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| author | Linus Walleij <linus.walleij@stericsson.com> | 2010-12-22 23:13:37 +0100 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-12-23 21:06:46 -0700 |
| commit | 082086f2ce53c69260396e977d29972128def1d7 (patch) | |
| tree | f06554960ae266151e300193608f543863318783 /drivers/spi | |
| parent | b729889686afb7d4366e07fe9c2f7a2737166462 (diff) | |
| download | linux-3.10-082086f2ce53c69260396e977d29972128def1d7.tar.gz linux-3.10-082086f2ce53c69260396e977d29972128def1d7.tar.bz2 linux-3.10-082086f2ce53c69260396e977d29972128def1d7.zip | |
spi/pl022: pass the returned sglen to the DMA engine
The sglen return by the dma_map_sg() should be passed to the DMA
engine, not the one passed in. If we one day have a DMA mapper
that can coalesce entries, this will bug due to a too large
number of entries being passed in.
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>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/amba-pl022.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c index e29751af5c7..36ec1327a19 100644 --- a/drivers/spi/amba-pl022.c +++ b/drivers/spi/amba-pl022.c @@ -917,7 +917,7 @@ static int configure_dma(struct pl022 *pl022) }; unsigned int pages; int ret; - int sglen; + int rx_sglen, tx_sglen; struct dma_chan *rxchan = pl022->dma_rx_channel; struct dma_chan *txchan = pl022->dma_tx_channel; struct dma_async_tx_descriptor *rxdesc; @@ -991,20 +991,20 @@ static int configure_dma(struct pl022 *pl022) pl022->cur_transfer->len, &pl022->sgt_tx); /* Map DMA buffers */ - sglen = dma_map_sg(rxchan->device->dev, pl022->sgt_rx.sgl, + rx_sglen = dma_map_sg(rxchan->device->dev, pl022->sgt_rx.sgl, pl022->sgt_rx.nents, DMA_FROM_DEVICE); - if (!sglen) + if (!rx_sglen) goto err_rx_sgmap; - sglen = dma_map_sg(txchan->device->dev, pl022->sgt_tx.sgl, + tx_sglen = dma_map_sg(txchan->device->dev, pl022->sgt_tx.sgl, pl022->sgt_tx.nents, DMA_TO_DEVICE); - if (!sglen) + if (!tx_sglen) goto err_tx_sgmap; /* Send both scatterlists */ rxdesc = rxchan->device->device_prep_slave_sg(rxchan, pl022->sgt_rx.sgl, - pl022->sgt_rx.nents, + rx_sglen, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!rxdesc) @@ -1012,7 +1012,7 @@ static int configure_dma(struct pl022 *pl022) txdesc = txchan->device->device_prep_slave_sg(txchan, pl022->sgt_tx.sgl, - pl022->sgt_tx.nents, + tx_sglen, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!txdesc) |