From 11e31e281bd8f482a9277268f7b0d9c213584271 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Fri, 22 Feb 2019 09:59:59 -0700 Subject: [PATCH] dmaengine: ioatdma: disable DCA enabling on IOATDMA v3.4 IOATDMA v3.4 does not support DCA. Disable Signed-off-by: Dave Jiang Signed-off-by: Vinod Koul --- drivers/dma/ioat/hw.h | 1 + drivers/dma/ioat/init.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/drivers/dma/ioat/hw.h b/drivers/dma/ioat/hw.h index 3e38877..781c94d 100644 --- a/drivers/dma/ioat/hw.h +++ b/drivers/dma/ioat/hw.h @@ -73,6 +73,7 @@ #define IOAT_VER_3_0 0x30 /* Version 3.0 */ #define IOAT_VER_3_2 0x32 /* Version 3.2 */ #define IOAT_VER_3_3 0x33 /* Version 3.3 */ +#define IOAT_VER_3_4 0x34 /* Version 3.4 */ int system_has_dca_enabled(struct pci_dev *pdev); diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index 3161dfb..58dd1bf 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -1353,6 +1353,8 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) pci_set_drvdata(pdev, device); device->version = readb(device->reg_base + IOAT_VER_OFFSET); + if (device->version >= IOAT_VER_3_4) + ioat_dca_enabled = 0; if (device->version >= IOAT_VER_3_0) { if (is_skx_ioat(pdev)) device->version = IOAT_VER_3_2; -- 2.7.4