This is a note to let you know that I've just added the patch titled
dmaengine: ioatdma: workaround SKX ioatdma version
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dmaengine-ioatdma-workaround-skx-ioatdma-version.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Aug 4 15:15:51 PDT 2017
From: Dave Jiang <dave.jiang@xxxxxxxxx>
Date: Tue, 13 Dec 2016 11:15:27 -0700
Subject: dmaengine: ioatdma: workaround SKX ioatdma version
From: Dave Jiang <dave.jiang@xxxxxxxxx>
[ Upstream commit 34a31f0af84158955a9747fb5c6712da5bbb5331 ]
The Skylake ioatdma is technically CBDMA 3.2+ and contains the same hardware
bits with some additional 3.3 features, but it's not really 3.3 where the
driver is concerned.
Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Signed-off-by: Vinod Koul <vinod.koul@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/dma/ioat/init.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -1357,6 +1357,8 @@ static int ioat_pci_probe(struct pci_dev
device->version = readb(device->reg_base + IOAT_VER_OFFSET);
if (device->version >= IOAT_VER_3_0) {
+ if (is_skx_ioat(pdev))
+ device->version = IOAT_VER_3_2;
err = ioat3_dma_probe(device, ioat_dca_enabled);
if (device->version >= IOAT_VER_3_3)
Patches currently in stable-queue which might be from dave.jiang@xxxxxxxxx are
queue-4.4/dmaengine-ioatdma-add-skylake-pci-dev-id.patch
queue-4.4/dmaengine-ioatdma-workaround-skx-ioatdma-version.patch