On Fri, Jul 01, 2016 at 05:07:06PM +0530, Kedareswara rao Appana wrote:
> +static int zynqmp_dma_chan_probe(struct zynqmp_dma_device *zdev,
> + struct platform_device *pdev)
> +{
> + struct zynqmp_dma_chan *chan;
> + struct resource *res;
> + struct device_node *node = pdev->dev.of_node;
> + int err;
> +
> + chan = devm_kzalloc(zdev->dev, sizeof(*chan), GFP_KERNEL);
> + if (!chan)
> + return -ENOMEM;
> + chan->dev = zdev->dev;
> + chan->zdev = zdev;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + chan->regs = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(chan->regs))
> + return PTR_ERR(chan->regs);
> +
> + chan->bus_width = ZYNQMP_DMA_BUS_WIDTH_64;
> + chan->dst_burst_len = ZYNQMP_DMA_AWLEN_RST_VAL;
> + chan->src_burst_len = ZYNQMP_DMA_ARLEN_RST_VAL;
> + err = of_property_read_u32(node, "xlnx,bus-width", &chan->bus_width);
> + if ((err < 0) && ((chan->bus_width != ZYNQMP_DMA_BUS_WIDTH_64) ||
> + (chan->bus_width != ZYNQMP_DMA_BUS_WIDTH_128))) {
> + dev_err(zdev->dev, "invalid bus-width value");
> + return err;
> + }
> +
> + chan->is_dmacoherent = of_property_read_bool(node, "dma-coherent");
> + zdev->chan = chan;
> + tasklet_init(&chan->tasklet, zynqmp_dma_do_tasklet, (ulong)chan);
where is this killed?
> + spin_lock_init(&chan->lock);
> + INIT_LIST_HEAD(&chan->active_list);
> + INIT_LIST_HEAD(&chan->pending_list);
> + INIT_LIST_HEAD(&chan->done_list);
> + INIT_LIST_HEAD(&chan->free_list);
> +
> + dma_cookie_init(&chan->common);
> + chan->common.device = &zdev->common;
> + list_add_tail(&chan->common.device_node, &zdev->common.channels);
> +
> + zynqmp_dma_init(chan);
> + chan->irq = platform_get_irq(pdev, 0);
> + if (chan->irq < 0)
> + return -ENXIO;
> + err = devm_request_irq(&pdev->dev, chan->irq, zynqmp_dma_irq_handler, 0,
> + "zynqmp-dma", chan);
this needs to be freed/diabled in remove, dont see that
--
~Vinod
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