mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-03 15:47:36 +00:00
Code Issues Releases Wiki Activity

spi/pl022: map the buffers on the DMA engine

Browse source 
The struct device for the DMA engine is the apropriate one to use
when mapping/unmapping buffers. This is because the memory which
is addressable by DMA is determined by the DMA engine rather than
the device.

Reported-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Linus Walleij 2010-12-22 23:13:07 +01:00 committed by Grant Likely
parent 9d32af66aa
commit b729889686
1 changed files with 6 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
drivers/spi/amba-pl022.c
View file

@ -782,9 +782,9 @@ static void *next_transfer(struct pl022 *pl022)
static void unmap_free_dma_scatter(struct pl022 *pl022)
{
/* Unmap and free the SG tables */
dma_unmap_sg(&pl022->adev->dev, pl022->sgt_tx.sgl,
dma_unmap_sg(pl022->dma_tx_channel->device->dev, pl022->sgt_tx.sgl,
pl022->sgt_tx.nents, DMA_TO_DEVICE);
dma_unmap_sg(&pl022->adev->dev, pl022->sgt_rx.sgl,
dma_unmap_sg(pl022->dma_rx_channel->device->dev, pl022->sgt_rx.sgl,
pl022->sgt_rx.nents, DMA_FROM_DEVICE);
sg_free_table(&pl022->sgt_rx);
sg_free_table(&pl022->sgt_tx);
@ -991,12 +991,12 @@ static int configure_dma(struct pl022 *pl022)
pl022->cur_transfer->len, &pl022->sgt_tx);
/* Map DMA buffers */
sglen = dma_map_sg(&pl022->adev->dev, pl022->sgt_rx.sgl,
sglen = dma_map_sg(rxchan->device->dev, pl022->sgt_rx.sgl,
pl022->sgt_rx.nents, DMA_FROM_DEVICE);
if (!sglen)
goto err_rx_sgmap;
sglen = dma_map_sg(&pl022->adev->dev, pl022->sgt_tx.sgl,
sglen = dma_map_sg(txchan->device->dev, pl022->sgt_tx.sgl,
pl022->sgt_tx.nents, DMA_TO_DEVICE);
if (!sglen)
goto err_tx_sgmap;
@ -1040,10 +1040,10 @@ static int configure_dma(struct pl022 *pl022)
txchan->device->device_control(txchan, DMA_TERMINATE_ALL, 0);
err_rxdesc:
rxchan->device->device_control(rxchan, DMA_TERMINATE_ALL, 0);
dma_unmap_sg(&pl022->adev->dev, pl022->sgt_tx.sgl,
dma_unmap_sg(txchan->device->dev, pl022->sgt_tx.sgl,
pl022->sgt_tx.nents, DMA_TO_DEVICE);
err_tx_sgmap:
dma_unmap_sg(&pl022->adev->dev, pl022->sgt_rx.sgl,
dma_unmap_sg(rxchan->device->dev, pl022->sgt_rx.sgl,
pl022->sgt_tx.nents, DMA_FROM_DEVICE);
err_rx_sgmap:
sg_free_table(&pl022->sgt_tx);