linux-kernel - Re: [PATCH 10/18] ioat3: xor support

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Date:	Sun, 6 Sep 2009 07:33:36 +0200
From:	Pavel Machek <pavel@....cz>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
	maciej.sosnowski@...el.com
Subject: Re: [PATCH 10/18] ioat3: xor support


> +static struct dma_async_tx_descriptor *
> +__ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result,
> +		      dma_addr_t dest, dma_addr_t *src, unsigned int src_cnt,
> +		      size_t len, unsigned long flags)
> +{
> +	struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
> +	struct ioat_ring_ent *compl_desc;
> +	struct ioat_ring_ent *desc;
> +	struct ioat_ring_ent *ext;
> +	size_t total_len = len;
> +	struct ioat_xor_descriptor *xor;
> +	struct ioat_xor_ext_descriptor *xor_ex = NULL;
> +	struct ioat_dma_descriptor *hw;
> +	u32 offset = 0;
> +	int num_descs;
> +	int with_ext;
> +	int i;
> +	u16 idx;
> +	u8 op = result ? IOAT_OP_XOR_VAL : IOAT_OP_XOR;

Coalesce more variables on one line, so that declaration is shorter?

> --- a/drivers/dma/ioat/registers.h
> +++ b/drivers/dma/ioat/registers.h
> @@ -243,6 +243,8 @@
>  #define IOAT_CHANERR_XOR_Q_ERR			0x20000
>  #define IOAT_CHANERR_DESCRIPTOR_COUNT_ERR	0x40000
>  
> +#define IOAT_CHANERR_HANDLE_MASK (IOAT_CHANERR_XOR_P_OR_CRC_ERR | IOAT_CHANERR_XOR_Q_ERR)
> +
>  #define IOAT_CHANERR_MASK_OFFSET		0x2C	/* 32-bit Channel Error Register */
>  

80 columns?

-- 
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