linux-kernel - RE: [PATCH 15/20] video: msm: convert printk to pr

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Message-ID: <EAF47CD23C76F840A9E7FCE10091EFAB033D22EB7F@dbde02.ent.ti.com>
Date:	Mon, 21 Mar 2011 10:52:37 +0530
From:	"Janorkar, Mayuresh" <mayur@...com>
To:	Carl Vanderlip <carlv@...eaurora.org>,
	David Brown <davidb@...eaurora.org>,
	Daniel Walker <dwalker@...o99.com>,
	Bryan Huntsman <bryanh@...eaurora.org>
CC:	Brian Swetland <swetland@...gle.com>,
	Dima Zavin <dima@...roid.com>,
	Rebecca Schultz Zavin <rebecca@...roid.com>,
	Colin Cross <ccross@...roid.com>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 15/20] video: msm: convert printk to pr_*



> -----Original Message-----
> From: linux-fbdev-owner@...r.kernel.org [mailto:linux-fbdev-
> owner@...r.kernel.org] On Behalf Of Carl Vanderlip
> Sent: Saturday, March 19, 2011 3:29 AM
> To: David Brown; Daniel Walker; Bryan Huntsman
> Cc: Brian Swetland; Dima Zavin; Rebecca Schultz Zavin; Colin Cross; linux-
> fbdev@...r.kernel.org; Carl Vanderlip; linux-arm-
> kernel@...ts.infradead.org; linux-arm-msm@...r.kernel.org; linux-
> kernel@...r.kernel.org
> Subject: [PATCH 15/20] video: msm: convert printk to pr_*
> 
> Reword debugging messages to use pr_err and pr_warning
> 
> Authors:
> Dima Zavin <dima@...roid.com>
> Rebecca Schultz Zavin <rebecca@...roid.com>
> Colin Cross <ccross@...roid.com>
> 
> Signed-off-by: Carl Vanderlip <carlv@...eaurora.org>
> ---
>  drivers/video/msm/mdp.c |   11 ++++-------
>  1 files changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/video/msm/mdp.c b/drivers/video/msm/mdp.c
> index 8184ca9..b03204d 100644
> --- a/drivers/video/msm/mdp.c
> +++ b/drivers/video/msm/mdp.c
> @@ -42,16 +42,13 @@ DEFINE_MUTEX(mdp_mutex);
> 
>  static int locked_enable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
>  {
> -	int ret = 0;
> -
>  	BUG_ON(!mask);
> 
>  	/* if the mask bits are already set return an error, this interrupt
>  	 * is already enabled */
>  	if (mdp_irq_mask & mask) {
> -		printk(KERN_ERR "mdp irq already on already on %x %x\n",
> -		       mdp_irq_mask, mask);
> -		ret = -1;
> +		pr_err("mdp irq already on %x %x\n", mdp_irq_mask, mask);
> +		return -1;

Please use standard error codes.
http://lxr.linux.no/#linux+v2.6.38/include/asm-generic/errno-base.h
The code would be more readable.
Plus it would help in debugging.

>  	}
>  	/* if the mdp irq is not already enabled enable it */
>  	if (!mdp_irq_mask) {
> @@ -172,9 +169,9 @@ static int mdp_wait(struct mdp_info *mdp, uint32_t
> mask, wait_queue_head_t *wq)
> 
>  	spin_lock_irqsave(&mdp->lock, irq_flags);
>  	if (mdp_irq_mask & mask) {
> +		pr_warning("%s: timeout waiting for mdp to complete 0x%x\n",
> +			   __func__, mask);
>  		locked_disable_mdp_irq(mdp, mask);
> -		printk(KERN_WARNING "timeout waiting for mdp to complete
> %x\n",
> -		       mask);
>  		ret = -ETIMEDOUT;
>  	}
>  	spin_unlock_irqrestore(&mdp->lock, irq_flags);
> --
> Sent by an employee of the Qualcomm Innovation Center, Inc.
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
> 
> --
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