linux-kernel - RE: [PATCH 3/6] staging: comedi: addi_apci_1564: introduce apci1564

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Date:	Fri, 30 May 2014 16:44:41 +0000
From:	Hartley Sweeten <HartleyS@...ionengravers.com>
To:	Chase Southwood <chase.southwood@...il.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:	"abbotti@....co.uk" <abbotti@....co.uk>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 3/6] staging: comedi: addi_apci_1564: introduce
 apci1564_private struct

On Thursday, May 29, 2014 9:43 PM, Chase Southwood wrote:
> The addi_private struct defined in addi-data/addi_common.h is very bloated
> and contains many fields which addi_apci_1564 does not require.  In the
> interest of eventually removing this driver's dependency on
> addi_common.h, we can create a private data struct specifically for
> addi_apci_1564 containing only the fields it will actually use.
>
> Signed-off-by: Chase Southwood <chase.southwood@...il.com>
> Cc: Ian Abbott <abbotti@....co.uk>
> Cc: H Hartley Sweeten <hsweeten@...ionengravers.com>
> ---
>  .../comedi/drivers/addi-data/hwdrv_apci1564.c      | 164 +++++++++++----------
>  drivers/staging/comedi/drivers/addi_apci_1564.c    |  34 ++---
>  2 files changed, 102 insertions(+), 96 deletions(-)
>
> diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
> index f974bd2..054e731 100644
> --- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
> +++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
> @@ -49,7 +49,7 @@
>  #define APCI1564_COUNTER4				3
>  
>  /*
> - * devpriv->i_IobaseAmcc Register Map
> + * devpriv->amcc_iobase Register Map
>   */
>  #define APCI1564_DI_REG					0x04
>  #define APCI1564_DI_INT_MODE1_REG			0x08
> @@ -93,6 +93,12 @@
>  static unsigned int ui_InterruptStatus_1564;
>  static unsigned int ui_InterruptData, ui_Type;

These static variables could also go into the new private data struct.
But, hopefully you will be removing them eventually anyway.

>  
> +struct apci1564_private {
> +	unsigned int amcc_iobase;	/* base of AMCC I/O registers */
> +	unsigned char timer_select_mode;
> +	unsigned char mode_select_register;
> +};
> +

The new private data struct should really be defined in the driver (addi_apci_1564.c)
before the include of hwdrv_apci1564.c . Then you don't have to move it later.

Other than that:

Reviewed-by: H Hartley Sweeten <hsweeten@...ionengravers.com>

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