On Thu, Aug 06, 2015 at 08:49:33AM +0530, Punnaiah Choudary Kalluri wrote:
> + list_for_each_entry_safe(desc, next, &chan->done_list, node) {
> + dma_async_tx_callback callback;
> + void *callback_param;
> +
> + list_del(&desc->node);
> +
> + callback = desc->async_tx.callback;
> + callback_param = desc->async_tx.callback_param;
> + if (callback) {
> + if (in_interrupt())
> + spin_unlock_bh(&chan->lock);
> + else
> + spin_unlock(&chan->lock);
This looks bad!
Why would callback be called from different context. It should only be
invoked from your tasklet
> +static int zynqmp_dma_device_terminate_all(struct dma_chan *dchan)
> +{
> + struct zynqmp_dma_chan *chan = to_chan(dchan);
> +
> + spin_lock_bh(&chan->lock);
> + zynqmp_dma_reset(chan);
> + spin_unlock_bh(&chan->lock);
No descriptor cleanup
> +static void zynqmp_dma_chan_remove(struct zynqmp_dma_chan *chan)
> +{
> + if (!chan)
> + return;
> +
> + devm_free_irq(chan->zdev->dev, chan->irq, chan);
> + tasklet_kill(&chan->tasklet);
> + list_del(&chan->common.device_node);
not deregistering with dmaengine?
> + zdev->chan = chan;
> + tasklet_init(&chan->tasklet, zynqmp_dma_do_tasklet, (ulong)chan);
> + 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);
You can simmplify this by using vchan framework!
> +MODULE_AUTHOR("Xilinx, Inc.");
> +MODULE_DESCRIPTION("Xilinx ZynqMP DMA driver");
> +MODULE_LICENSE("GPL");
No alias, how did it get loaded?
--
~Vinod
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