Le 02/08/2013 18:57, Dan Williams a écrit :
> I like Jon¹s suggestion. Just make raid disabled by default on non-atom
> platforms. When if a non-atom platform comes along without the previous
> restrictions it can add itself to this list.
>
> So let¹s drop the module parameter and just cleanup the 3.2 support to
> reflect the current reality of raid being disabled.
So you want this instead ?
Brice
ioatdma: disable RAID on non-Atom platforms and reenable unaligned copies
Disable RAID on non-Atom platform and remove the 64-byte alignement
restriction on legacy DMA operations (introduced in commit f26df1a1
as a workaround for silicon errata).
Signed-off-by: Brice Goglin <brice.gog...@inria.fr>
---
drivers/dma/ioat/dma_v3.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
Index: b/drivers/dma/ioat/dma_v3.c
===================================================================
--- a/drivers/dma/ioat/dma_v3.c 2013-07-31 23:06:24.163810000 +0200
+++ b/drivers/dma/ioat/dma_v3.c 2013-08-02 19:17:26.075745688 +0200
@@ -1775,15 +1775,12 @@ int ioat3_dma_probe(struct ioatdma_devic
dma->device_alloc_chan_resources = ioat2_alloc_chan_resources;
dma->device_free_chan_resources = ioat2_free_chan_resources;
- if (is_xeon_cb32(pdev))
- dma->copy_align = 6;
-
dma_cap_set(DMA_INTERRUPT, dma->cap_mask);
dma->device_prep_dma_interrupt = ioat3_prep_interrupt_lock;
device->cap = readl(device->reg_base + IOAT_DMA_CAP_OFFSET);
- if (is_bwd_noraid(pdev))
+ if (is_xeon_cb32(pdev) || is_bwd_noraid(pdev))
device->cap &= ~(IOAT_CAP_XOR | IOAT_CAP_PQ |
IOAT_CAP_RAID16SS);
/* dca is incompatible with raid operations */
--
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