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[PATCH] MIPS: Turn on PCI 2.1 compatability for Malta's PIIX4 controller

To: linux-mips@linux-mips.org
Subject: [PATCH] MIPS: Turn on PCI 2.1 compatability for Malta's PIIX4 controller.
From: "Steven J. Hill" <sjhill@mips.com>
Date: Fri, 29 Jun 2012 13:02:27 -0500
Cc: "Steven J. Hill" <sjhill@mips.com>, ralf@linux-mips.org
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From: "Steven J. Hill" <sjhill@mips.com>

Signed-off-by: Steven J. Hill <sjhill@mips.com>
---
 arch/mips/mti-malta/malta-setup.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/mips/mti-malta/malta-setup.c 
b/arch/mips/mti-malta/malta-setup.c
index 2e28f65..f3532bf 100644
--- a/arch/mips/mti-malta/malta-setup.c
+++ b/arch/mips/mti-malta/malta-setup.c
@@ -222,3 +222,17 @@ void __init plat_mem_setup(void)
        board_be_init = malta_be_init;
        board_be_handler = malta_be_handler;
 }
+
+/* Enable PCI 2.1 compatibility in PIIX4. */
+static void __init quirk_dlcsetup(struct pci_dev *dev)
+{
+       u8 dlc;
+
+       /* Enable passive releases and delayed transactions. */
+       (void) pci_read_config_byte(dev, 0x82, &dlc);
+       dlc |= 7;
+       (void) pci_write_config_byte(dev, 0x82, dlc);
+}
+
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
+                       quirk_dlcsetup);
-- 
1.7.11.1


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