mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-02 07:04:24 +00:00
Code Issues Releases Wiki Activity

dmaengine: zynqmp_dma: Correctly handle descriptor callbacks

Browse source 
DMA clients can provide one of two types of callbacks. For this reason
dmaengine drivers should not directly invoke `callback`, but always use
`dmaengine_desc_callback_invoke()`. This makes sure that both types of
callbacks are handled correctly.

The zynqmp_dma driver currently doesn't do this and only handles the
`callback` type callback. If the client used the `callback_result` type
callback it will not be called.

Fix this by switching to `dmaengine_desc_callback_valid()` and
`dmaengine_desc_callback_invoke()`.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211025075428.2094-3-lars@metafoo.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2021-10-25 09:54:28 +02:00 committed by Vinod Koul
parent a63ddc3857
commit 1825ecc908
1 changed files with 4 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/dma/xilinx/zynqmp_dma.c
View file

@ -605,14 +605,12 @@ static void zynqmp_dma_chan_desc_cleanup(struct zynqmp_dma_chan *chan)
spin_lock_irqsave(&chan->lock, irqflags);
list_for_each_entry_safe(desc, next, &chan->done_list, node) {
dma_async_tx_callback callback;
void *callback_param;
struct dmaengine_desc_callback cb;
callback = desc->async_tx.callback;
callback_param = desc->async_tx.callback_param;
if (callback) {
dmaengine_desc_get_callback(&desc->async_tx, &cb);
if (dmaengine_desc_callback_valid(&cb)) {
spin_unlock_irqrestore(&chan->lock, irqflags);
callback(callback_param);
dmaengine_desc_callback_invoke(&cb, NULL);
spin_lock_irqsave(&chan->lock, irqflags);
}