From 1dc244064c47d6df7925ca0895f8365e68d3abd1 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 3 Jul 2019 13:39:56 +0200 Subject: [PATCH] rt2x00: 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. Because we don't need to save the individual debugfs files and directories, remove the local storage of them and just remove the entire debugfs directory in a single call, making things a lot simpler. Cc: Stanislaw Gruszka Cc: Helmut Schaa Cc: Kalle Valo Cc: "David S. Miller" Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman Acked-by: Stanislaw Gruszka Signed-off-by: Kalle Valo --- drivers/net/wireless/ralink/rt2x00/rt2x00debug.c | 136 ++++++----------------- 1 file changed, 35 insertions(+), 101 deletions(-) diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c b/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c index ef5f515..4d4e388 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c @@ -65,26 +65,6 @@ struct rt2x00debug_intf { * - crypto stats file */ struct dentry *driver_folder; - struct dentry *driver_entry; - struct dentry *chipset_entry; - struct dentry *dev_flags; - struct dentry *cap_flags; - struct dentry *restart_hw; - struct dentry *register_folder; - struct dentry *csr_off_entry; - struct dentry *csr_val_entry; - struct dentry *eeprom_off_entry; - struct dentry *eeprom_val_entry; - struct dentry *bbp_off_entry; - struct dentry *bbp_val_entry; - struct dentry *rf_off_entry; - struct dentry *rf_val_entry; - struct dentry *rfcsr_off_entry; - struct dentry *rfcsr_val_entry; - struct dentry *queue_folder; - struct dentry *queue_frame_dump_entry; - struct dentry *queue_stats_entry; - struct dentry *crypto_stats_entry; /* * The frame dump file only allows a single reader, @@ -596,39 +576,34 @@ static const struct file_operations rt2x00debug_restart_hw = { .llseek = generic_file_llseek, }; -static struct dentry *rt2x00debug_create_file_driver(const char *name, - struct rt2x00debug_intf - *intf, - struct debugfs_blob_wrapper - *blob) +static void rt2x00debug_create_file_driver(const char *name, + struct rt2x00debug_intf *intf, + struct debugfs_blob_wrapper *blob) { char *data; data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL); if (!data) - return NULL; + return; blob->data = data; data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name); data += sprintf(data, "version:\t%s\n", DRV_VERSION); blob->size = strlen(blob->data); - return debugfs_create_blob(name, 0400, intf->driver_folder, blob); + debugfs_create_blob(name, 0400, intf->driver_folder, blob); } -static struct dentry *rt2x00debug_create_file_chipset(const char *name, - struct rt2x00debug_intf - *intf, - struct - debugfs_blob_wrapper - *blob) +static void rt2x00debug_create_file_chipset(const char *name, + struct rt2x00debug_intf *intf, + struct debugfs_blob_wrapper *blob) { const struct rt2x00debug *debug = intf->debug; char *data; data = kzalloc(9 * MAX_LINE_LENGTH, GFP_KERNEL); if (!data) - return NULL; + return; blob->data = data; data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt); @@ -654,13 +629,15 @@ static struct dentry *rt2x00debug_create_file_chipset(const char *name, blob->size = strlen(blob->data); - return debugfs_create_blob(name, 0400, intf->driver_folder, blob); + debugfs_create_blob(name, 0400, intf->driver_folder, blob); } void rt2x00debug_register(struct rt2x00_dev *rt2x00dev) { const struct rt2x00debug *debug = rt2x00dev->ops->debugfs; struct rt2x00debug_intf *intf; + struct dentry *queue_folder; + struct dentry *register_folder; intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL); if (!intf) { @@ -676,43 +653,27 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev) debugfs_create_dir(intf->rt2x00dev->ops->name, rt2x00dev->hw->wiphy->debugfsdir); - intf->driver_entry = - rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob); + rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob); + rt2x00debug_create_file_chipset("chipset", intf, &intf->chipset_blob); + debugfs_create_file("dev_flags", 