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authorFelix Fietkau <nbd@nbd.name>2017-01-19 14:25:09 +0100
committerFelix Fietkau <nbd@nbd.name>2017-01-19 14:25:44 +0100
commit254ccf9f4ca608efd1674f2cc47b44b86a3a63f4 (patch)
tree31ad7577320ea11b473410170de2eb40a66bd622
parent5aa03e16a732e81a989a9605706dc8c6bb95d03f (diff)
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lantiq: fix an ethernet stability issue triggered by receving packets during boot
Disabling ethernet during reboot (only to enable it again when the ethernet driver attaches) can put the chip into a faulty state where it corrupts the header of all incoming packets. This happens if packets arrive during the time window where the core is disabled, and it can be easily reproduced by rebooting while sending a flood ping to the broadcast address. Signed-off-by: Felix Fietkau <nbd@nbd.name>
-rw-r--r--target/linux/lantiq/patches-4.4/0070-MIPS-Lantiq-Keep-ethernet-enabled-during-boot.patch53
1 files changed, 53 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-4.4/0070-MIPS-Lantiq-Keep-ethernet-enabled-during-boot.patch b/target/linux/lantiq/patches-4.4/0070-MIPS-Lantiq-Keep-ethernet-enabled-during-boot.patch
new file mode 100644
index 0000000000..67cf7d3a61
--- /dev/null
+++ b/target/linux/lantiq/patches-4.4/0070-MIPS-Lantiq-Keep-ethernet-enabled-during-boot.patch
@@ -0,0 +1,53 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Thu, 19 Jan 2017 14:14:36 +0100
+Subject: [PATCH] MIPS: Lantiq: Keep ethernet enabled during boot
+
+Disabling ethernet during reboot (only to enable it again when the
+ethernet driver attaches) can put the chip into a faulty state where it
+corrupts the header of all incoming packets.
+
+This happens if packets arrive during the time window where the core is
+disabled, and it can be easily reproduced by rebooting while sending a
+flood ping to the broadcast address.
+
+Cc: john@phrozen.org
+Cc: hauke.mehrtens@lantiq.com
+Cc: stable@vger.kernel.org
+Fixes: 95135bfa7ead ("MIPS: Lantiq: Deactivate most of the devices by default")
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/arch/mips/lantiq/xway/sysctrl.c
++++ b/arch/mips/lantiq/xway/sysctrl.c
+@@ -564,7 +564,7 @@ void __init ltq_soc_init(void)
+ clkdev_add_pmu("1a800000.pcie", "msi", 1, 1, PMU1_PCIE2_MSI);
+ clkdev_add_pmu("1a800000.pcie", "pdi", 1, 1, PMU1_PCIE2_PDI);
+ clkdev_add_pmu("1a800000.pcie", "ctl", 1, 1, PMU1_PCIE2_CTL);
+- clkdev_add_pmu("1e108000.eth", NULL, 1, 0, PMU_SWITCH | PMU_PPE_DP);
++ clkdev_add_pmu("1e108000.eth", NULL, 0, 0, PMU_SWITCH | PMU_PPE_DP);
+ clkdev_add_pmu("1da00000.usif", "NULL", 1, 0, PMU_USIF);
+ clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU);
+ } else if (of_machine_is_compatible("lantiq,ar10")) {
+@@ -572,7 +572,7 @@ void __init ltq_soc_init(void)
+ ltq_ar10_fpi_hz(), ltq_ar10_pp32_hz());
+ clkdev_add_pmu("1e101000.usb", "ctl", 1, 0, PMU_USB0);
+ clkdev_add_pmu("1e106000.usb", "ctl", 1, 0, PMU_USB1);
+- clkdev_add_pmu("1e108000.eth", NULL, 1, 0, PMU_SWITCH |
++ clkdev_add_pmu("1e108000.eth", NULL, 0, 0, PMU_SWITCH |
+ PMU_PPE_DP | PMU_PPE_TC);
+ clkdev_add_pmu("1da00000.usif", "NULL", 1, 0, PMU_USIF);
+ clkdev_add_pmu("1f203000.rcu", "gphy", 1, 0, PMU_GPHY);
+@@ -594,11 +594,11 @@ void __init ltq_soc_init(void)
+ clkdev_add_pmu(NULL, "ahb", 1, 0, PMU_AHBM | PMU_AHBS);
+
+ clkdev_add_pmu("1da00000.usif", "NULL", 1, 0, PMU_USIF);
+- clkdev_add_pmu("1e108000.eth", NULL, 1, 0,
++ clkdev_add_pmu("1e108000.eth", NULL, 0, 0,
+ PMU_SWITCH | PMU_PPE_DPLUS | PMU_PPE_DPLUM |
+ PMU_PPE_EMA | PMU_PPE_TC | PMU_PPE_SLL01 |
+ PMU_PPE_QSB | PMU_PPE_TOP);
+- clkdev_add_pmu("1f203000.rcu", "gphy", 1, 0, PMU_GPHY);
++ clkdev_add_pmu("1f203000.rcu", "gphy", 0, 0, PMU_GPHY);
+ clkdev_add_pmu("1e103000.sdio", NULL, 1, 0, PMU_SDIO);
+ clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU);
+ clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE);