linux-kernel - Re: [PATCH 08/16] Blackfin SPI Driver: add a few more debug messages in useful places

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Date:	Thu, 20 Nov 2008 12:35:29 -0800
From:	David Brownell <david-b@...bell.net>
To:	Bryan Wu <cooloney@...nel.org>
Cc:	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, Mike Frysinger <vapier.adi@...il.com>
Subject: Re: [PATCH 08/16] Blackfin SPI Driver: add a few more debug messages in useful places

On Monday 17 November 2008, Bryan Wu wrote:
> From: Mike Frysinger <vapier.adi@...il.com>
> 
> Signed-off-by: Mike Frysinger <vapier.adi@...il.com>
> Signed-off-by: Bryan Wu <cooloney@...nel.org>

Grr.  I'm tired of acking with a "please provide a real
patch comment".  Consider all the other patches in this
series that don't have patch comments as getting NAKs,
for that reason.


> ---
>  drivers/spi/spi_bfin5xx.c |   12 ++++++++++--
>  1 files changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
> index a7c8976..e293d19 100644
> --- a/drivers/spi/spi_bfin5xx.c
> +++ b/drivers/spi/spi_bfin5xx.c
> @@ -559,9 +559,13 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id)
>  	struct driver_data *drv_data = dev_id;
>  	struct chip_data *chip = drv_data->cur_chip;
>  	struct spi_message *msg = drv_data->cur_msg;
> +	unsigned short dmastat = get_dma_curr_irqstat(drv_data->dma_channel);
>  	u16 spistat = read_STAT(drv_data);
>  
> -	dev_dbg(&drv_data->pdev->dev, "in dma_irq_handler\n");
> +	dev_dbg(&drv_data->pdev->dev,
> +		"in dma_irq_handler dmastat:0x%x spistat:0x%x\n",
> +		dmastat, spistat);
> +
>  	clear_dma_irqstat(drv_data->dma_channel);
>  
>  	/* Wait for DMA to complete */
> @@ -631,6 +635,7 @@ static void pump_transfers(unsigned long data)
>  
>  	 /* Handle for abort */
>  	if (message->state == ERROR_STATE) {
> +		dev_dbg(&drv_data->pdev->dev, "transfer: we've hit an error\n");
>  		message->status = -EIO;
>  		giveback(drv_data);
>  		return;
> @@ -638,6 +643,7 @@ static void pump_transfers(unsigned long data)
>  
>  	/* Handle end of message */
>  	if (message->state == DONE_STATE) {
> +		dev_dbg(&drv_data->pdev->dev, "transfer: all done!\n");
>  		message->status = 0;
>  		giveback(drv_data);
>  		return;
> @@ -645,6 +651,7 @@ static void pump_transfers(unsigned long data)
>  
>  	/* Delay if requested at end of transfer */
>  	if (message->state == RUNNING_STATE) {
> +		dev_dbg(&drv_data->pdev->dev, "transfer: still running ...\n");
>  		previous = list_entry(transfer->transfer_list.prev,
>  				      struct spi_transfer, transfer_list);
>  		if (previous->delay_usecs)
> @@ -805,7 +812,8 @@ static void pump_transfers(unsigned long data)
>  		dma_config = (RESTART | dma_width | DI_EN);
>  		if (drv_data->rx != NULL) {
>  			/* set transfer mode, and enable SPI */
> -			dev_dbg(&drv_data->pdev->dev, "doing DMA in.\n");
> +			dev_dbg(&drv_data->pdev->dev, "doing DMA in to %p (size %zx)\n",
> +				drv_data->rx, drv_data->len_in_bytes);
>  
>  			/* invalidate caches, if needed */
>  			if (bfin_addr_dcachable((unsigned long) drv_data->rx))
> -- 
> 1.5.6.3
> 
> 


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