From f0076436136751359e0886f3302a2a0b3a28ba6e Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Fri, 14 Oct 2016 14:40:33 +0100 Subject: [PATCH] r8169: set coherent DMA mask as well as streaming DMA mask PCI devices that are 64-bit DMA capable should set the coherent DMA mask as well as the streaming DMA mask. On some architectures, these are managed separately, and so the coherent DMA mask will be left at its default value of 32 if it is not set explicitly. This results in errors such as r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded hwdev DMA mask = 0x00000000ffffffff, dev_addr = 0x00000080fbfff000 swiotlb: coherent allocation failed for device 0000:02:00.0 size=4096 CPU: 0 PID: 1062 Comm: systemd-udevd Not tainted 4.8.0+ #35 Hardware name: AMD Seattle/Seattle, BIOS 10:53:24 Oct 13 2016 on systems without memory that is 32-bit addressable by PCI devices. Signed-off-by: Ard Biesheuvel Acked-by: Francois Romieu Signed-off-by: David S. Miller --- drivers/net/ethernet/realtek/r8169.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index e55638c7505a..bf000d819a21 100644 --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -8273,7 +8273,8 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) if ((sizeof(dma_addr_t) > 4) && (use_dac == 1 || (use_dac == -1 && pci_is_pcie(pdev) && tp->mac_version >= RTL_GIGA_MAC_VER_18)) && - !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { + !pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) && + !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) { /* CPlusCmd Dual Access Cycle is only needed for non-PCIe */ if (!pci_is_pcie(pdev)) -- 2.20.1