RE: [PATCH v4 2/8] wireless: wl1271: support return value for the set power func

["DebBarma, Tarun Kanti" <tarun.kanti@ti.com>]

Ohad,

> -----Original Message-----
> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
> owner@vger.kernel.org] On Behalf Of Ohad Ben-Cohen
> Sent: Wednesday, August 11, 2010 11:52 PM
> To: linux-wireless@vger.kernel.org; linux-mmc@vger.kernel.org; linux-
> omap@vger.kernel.org
> Cc: Ido Yariv; Mark Brown; linux-arm-kernel@lists.infradead.org;
> Chikkature Rajashekar, Madhusudhan; Luciano Coelho; akpm@linux-
> foundation.org; San Mehat; Roger Quadros; Tony Lindgren; Nicolas Pitre;
> Pandita, Vikram; Kalle Valo; Ohad Ben-Cohen
> Subject: [PATCH v4 2/8] wireless: wl1271: support return value for the set
> power func
> 
> Make it possible for the set power method to indicate a
> success/failure return value. This is needed to support
> more complex power on/off operations such as bringing up
> (and down) sdio functions.
> 
> Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
> ---
>  drivers/net/wireless/wl12xx/wl1271.h      |    2 +-
>  drivers/net/wireless/wl12xx/wl1271_io.h   |    8 +++++---
>  drivers/net/wireless/wl12xx/wl1271_main.c |    4 +++-
>  drivers/net/wireless/wl12xx/wl1271_sdio.c |    4 +++-
>  drivers/net/wireless/wl12xx/wl1271_spi.c  |    4 +++-
>  5 files changed, 15 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/wireless/wl12xx/wl1271.h
> b/drivers/net/wireless/wl12xx/wl1271.h
> index dd3cee6..faa5925 100644
> --- a/drivers/net/wireless/wl12xx/wl1271.h
> +++ b/drivers/net/wireless/wl12xx/wl1271.h
> @@ -313,7 +313,7 @@ struct wl1271_if_operations {
>  		     bool fixed);
>  	void (*reset)(struct wl1271 *wl);
>  	void (*init)(struct wl1271 *wl);
> -	void (*power)(struct wl1271 *wl, bool enable);
> +	int (*power)(struct wl1271 *wl, bool enable);
>  	struct device* (*dev)(struct wl1271 *wl);
>  	void (*enable_irq)(struct wl1271 *wl);
>  	void (*disable_irq)(struct wl1271 *wl);
> diff --git a/drivers/net/wireless/wl12xx/wl1271_io.h
> b/drivers/net/wireless/wl12xx/wl1271_io.h
> index bc806c7..4a5b92c 100644
> --- a/drivers/net/wireless/wl12xx/wl1271_io.h
> +++ b/drivers/net/wireless/wl12xx/wl1271_io.h
> @@ -144,10 +144,12 @@ static inline void wl1271_power_off(struct wl1271
> *wl)
>  	clear_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);
>  }
> 
> -static inline void wl1271_power_on(struct wl1271 *wl)
> +static inline int wl1271_power_on(struct wl1271 *wl)
>  {
> -	wl->if_ops->power(wl, true);
> -	set_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);
> +	int ret = wl->if_ops->power(wl, true);
Just a minor comment, need a blank line here?
> +	if (ret == 0)
> +		set_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);
> +	return ret;
>  }
> 
> 
> diff --git a/drivers/net/wireless/wl12xx/wl1271_main.c
> b/drivers/net/wireless/wl12xx/wl1271_main.c
> index 9d68f00..e6e0852 100644
> --- a/drivers/net/wireless/wl12xx/wl1271_main.c
> +++ b/drivers/net/wireless/wl12xx/wl1271_main.c
> @@ -621,7 +621,9 @@ static int wl1271_chip_wakeup(struct wl1271 *wl)
>  	int ret = 0;
> 
>  	msleep(WL1271_PRE_POWER_ON_SLEEP);
> -	wl1271_power_on(wl);
> +	ret = wl1271_power_on(wl);
> +	if (ret < 0)
> +		goto out;
>  	msleep(WL1271_POWER_ON_SLEEP);
>  	wl1271_io_reset(wl);
>  	wl1271_io_init(wl);
> diff --git a/drivers/net/wireless/wl12xx/wl1271_sdio.c
> b/drivers/net/wireless/wl12xx/wl1271_sdio.c
> index 7059b5c..c41293a 100644
> --- a/drivers/net/wireless/wl12xx/wl1271_sdio.c
> +++ b/drivers/net/wireless/wl12xx/wl1271_sdio.c
> @@ -152,7 +152,7 @@ static void wl1271_sdio_raw_write(struct wl1271 *wl,
> int addr, void *buf,
> 
>  }
> 
> -static void wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
> +static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
>  {
>  	struct sdio_func *func = wl_to_func(wl);
> 
> @@ -167,6 +167,8 @@ static void wl1271_sdio_set_power(struct wl1271 *wl,
> bool enable)
>  		sdio_disable_func(func);
>  		sdio_release_host(func);
>  	}
> +
> +	return 0;
>  }
> 
>  static struct wl1271_if_operations sdio_ops = {
> diff --git a/drivers/net/wireless/wl12xx/wl1271_spi.c
> b/drivers/net/wireless/wl12xx/wl1271_spi.c
> index c3fdab7..de56d8d 100644
> --- a/drivers/net/wireless/wl12xx/wl1271_spi.c
> +++ b/drivers/net/wireless/wl12xx/wl1271_spi.c
> @@ -312,10 +312,12 @@ static irqreturn_t wl1271_irq(int irq, void *cookie)
>  	return IRQ_HANDLED;
>  }
> 
> -static void wl1271_spi_set_power(struct wl1271 *wl, bool enable)
> +static int wl1271_spi_set_power(struct wl1271 *wl, bool enable)
>  {
>  	if (wl->set_power)
>  		wl->set_power(enable);
> +
> +	return 0;
>  }
> 
>  static struct wl1271_if_operations spi_ops = {
> --
> 1.7.0.4
> 
> --
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