From: Dave Jiang <dave.jiang@intel.com> mainline inclusion from mainline-v5.1-rc1 commit 11e31e281bd8f482a9277268f7b0d9c213584271 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I47H3V CVE: NA -------------------------------- commit 11e31e281bd8f482a9277268f7b0d9c213584271 upstream. IOATDMA v3.4 does not support DCA. Disable Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Lin Wang <lin.x.wang@intel.com> Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- 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 3e38877cae6b9..781c94de8e810 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 ec5d0ac295d92..9f9e9488fd185 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -1360,6 +1360,8 @@ 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; -- 2.25.1