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SubjectRE: [PATCH 15/20] video: msm: convert printk to pr_*


> -----Original Message-----
> From: linux-fbdev-owner@vger.kernel.org [mailto:linux-fbdev-
> owner@vger.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@vger.kernel.org; Carl Vanderlip; linux-arm-
> kernel@lists.infradead.org; linux-arm-msm@vger.kernel.org; linux-
> kernel@vger.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@android.com>
> Rebecca Schultz Zavin <rebecca@android.com>
> Colin Cross <ccross@android.com>
>
> Signed-off-by: Carl Vanderlip <carlv@codeaurora.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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