linux-kernel - Re: [PATCH v4 1/2] char: xillybus: Move class-related functions to new xillybus

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Date:   Sun, 21 Mar 2021 13:24:05 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     eli.billauer@...il.com
Cc:     arnd@...db.de, devel@...verdev.osuosl.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        dan.carpenter@...cle.com
Subject: Re: [PATCH v4 1/2] char: xillybus: Move class-related functions to
 new xillybus_class.c

On Thu, Mar 11, 2021 at 11:50:32AM +0200, eli.billauer@...il.com wrote:
> From: Eli Billauer <eli.billauer@...il.com>
> 
> This patch is a preparation for adding another related driver, XillyUSB.
> In order to share some code between the existing Xillybus driver and the
> one to be added, some functions are moved to xillybus_class.c
> 
> The header file, xillybus_class.h, is temporarily placed in include/linux/,
> because the new XillyUSB driver is intended as a staging driver for the
> time being.
> 
> Signed-off-by: Eli Billauer <eli.billauer@...il.com>
> ---
> 
> Notes:
>     Changelog:
>     
>     v4:
>       - Fix error code return value bugs in xillybus_init_chrdev() as detected by
>         Smatch test robot, and reported by Dan Carpenter.
>     
>     This patch did not exist prior to v3.
> 
>  drivers/char/xillybus/Kconfig          |   4 +
>  drivers/char/xillybus/Makefile         |   1 +
>  drivers/char/xillybus/xillybus.h       |  10 +-
>  drivers/char/xillybus/xillybus_class.c | 263 +++++++++++++++++++++++++
>  drivers/char/xillybus/xillybus_core.c  | 181 +++--------------
>  include/linux/xillybus_class.h         |  30 +++
>  6 files changed, 322 insertions(+), 167 deletions(-)
>  create mode 100644 drivers/char/xillybus/xillybus_class.c
>  create mode 100644 include/linux/xillybus_class.h
> 
> diff --git a/drivers/char/xillybus/Kconfig b/drivers/char/xillybus/Kconfig
> index 130dbdce858f..e7800f025249 100644
> --- a/drivers/char/xillybus/Kconfig
> +++ b/drivers/char/xillybus/Kconfig
> @@ -3,10 +3,14 @@
>  # Xillybus devices
>  #
>  
> +config XILLYBUS_CLASS
> +	tristate
> +
>  config XILLYBUS
>  	tristate "Xillybus generic FPGA interface"
>  	depends on PCI || OF
>  	select CRC32
> +	select XILLYBUS_CLASS

depends on, do not select.