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authorMartin Schiller <ms@dev.tdt.de>2019-10-25 09:22:29 +0200
committerDaniel Golle <daniel@makrotopia.org>2019-11-09 17:54:24 +0100
commit9834c3dae030d59df6302d1063fec491de180e9f (patch)
tree96a93cef5557ffd15ca590160678ede2baf4551b /target/linux/generic
parent799de7c641ffa98323929a20a8d92c7cc4ebb251 (diff)
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kernel: fix LED netdev trigger on interface rename
This fixes the netdev LED trigger for interfaces, which are renamed during initialization (e.g. ppp interfaces). Fixes: FS#2193 Fixes: FS#2239 Signed-off-by: Martin Schiller <ms@dev.tdt.de> Signed-off-by: Daniel Golle <daniel@makrotopia.org> (cherry picked from commit edbadec843a77286d4f690a3641b7bca97f4c998)
Diffstat (limited to 'target/linux/generic')
-rw-r--r--target/linux/generic/backport-4.14/402-leds-trigger-netdev-fix-handling-on-interface-rename.patch49
1 files changed, 49 insertions, 0 deletions
diff --git a/target/linux/generic/backport-4.14/402-leds-trigger-netdev-fix-handling-on-interface-rename.patch b/target/linux/generic/backport-4.14/402-leds-trigger-netdev-fix-handling-on-interface-rename.patch
new file mode 100644
index 0000000000..ae7d6e8bcb
--- /dev/null
+++ b/target/linux/generic/backport-4.14/402-leds-trigger-netdev-fix-handling-on-interface-rename.patch
@@ -0,0 +1,49 @@
+From 0ff035231edca3713c3d0839c44e64a4ac41ef38 Mon Sep 17 00:00:00 2001
+From: Martin Schiller <ms@dev.tdt.de>
+Date: Thu, 24 Oct 2019 15:09:23 +0200
+Subject: [PATCH] leds: trigger: netdev: fix handling on interface rename
+
+The NETDEV_CHANGENAME code is not "unneeded" like it is stated in commit
+4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface
+rename").
+
+The event was accidentally misinterpreted equivalent to
+NETDEV_UNREGISTER, but should be equivalent to NETDEV_REGISTER.
+
+This was the case in the original code from the openwrt project.
+
+Otherwise, you are unable to set netdev led triggers for (non-existent)
+netdevices, which has to be renamed. This is the case, for example, for
+ppp interfaces in openwrt.
+
+Fixes: 06f502f57d0d ("leds: trigger: Introduce a NETDEV trigger")
+Fixes: 4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface rename")
+Signed-off-by: Martin Schiller <ms@dev.tdt.de>
+---
+ drivers/leds/trigger/ledtrig-netdev.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/drivers/leds/trigger/ledtrig-netdev.c
++++ b/drivers/leds/trigger/ledtrig-netdev.c
+@@ -299,10 +299,12 @@ static int netdev_trig_notify(struct not
+ notifier);
+
+ if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE
+- && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER)
++ && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER
++ && evt != NETDEV_CHANGENAME)
+ return NOTIFY_DONE;
+
+ if (!(dev == trigger_data->net_dev ||
++ (evt == NETDEV_CHANGENAME && !strcmp(dev->name, trigger_data->device_name)) ||
+ (evt == NETDEV_REGISTER && !strcmp(dev->name, trigger_data->device_name))))
+ return NOTIFY_DONE;
+
+@@ -312,6 +314,7 @@ static int netdev_trig_notify(struct not
+
+ clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+ switch (evt) {
++ case NETDEV_CHANGENAME:
+ case NETDEV_REGISTER:
+ if (trigger_data->net_dev)
+ dev_put(trigger_data->net_dev);