Commit 7618d0359c16 ("dmaengine: ioatdma: Set non RAID channels to be
private capable") makes all non-RAID ioatdma channels as private to be
requestable by dma_request_channel(). With PQ CAP support going away for
ioatdma, this would make all channels private. To support the usage of
ioatdma for blk-mq implementation of pmem we need as many channels we can
share in order to be high performing. Thus reverting the patch.
Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
drivers/dma/ioat/init.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index 6ad4384..e437112 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -1163,9 +1163,6 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca)
}
}
- if (!(ioat_dma->cap & (IOAT_CAP_XOR | IOAT_CAP_PQ)))
- dma_cap_set(DMA_PRIVATE, dma->cap_mask);
-
err = ioat_probe(ioat_dma);
if (err)
return err;
--
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