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>
diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
index aee8873..4cac27d 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 @@
}
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;