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| author | Dave Jiang <dave.jiang@intel.com> | 2021-01-15 14:53:07 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-04 11:37:57 +0100 |
| commit | 4f24543828faf117e1d1f89dae7df50c6e40c859 (patch) | |
| tree | cf77b9ce8a554f2f513f5bcef256044c22298483 | |
| parent | 31c9ba0c38bcfc515fd31b6d0a1167844c061631 (diff) | |
| download | linux-stable-4f24543828faf117e1d1f89dae7df50c6e40c859.tar.gz linux-stable-4f24543828faf117e1d1f89dae7df50c6e40c859.tar.bz2 linux-stable-4f24543828faf117e1d1f89dae7df50c6e40c859.zip | |
dmaengine: idxd: set DMA channel to be private
[ 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@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/dma/idxd/dma.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/dma/idxd/dma.c b/drivers/dma/idxd/dma.c index 8b14ba0bae1c..ec177a535d6d 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; |