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sata_rcar: correct 'sata_rcar_sht' 

Using ATA_BMDMA_SHT() to intialize 'sata_rcar_sht' was suboptimal as
the R-Car descriptor table transfer counter is 28 bits wide (bit 1 to
bit 28), so that the 'dma_boundary' field of 0xFFFF is just too small,
as well as the 'sg_tablesize' field of 128.  Use ATA_BASE_SHT() to
initialize 'sata_rcar_sht' instead and give proper values to the
'dma_boundary' and 'sg_tablesize' fields explicitly.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Sergei Shtylyov 2013-05-28 02:45:08 +04:00 committed by Tejun Heo
parent 333279c82b
commit 8bfbeed586
1 changed files with 10 additions and 1 deletions
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11
drivers/ata/sata_rcar.c
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@ -121,6 +121,8 @@
/* Descriptor table word 0 bit (when DTA32M = 1) */
#define SATA_RCAR_DTEND BIT(0)
#define SATA_RCAR_DMA_BOUNDARY 0x1FFFFFFEUL
struct sata_rcar_priv {
void __iomem *base;
struct clk *clk;
@ -575,7 +577,14 @@ static u8 sata_rcar_bmdma_status(struct ata_port *ap)
}
static struct scsi_host_template sata_rcar_sht = {
ATA_BMDMA_SHT(DRV_NAME),
ATA_BASE_SHT(DRV_NAME),
/*
* This controller allows transfer chunks up to 512MB which cross 64KB
* boundaries, therefore the DMA limits are more relaxed than standard
* ATA SFF.
*/
.sg_tablesize = ATA_MAX_PRD,
.dma_boundary = SATA_RCAR_DMA_BOUNDARY,
};
static struct ata_port_operations sata_rcar_port_ops = {