From 194ec9368c0dbc421acdb2620d4dfb3cc3d022ff Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Thu, 14 May 2015 15:28:24 +0100 Subject: drivers: of/base: move of_init to driver_init Commit 5590f3196b29 ("drivers/core/of: Add symlink to device-tree from devices with an OF node") adds the symlink `of_node` for each device pointing to it's device tree node while creating/initialising it. However the devicetree sysfs is created and setup in of_init which is executed at core_initcall level. For all the devices created before of_init, the following error is thrown: "Error -2(-ENOENT) creating of_node link" Like many other components in driver model, initialize the sysfs support for OF/devicetree from driver_init so that it's ready before any devices are created. Fixes: 5590f3196b29 ("drivers/core/of: Add symlink to device-tree from devices with an OF node") Suggested-by: Rob Herring Cc: Grant Likely Cc: Pawel Moll Cc: Benjamin Herrenschmidt Signed-off-by: Sudeep Holla Tested-by: Robert Schwebel Acked-by: Rob Herring Signed-off-by: Greg Kroah-Hartman --- drivers/base/init.c | 2 ++ drivers/of/base.c | 8 +++----- include/linux/of.h | 6 ++++++ 3 files changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/base/init.c b/drivers/base/init.c index da033d3..48c0e22 100644 --- a/drivers/base/init.c +++ b/drivers/base/init.c @@ -8,6 +8,7 @@ #include #include #include +#include #include "base.h" @@ -34,4 +35,5 @@ void __init driver_init(void) cpu_dev_init(); memory_dev_init(); container_dev_init(); + of_core_init(); } diff --git a/drivers/of/base.c b/drivers/of/base.c index 99764db..f065026 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -189,7 +189,7 @@ int __of_attach_node_sysfs(struct device_node *np) return 0; } -static int __init of_init(void) +void __init of_core_init(void) { struct device_node *np; @@ -198,7 +198,8 @@ static int __init of_init(void) of_kset = kset_create_and_add("devicetree", NULL, firmware_kobj); if (!of_kset) { mutex_unlock(&of_mutex); - return -ENOMEM; + pr_err("devicetree: failed to register existing nodes\n"); + return; } for_each_of_allnodes(np) __of_attach_node_sysfs(np); @@ -207,10 +208,7 @@ static int __init of_init(void) /* Symlink in /proc as required by userspace ABI */ if (of_root) proc_symlink("device-tree", NULL, "/sys/firmware/devicetree/base"); - - return 0; } -core_initcall(of_init); static struct property *__of_find_property(const struct device_node *np, const char *name, int *lenp) diff --git a/include/linux/of.h b/include/linux/of.h index ddeaae6..b871ff9 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -121,6 +121,8 @@ extern struct device_node *of_stdout; extern raw_spinlock_t devtree_lock; #ifdef CONFIG_OF +void of_core_init(void); + static inline bool is_of_node(struct fwnode_handle *fwnode) { return fwnode && fwnode->type == FWNODE_OF; @@ -376,6 +378,10 @@ bool of_console_check(struct device_node *dn, char *name, int index); #else /* CONFIG_OF */ +static inline void of_core_init(void) +{ +} + static inline bool is_of_node(struct fwnode_handle *fwnode) { return false; -- cgit v1.1