brcm63xx: 3.14: fix ath9k_pci_fixup

Since kernel commit 928bea964827 ("PCI: Delay enabling bridges until
they're needed"), pci fixups are run with bridges (e.g. the pcie port)
disabled.

This causses hangs when ath9k_pci_fixup tries to manually enable the
device to apply the register fixups.

Fix this by enabling any parent bridges before trying to access the
device itself.

Fixes boot on DSL-274XB rev F1.

Reported-by: Matteo Croce <matteo@openwrt.org>
Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 41856

1 files changed, 8 insertions, 1 deletions

diff --git a/target/linux/brcm63xx/patches-3.14/416-BCM63XX-add-a-fixup-for-ath9k-devices.patch b/target/linux/brcm63xx/patches-3.14/416-BCM63XX-add-a-fixup-for-ath9k-devices.patch
index af06428..23f16ad 100644
--- a/target/linux/brcm63xx/patches-3.14/416-BCM63XX-add-a-fixup-for-ath9k-devices.patch
+++ b/target/linux/brcm63xx/patches-3.14/416-BCM63XX-add-a-fixup-for-ath9k-devices.patch
@@ -24,7 +24,7 @@ Subject: [PATCH 61/72] BCM63XX: add a fixup for ath9k devices
  obj-y		+= boards/
 --- /dev/null
 +++ b/arch/mips/bcm63xx/pci-ath9k-fixup.c
-@@ -0,0 +1,192 @@
+@@ -0,0 +1,199 @@
 +/*
 + *  Broadcom BCM63XX Ath9k EEPROM fixup helper.
 + *
@@ -117,6 +117,7 @@ Subject: [PATCH 61/72] BCM63XX: add a fixup for ath9k devices
 +{
 +	void __iomem *mem;
 +	struct ath9k_platform_data *pdata = NULL;
++	struct pci_dev *bridge = pci_upstream_bridge(dev);
 +	u16 *cal_data = NULL;
 +	u16 cmd;
 +	u32 bar0;
@@ -161,6 +162,9 @@ Subject: [PATCH 61/72] BCM63XX: add a fixup for ath9k devices
 +		return;
 +	}
 +
++	if (bridge)
++		pci_enable_device(bridge);
++
 +	pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
 +	pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
 +	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, val);
@@ -195,6 +199,9 @@ Subject: [PATCH 61/72] BCM63XX: add a fixup for ath9k devices
 +
 +	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, bar0);
 +
++	if (bridge)
++		pci_disable_device(bridge);
++
 +	iounmap(mem);
 +
 +	dev->dev.platform_data = pdata;