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

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 af0642856521fb585509fbd7d48c90c9bccda22b..23f16ad8e8cfc822521fbdee6f6bd025e8d2d851 100644 (file)
--- 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;

diff --git a/target/linux/brcm63xx/patches-3.14/420-BCM63XX-add-endian-check-for-ath9k.patch b/target/linux/brcm63xx/patches-3.14/420-BCM63XX-add-endian-check-for-ath9k.patch
index 0809d785bd4eedc0af632e104e15c9b5140a6cd6..24b91bbb5626be15ceb4a043a83a4a6d474b7659 100644 (file)
--- a/target/linux/brcm63xx/patches-3.14/420-BCM63XX-add-endian-check-for-ath9k.patch
+++ b/target/linux/brcm63xx/patches-3.14/420-BCM63XX-add-endian-check-for-ath9k.patch
@@ -21,7 +21,7 @@
  /*
 --- a/arch/mips/bcm63xx/pci-ath9k-fixup.c
 +++ b/arch/mips/bcm63xx/pci-ath9k-fixup.c
-@@ -174,12 +174,14 @@ static void ath9k_pci_fixup(struct pci_d
+@@ -181,12 +181,14 @@ static void ath9k_pci_fixup(struct pci_d
  }
  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ath9k_pci_fixup);
  

diff --git a/target/linux/brcm63xx/patches-3.14/421-BCM63XX-add-led-pin-for-ath9k.patch b/target/linux/brcm63xx/patches-3.14/421-BCM63XX-add-led-pin-for-ath9k.patch
index 0d4f761308519061f629bb522839f363dcb95aec..f10e10a8d1462b3899078b0c7041bc8561ee996c 100644 (file)
--- a/target/linux/brcm63xx/patches-3.14/421-BCM63XX-add-led-pin-for-ath9k.patch
+++ b/target/linux/brcm63xx/patches-3.14/421-BCM63XX-add-led-pin-for-ath9k.patch
@@ -11,7 +11,7 @@
  }
 --- a/arch/mips/bcm63xx/pci-ath9k-fixup.c
 +++ b/arch/mips/bcm63xx/pci-ath9k-fixup.c
-@@ -175,13 +175,14 @@ static void ath9k_pci_fixup(struct pci_d
+@@ -182,13 +182,14 @@ static void ath9k_pci_fixup(struct pci_d
  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ath9k_pci_fixup);
  
  void __init pci_enable_ath9k_fixup(unsigned slot, u32 offset,