From 8a26bbbb932021fd6ce8821ca8b2e6771b8ff7d2 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 18:08:00 +0200 Subject: clk: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. This cleans up the init code a lot, and there's no need to return an error value based on the debugfs calls, especially as it turns out no one was even looking at that return value. So it obviously wasn't that important :) Cc: Michael Turquette Signed-off-by: Greg Kroah-Hartman Signed-off-by: Stephen Boyd --- drivers/clk/clk.c | 129 +++++++++++++----------------------------------------- 1 file changed, 30 insertions(+), 99 deletions(-) (limited to 'drivers/clk/clk.c') diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index ea67ac81c6f9..ef701ce44439 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -2608,81 +2608,31 @@ static int possible_parents_show(struct seq_file *s, void *data) } DEFINE_SHOW_ATTRIBUTE(possible_parents); -static int clk_debug_create_one(struct clk_core *core, struct dentry *pdentry) +static void clk_debug_create_one(struct clk_core *core, struct dentry *pdentry) { - struct dentry *d; - int ret = -ENOMEM; - - if (!core || !pdentry) { - ret = -EINVAL; - goto out; - } - - d = debugfs_create_dir(core->name, pdentry); - if (!d) - goto out; - - core->dentry = d; - - d = debugfs_create_ulong("clk_rate", 0444, core->dentry, &core->rate); - if (!d) - goto err_out; - - d = debugfs_create_ulong("clk_accuracy", 0444, core->dentry, - &core->accuracy); - if (!d) - goto err_out; + struct dentry *root; - d = debugfs_create_u32("clk_phase", 0444, core->dentry, &core->phase); - if (!d) - goto err_out; - - d = debugfs_create_file("clk_flags", 0444, core->dentry, core, - &clk_flags_fops); - if (!d) - goto err_out; - - d = debugfs_create_u32("clk_prepare_count", 0444, core->dentry, - &core->prepare_count); - if (!d) - goto err_out; - - d = debugfs_create_u32("clk_enable_count", 0444, core->dentry, - &core->enable_count); - if (!d) - goto err_out; - - d = debugfs_create_u32("clk_protect_count", 0444, core->dentry, - &core->protect_count); - if (!d) - goto err_out; - - d = debugfs_create_u32("clk_notifier_count", 0444, core->dentry, - &core->notifier_count); - if (!d) - goto err_out; + if (!core || !pdentry) + return; - if (core->num_parents > 1) { - d = debugfs_create_file("clk_possible_parents", 0444, - core->dentry, core, &possible_parents_fops); - if (!d) - goto err_out; - } + root = debugfs_create_dir(core->name, pdentry); + core->dentry = root; - if (core->ops->debug_init) { - ret = core->ops->debug_init(core->hw, core->dentry); - if (ret) - goto err_out; - } + debugfs_create_ulong("clk_rate", 0444, root, &core->rate); + debugfs_create_ulong("clk_accuracy", 0444, root, &core->accuracy); + debugfs_create_u32("clk_phase", 0444, root, &core->phase); + debugfs_create_file("clk_flags", 0444, root, core, &clk_flags_fops); + debugfs_create_u32("clk_prepare_count", 0444, root, &core->prepare_count); + debugfs_create_u32("clk_enable_count", 0444, root, &core->enable_count); + debugfs_create_u32("clk_protect_count", 0444, root, &core->protect_count); + debugfs_create_u32("clk_notifier_count", 0444, root, &core->notifier_count); - ret = 0; - goto out; + if (core->num_parents > 1) + debugfs_create_file("clk_possible_parents", 0444, root, core, + &possible_parents_fops); -err_out: - debugfs_remove_recursive(core->dentry); - core->dentry = NULL; -out: - return ret; + if (core->ops->debug_init) + core->ops->debug_init(core->hw, core->dentry); } /** @@ -2693,17 +2643,13 @@ out: * initialized. Otherwise it bails out early since the debugfs clk directory * will be created lazily by clk_debug_init as part of a late_initcall. */ -static int clk_debug_register(struct clk_core *core) +static void clk_debug_register(struct clk_core *core) { - int ret = 0; - mutex_lock(&clk_debug_lock); hlist_add_head(&core->debug_node, &clk_debug_list); if (inited) - ret = clk_debug_create_one(core, rootdir); + clk_debug_create_one(core, rootdir); mutex_unlock(&clk_debug_lock); - - return ret; } /** @@ -2748,32 +2694,17 @@ EXPORT_SYMBOL_GPL(clk_debugfs_add_file); static int __init clk_debug_init(void) { struct clk_core *core; - struct dentry *d; rootdir = debugfs_create_dir("clk", NULL); - if (!rootdir) - return -ENOMEM; - - d = debugfs_create_file("clk_summary", 0444, rootdir, &all_lists, - &clk_summary_fops); - if (!d) - return -ENOMEM; - - d = debugfs_create_file("clk_dump", 0444, rootdir, &all_lists, - &clk_dump_fops); - if (!d) - return -ENOMEM; - - d = debugfs_create_file("clk_orphan_summary", 0444, rootdir, - &orphan_list, &clk_summary_fops); - if (!d) - return -ENOMEM; - - d = debugfs_create_file("clk_orphan_dump", 0444, rootdir, - &orphan_list, &clk_dump_fops); - if (!d) - return -ENOMEM; + debugfs_create_file("clk_summary", 0444, rootdir, &all_lists, + &clk_summary_fops); + debugfs_create_file("clk_dump", 0444, rootdir, &all_lists, + &clk_dump_fops); + debugfs_create_file("clk_orphan_summary", 0444, rootdir, &orphan_list, + &clk_summary_fops); + debugfs_create_file("clk_orphan_dump", 0444, rootdir, &orphan_list, + &clk_dump_fops); mutex_lock(&clk_debug_lock); hlist_for_each_entry(core, &clk_debug_list, debug_node) @@ -2786,7 +2717,7 @@ static int __init clk_debug_init(void) } late_initcall(clk_debug_init); #else -static inline int clk_debug_register(struct clk_core *core) { return 0; } +static inline void clk_debug_register(struct clk_core *core) { } static inline void clk_debug_reparent(struct clk_core *core, struct clk_core *new_parent) { -- cgit v1.2.3 From c1c2873df06372a108976599583eba7e47483379 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 29 May 2018 18:08:04 +0200 Subject: clk: remove clk_debugfs_add_file() No one was using this api call, so remove it. If it is ever needed in the future, a "raw" debugfs call can be used. Cc: Michael Turquette Cc: Stephen Boyd Signed-off-by: Greg Kroah-Hartman Signed-off-by: Stephen Boyd --- drivers/clk/clk.c | 13 ------------- include/linux/clk-provider.h | 5 ----- 2 files changed, 18 deletions(-) (limited to 'drivers/clk/clk.c') diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index ef701ce44439..59207cd6138a 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -2669,19 +2669,6 @@ static void clk_debug_unregister(struct clk_core *core) mutex_unlock(&clk_debug_lock); } -struct dentry *clk_debugfs_add_file(struct clk_hw *hw, char *name, umode_t mode, - void *data, const struct file_operations *fops) -{ - struct dentry *d = NULL; - - if (hw->core->dentry) - d = debugfs_create_file(name, mode, hw->core->dentry, data, - fops); - - return d; -} -EXPORT_SYMBOL_GPL(clk_debugfs_add_file); - /** * clk_debug_init - lazily populate the debugfs clk directory * diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 210a890008f9..00e55d4d07f1 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -996,10 +996,5 @@ static inline void clk_writel(u32 val, u32 __iomem *reg) #endif /* platform dependent I/O accessors */ -#ifdef CONFIG_DEBUG_FS -struct dentry *clk_debugfs_add_file(struct clk_hw *hw, char *name, umode_t mode, - void *data, const struct file_operations *fops); -#endif - #endif /* CONFIG_COMMON_CLK */ #endif /* CLK_PROVIDER_H */ -- cgit v1.2.3