On Wed, Jul 11, 2012 at 05:00:53PM +0800, Qiang Liu wrote:
> Delete attribute DMA_INTERRUPT because fsl-dma doesn't support this function,
> exception will be thrown if talitos is used to offload xor at the same time.
>
Both drivers/misc/carma/carma-fpga.c and
drivers/misc/carma/carma-fpga-program.c expect the DMA_INTERRUPT
property, though they do not use it. The mask is set for historical
reasons. It is safe to delete the line "dma_cap_set(DMA_INTERRUPT, mask);"
from both drivers.
I don't know which other drivers may expect this feature to be present.
These are only the ones which I maintain.
Other than that, you can add my:
Acked-by: Ira W. Snyder <iws@xxxxxxxxxxxxxxxx>
> Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
> Cc: Vinod Koul <vinod.koul@xxxxxxxxx>
> Cc: Li Yang <leoli@xxxxxxxxxxxxx>
> Signed-off-by: Qiang Liu <qiang.liu@xxxxxxxxxxxxx>
> ---
> drivers/dma/fsldma.c | 31 -------------------------------
> 1 files changed, 0 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
> index 8f84761..4f2f212 100644
> --- a/drivers/dma/fsldma.c
> +++ b/drivers/dma/fsldma.c
> @@ -543,35 +543,6 @@ static void fsl_dma_free_chan_resources(struct dma_chan *dchan)
> }
>
> static struct dma_async_tx_descriptor *
> -fsl_dma_prep_interrupt(struct dma_chan *dchan, unsigned long flags)
> -{
> - struct fsldma_chan *chan;
> - struct fsl_desc_sw *new;
> -
> - if (!dchan)
> - return NULL;
> -
> - chan = to_fsl_chan(dchan);
> -
> - new = fsl_dma_alloc_descriptor(chan);
> - if (!new) {
> - chan_err(chan, "%s\n", msg_ld_oom);
> - return NULL;
> - }
> -
> - new->async_tx.cookie = -EBUSY;
> - new->async_tx.flags = flags;
> -
> - /* Insert the link descriptor to the LD ring */
> - list_add_tail(&new->node, &new->tx_list);
> -
> - /* Set End-of-link to the last link descriptor of new list */
> - set_ld_eol(chan, new);
> -
> - return &new->async_tx;
> -}
> -
> -static struct dma_async_tx_descriptor *
> fsl_dma_prep_memcpy(struct dma_chan *dchan,
> dma_addr_t dma_dst, dma_addr_t dma_src,
> size_t len, unsigned long flags)
> @@ -1352,12 +1323,10 @@ static int __devinit fsldma_of_probe(struct platform_device *op)
> fdev->irq = irq_of_parse_and_map(op->dev.of_node, 0);
>
> dma_cap_set(DMA_MEMCPY, fdev->common.cap_mask);
> - dma_cap_set(DMA_INTERRUPT, fdev->common.cap_mask);
> dma_cap_set(DMA_SG, fdev->common.cap_mask);
> dma_cap_set(DMA_SLAVE, fdev->common.cap_mask);
> fdev->common.device_alloc_chan_resources = fsl_dma_alloc_chan_resources;
> fdev->common.device_free_chan_resources = fsl_dma_free_chan_resources;
> - fdev->common.device_prep_dma_interrupt = fsl_dma_prep_interrupt;
> fdev->common.device_prep_dma_memcpy = fsl_dma_prep_memcpy;
> fdev->common.device_prep_dma_sg = fsl_dma_prep_sg;
> fdev->common.device_tx_status = fsl_tx_status;
> --
> 1.7.5.1
>
>
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