cygnus.ko] undefined!
>    ERROR: "bad_dma_ops" [sound/core/snd-pcm.ko] undefined!
>    ERROR: "dma_common_mmap" [sound/core/snd-pcm.ko] undefined!
>>> ERROR: "bad_dma_ops" [drivers/tty/serial/stm32-usart.ko] undefined!
>

This issue will be fixed by patch:
"[PATCH] serial: SERIAL_STM32 should depend on HAS_DMA"
sent by Geert Uytterhoeven.

Regards
Alex