linux-kernel - Re: [PATCH 1/3] staging: drm/imx: check return value of ipu

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Message-ID: <20121227100651.GT26326@pengutronix.de>
Date:	Thu, 27 Dec 2012 11:06:51 +0100
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Lothar Waßmann <LW@...O-electronics.de>
Cc:	Fabio Estevam <fabio.estevam@...escale.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] staging: drm/imx: check return value of ipu_reset()

On Tue, Dec 25, 2012 at 03:58:37PM +0100, Lothar Waßmann wrote:
> ipu_reset() can fail with a timeout. Check the return value and act
> appropriately.
> 
> Signed-off-by: Lothar Waßmann <LW@...O-electronics.de>

All:

Acked-by: Sascha Hauer <s.hauer@...gutronix.de>

> ---
>  drivers/staging/imx-drm/ipu-v3/ipu-common.c |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/staging/imx-drm/ipu-v3/ipu-common.c b/drivers/staging/imx-drm/ipu-v3/ipu-common.c
> index 677e665..f7059cd 100644
> --- a/drivers/staging/imx-drm/ipu-v3/ipu-common.c
> +++ b/drivers/staging/imx-drm/ipu-v3/ipu-common.c
> @@ -1104,7 +1104,9 @@ static int ipu_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto out_failed_irq;
>  
> -	ipu_reset(ipu);
> +	ret = ipu_reset(ipu);
> +	if (ret)
> +		goto out_failed_reset;
>  
>  	/* Set MCU_T to divide MCU access window into 2 */
>  	ipu_cm_write(ipu, 0x00400000L | (IPU_MCU_T_DEFAULT << 18),
> @@ -1129,6 +1131,7 @@ failed_add_clients:
>  	ipu_submodules_exit(ipu);
>  failed_submodules_init:
>  	ipu_irq_exit(ipu);
> +out_failed_reset:
>  out_failed_irq:
>  	clk_disable_unprepare(ipu->clk);
>  failed_clk_get:
> -- 
> 1.7.2.5
> 
> 

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