Commit 4fd3c467 authored by Vinicius Costa Gomes's avatar Vinicius Costa Gomes Committed by Vinod Koul
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dmaengine: idxd: Wait for submitted operations on .device_synchronize() 



When the dmaengine "core" asks the driver to synchronize, send a Drain
operation to the device workqueue, which will wait for the already
submitted operations to finish.

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-v3-6-7ed70658a9d1@intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 2a93f574

drivers/dma/idxd/dma.c

+8 −0
Original line number Diff line number Diff line
@@ -203,6 +203,13 @@ static int idxd_dma_terminate_all(struct dma_chan *c) 
	return 0;

}



static void idxd_dma_synchronize(struct dma_chan *c)

{

	struct idxd_wq *wq = to_idxd_wq(c);



	idxd_wq_drain(wq);

}



int idxd_register_dma_device(struct idxd_device *idxd)

{

	struct idxd_dma_dev *idxd_dma;
@@ -234,6 +241,7 @@ int idxd_register_dma_device(struct idxd_device *idxd) 
	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;

	dma->device_synchronize = idxd_dma_synchronize;



	rc = dma_async_device_register(dma);

	if (rc < 0) {