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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2016-04-26 11:03:05 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2016-05-10 18:29:18 +0200 |
| commit | 4ea8c205e5fd1f7cac8f634347f842e12d8af9b4 (patch) | |
| tree | 93afa90a90d3bf8189a465032240297e8a9530cb /drivers/ata | |
| parent | ata: sata_dwc_460ex: set dma_boundary to 0x1fff (diff) | |
| download | linux-4ea8c205e5fd1f7cac8f634347f842e12d8af9b4.tar.xz linux-4ea8c205e5fd1f7cac8f634347f842e12d8af9b4.zip | |
ata: sata_dwc_460ex: burst size must be in items not bytes
The burst size as defined by DMAengine API is in items of address width. Derive
burst size from AHB_DMA_BRST_DFLT (64 bytes) by dividing it to
DMA_SLAVE_BUSWIDTH_4_BYTES (4 bytes) that gives us 16 items.
Tested-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/sata_dwc_460ex.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c index aee887350fa3..4cac27de5163 100644 --- a/drivers/ata/sata_dwc_460ex.c +++ b/drivers/ata/sata_dwc_460ex.c @@ -65,7 +65,7 @@ #define NO_IRQ 0 #endif -#define AHB_DMA_BRST_DFLT 64 /* 16 data items burst length*/ +#define AHB_DMA_BRST_DFLT 64 /* 16 data items burst length */ enum { SATA_DWC_MAX_PORTS = 1, @@ -318,8 +318,8 @@ static struct dma_async_tx_descriptor *dma_dwc_xfer_setup(struct ata_queued_cmd } sconf.direction = qc->dma_dir; - sconf.src_maxburst = AHB_DMA_BRST_DFLT; - sconf.dst_maxburst = AHB_DMA_BRST_DFLT; + sconf.src_maxburst = AHB_DMA_BRST_DFLT / 4; /* in items */ + sconf.dst_maxburst = AHB_DMA_BRST_DFLT / 4; /* in items */ sconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; sconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |