From: Dave Jiang dave.jiang@intel.com
[ Upstream commit c06e424be5f5184468c5f761c0d2cf1ed0a4e0fc ]
Add DMA_PRIVATE attribute flag to idxd DMA channels. The dedicated WQs are expected to be used by a single client and not shared. While doing NTB testing this mistake was discovered, which prevented ntb_transport from requesting DSA wqs as DMA channels via dma_request_channel().
Reported-by: Srinijia Kambham srinija.kambham@intel.com Signed-off-by: Dave Jiang dave.jiang@intel.com Tested-by: Srinijia Kambham srinija.kambham@intel.com Fixes: 8f47d1a5e545 ("dmaengine: idxd: connect idxd to dmaengine subsystem") Link: https://lore.kernel.org/r/161074758743.2184057.3388557138816350980.stgit@dji... Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/idxd/dma.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/dma/idxd/dma.c b/drivers/dma/idxd/dma.c index 8b14ba0bae1cd..ec177a535d6dd 100644 --- a/drivers/dma/idxd/dma.c +++ b/drivers/dma/idxd/dma.c @@ -174,6 +174,7 @@ int idxd_register_dma_device(struct idxd_device *idxd) INIT_LIST_HEAD(&dma->channels); dma->dev = &idxd->pdev->dev;
+ dma_cap_set(DMA_PRIVATE, dma->cap_mask); dma_cap_set(DMA_COMPLETION_NO_ORDER, dma->cap_mask); dma->device_release = idxd_dma_release;