From: Ganesan Ramalingam <ganesanr@broadcom.com>
Date: Wed, 17 Jul 2013 10:27:25 +0000 (+0000)
Subject: MIPS: Netlogic: Fix USB block's coherent DMA mask
X-Git-Tag: firefly_0821_release~176^2~5668^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=35ac7840bca23a0fcfb53cc433ae1fd6dc6d35c0;p=firefly-linux-kernel-4.4.55.git

MIPS: Netlogic: Fix USB block's coherent DMA mask

The on-chip USB controller on Netlogic XLP does not suppport
DMA beyond 32-bit physical address. Set the coherent_dma_mask
of the USB in its PCI fixup to support this.

Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C. <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5596/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/netlogic/xlp/usb-init.c b/arch/mips/netlogic/xlp/usb-init.c
index 9c401dd78337..ef3897ef0dc7 100644
--- a/arch/mips/netlogic/xlp/usb-init.c
+++ b/arch/mips/netlogic/xlp/usb-init.c
@@ -119,7 +119,7 @@ static u64 xlp_usb_dmamask = ~(u32)0;
 static void nlm_usb_fixup_final(struct pci_dev *dev)
 {
 	dev->dev.dma_mask		= &xlp_usb_dmamask;
-	dev->dev.coherent_dma_mask	= DMA_BIT_MASK(64);
+	dev->dev.coherent_dma_mask	= DMA_BIT_MASK(32);
 	switch (dev->devfn) {
 	case 0x10:
 		dev->irq = PIC_EHCI_0_IRQ;