Commit 2a93f574 authored by Vinicius Costa Gomes's avatar Vinicius Costa Gomes Committed by Vinod Koul
Browse files

dmaengine: idxd: Flush all pending descriptors 



When used as a dmaengine, the DMA "core" might ask the driver to
terminate all pending requests, when that happens, flush all pending
descriptors.

In this context, flush means removing the requests from the pending
lists, so even if they are completed after, the user is not notified.

Reviewed-by: default avatarDave Jiang <dave.jiang@intel.com>
Signed-off-by: default avatarVinicius Costa Gomes <vinicius.gomes@intel.com>
Link: https://patch.msgid.link/20260121-idxd-fix-flr-on-kernel-queues-v3-v3-5-7ed70658a9d1@intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent f019d781

drivers/dma/idxd/dma.c

+10 −0
Original line number Diff line number Diff line
@@ -194,6 +194,15 @@ static void idxd_dma_release(struct dma_device *device) 
	kfree(idxd_dma);

}



static int idxd_dma_terminate_all(struct dma_chan *c)

{

	struct idxd_wq *wq = to_idxd_wq(c);



	idxd_wq_flush_descs(wq);



	return 0;

}



int idxd_register_dma_device(struct idxd_device *idxd)

{

	struct idxd_dma_dev *idxd_dma;
@@ -224,6 +233,7 @@ int idxd_register_dma_device(struct idxd_device *idxd) 
	dma->device_issue_pending = idxd_dma_issue_pending;

	dma->device_alloc_chan_resources = idxd_dma_alloc_chan_resources;

	dma->device_free_chan_resources = idxd_dma_free_chan_resources;

	dma->device_terminate_all = idxd_dma_terminate_all;



	rc = dma_async_device_register(dma);

	if (rc < 0) {