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-rw-r--r--target/linux/brcm47xx/patches-3.14/791-tg3-no-pci-sleep.patch17
1 files changed, 17 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.14/791-tg3-no-pci-sleep.patch b/target/linux/brcm47xx/patches-3.14/791-tg3-no-pci-sleep.patch
new file mode 100644
index 0000000..cb46f46
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.14/791-tg3-no-pci-sleep.patch
@@ -0,0 +1,17 @@
+When the Ethernet controller is powered down and someone wants to
+access the mdio bus like the witch driver (b53) the system crashed if
+PCI_D3hot was set before. This patch deactivates this power sawing mode
+when a switch driver is in use.
+
+--- a/drivers/net/ethernet/broadcom/tg3.c
++++ b/drivers/net/ethernet/broadcom/tg3.c
+@@ -4269,7 +4269,8 @@ static int tg3_power_down_prepare(struct
+ static void tg3_power_down(struct tg3 *tp)
+ {
+ pci_wake_from_d3(tp->pdev, tg3_flag(tp, WOL_ENABLE));
+- pci_set_power_state(tp->pdev, PCI_D3hot);
++ if (!tg3_flag(tp, ROBOSWITCH))
++ pci_set_power_state(tp->pdev, PCI_D3hot);
+ }
+
+ static void tg3_aux_stat_to_speed_duplex(struct tg3 *tp, u32 val, u16 *speed, u8 *duplex)