0400, intf->driver_folder, intf, + &rt2x00debug_fop_dev_flags); + debugfs_create_file("cap_flags", 0400, intf->driver_folder, intf, + &rt2x00debug_fop_cap_flags); + debugfs_create_file("restart_hw", 0200, intf->driver_folder, intf, + &rt2x00debug_restart_hw); - intf->chipset_entry = - rt2x00debug_create_file_chipset("chipset", - intf, &intf->chipset_blob); - - intf->dev_flags = debugfs_create_file("dev_flags", 0400, - intf->driver_folder, intf, - &rt2x00debug_fop_dev_flags); - - intf->cap_flags = debugfs_create_file("cap_flags", 0400, - intf->driver_folder, intf, - &rt2x00debug_fop_cap_flags); - - intf->restart_hw = debugfs_create_file("restart_hw", 0200, - intf->driver_folder, intf, - &rt2x00debug_restart_hw); - - intf->register_folder = - debugfs_create_dir("register", intf->driver_folder); + register_folder = debugfs_create_dir("register", intf->driver_folder); #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \ ({ \ if (debug->__name.read) { \ - (__intf)->__name##_off_entry = \ - debugfs_create_u32(__stringify(__name) "_offset", \ - 0600, \ - (__intf)->register_folder, \ - &(__intf)->offset_##__name); \ + debugfs_create_u32(__stringify(__name) "_offset", 0600, \ + register_folder, \ + &(__intf)->offset_##__name); \ \ - (__intf)->__name##_val_entry = \ - debugfs_create_file(__stringify(__name) "_value", \ - 0600, \ - (__intf)->register_folder, \ - (__intf), \ - &rt2x00debug_fop_##__name); \ + debugfs_create_file(__stringify(__name) "_value", 0600, \ + register_folder, (__intf), \ + &rt2x00debug_fop_##__name); \ } \ }) @@ -724,26 +685,21 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev) #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY - intf->queue_folder = - debugfs_create_dir("queue", intf->driver_folder); + queue_folder = debugfs_create_dir("queue", intf->driver_folder); - intf->queue_frame_dump_entry = - debugfs_create_file("dump", 0400, intf->queue_folder, - intf, &rt2x00debug_fop_queue_dump); + debugfs_create_file("dump", 0400, queue_folder, intf, + &rt2x00debug_fop_queue_dump); skb_queue_head_init(&intf->frame_dump_skbqueue); init_waitqueue_head(&intf->frame_dump_waitqueue); - intf->queue_stats_entry = - debugfs_create_file("queue", 0400, intf->queue_folder, - intf, &rt2x00debug_fop_queue_stats); + debugfs_create_file("queue", 0400, queue_folder, intf, + &rt2x00debug_fop_queue_stats); #ifdef CONFIG_RT2X00_LIB_CRYPTO if (rt2x00_has_cap_hw_crypto(rt2x00dev)) - intf->crypto_stats_entry = - debugfs_create_file("crypto", 0444, intf->queue_folder, - intf, - &rt2x00debug_fop_crypto_stats); + debugfs_create_file("crypto", 0444, queue_folder, intf, + &rt2x00debug_fop_crypto_stats); #endif return; @@ -758,29 +714,7 @@ void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev) skb_queue_purge(&intf->frame_dump_skbqueue); -#ifdef CONFIG_RT2X00_LIB_CRYPTO - debugfs_remove(intf->crypto_stats_entry); -#endif - debugfs_remove(intf->queue_stats_entry); - debugfs_remove(intf->queue_frame_dump_entry); - debugfs_remove(intf->queue_folder); - debugfs_remove(intf->rfcsr_val_entry); - debugfs_remove(intf->rfcsr_off_entry); - debugfs_remove(intf->rf_val_entry); - debugfs_remove(intf->rf_off_entry); - debugfs_remove(intf->bbp_val_entry); - debugfs_remove(intf->bbp_off_entry); - debugfs_remove(intf->eeprom_val_entry); - debugfs_remove(intf->eeprom_off_entry); - debugfs_remove(intf->csr_val_entry); - debugfs_remove(intf->csr_off_entry); - debugfs_remove(intf->register_folder); - debugfs_remove(intf->dev_flags); - debugfs_remove(intf->restart_hw); - debugfs_remove(intf->cap_flags); - debugfs_remove(intf->chipset_entry); - debugfs_remove(intf->driver_entry); - debugfs_remove(intf->driver_folder); + debugfs_remove_recursive(intf->driver_folder); kfree(intf->chipset_blob.data); kfree(intf->driver_blob.data); kfree(intf); -- 2.7.4