iwlegacy: no need to check return value of debugfs_create functions
diff mbox series

Message ID 20190122152151.16139-19-gregkh@linuxfoundation.org
State Accepted
Commit 71ee1284d6267904dc2ef0172a30a93d4a2e8234
Delegated to: Kalle Valo
Headers show
Series
  • iwlegacy: no need to check return value of debugfs_create functions
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Commit Message

Greg Kroah-Hartman Jan. 22, 2019, 3:21 p.m. UTC
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.

Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: linux-wireless@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 .../net/wireless/intel/iwlegacy/3945-mac.c    |  5 +--
 .../net/wireless/intel/iwlegacy/4965-mac.c    |  5 +--
 drivers/net/wireless/intel/iwlegacy/common.h  |  6 ++--
 drivers/net/wireless/intel/iwlegacy/debug.c   | 34 +++----------------
 4 files changed, 8 insertions(+), 42 deletions(-)

Comments

Stanislaw Gruszka Jan. 23, 2019, 8:47 a.m. UTC | #1
On Tue, Jan 22, 2019 at 04:21:18PM +0100, Greg Kroah-Hartman wrote:
> 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.
> 
> Cc: Stanislaw Gruszka <sgruszka@redhat.com>
> Cc: Kalle Valo <kvalo@codeaurora.org>
> Cc: linux-wireless@vger.kernel.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>
Kalle Valo Feb. 1, 2019, 12:29 p.m. UTC | #2
Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:

> 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.
> 
> Cc: Stanislaw Gruszka <sgruszka@redhat.com>
> Cc: Kalle Valo <kvalo@codeaurora.org>
> Cc: linux-wireless@vger.kernel.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>

Patch applied to wireless-drivers-next.git, thanks.

71ee1284d626 iwlegacy: no need to check return value of debugfs_create functions

Patch
diff mbox series

diff --git a/drivers/net/wireless/intel/iwlegacy/3945-mac.c b/drivers/net/wireless/intel/iwlegacy/3945-mac.c
index 57e3b6cca234..271977f7fbb0 100644
--- a/drivers/net/wireless/intel/iwlegacy/3945-mac.c
+++ b/drivers/net/wireless/intel/iwlegacy/3945-mac.c
@@ -3756,10 +3756,7 @@  il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err)
 		goto out_remove_sysfs;
 
-	err = il_dbgfs_register(il, DRV_NAME);
-	if (err)
-		IL_ERR("failed to create debugfs files. Ignoring error: %d\n",
-		       err);
+	il_dbgfs_register(il, DRV_NAME);
 
 	/* Start monitoring the killswitch */
 	queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ);
diff --git a/drivers/net/wireless/intel/iwlegacy/4965-mac.c b/drivers/net/wireless/intel/iwlegacy/4965-mac.c
index 6b4488a178a7..94222ae464ae 100644
--- a/drivers/net/wireless/intel/iwlegacy/4965-mac.c
+++ b/drivers/net/wireless/intel/iwlegacy/4965-mac.c
@@ -4988,10 +4988,7 @@  il4965_ucode_callback(const struct firmware *ucode_raw, void *context)
 	if (err)
 		goto out_unbind;
 
-	err = il_dbgfs_register(il, DRV_NAME);
-	if (err)
-		IL_ERR("failed to create debugfs files. Ignoring error: %d\n",
-		       err);
+	il_dbgfs_register(il, DRV_NAME);
 
 	err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group);
 	if (err) {
diff --git a/drivers/net/wireless/intel/iwlegacy/common.h b/drivers/net/wireless/intel/iwlegacy/common.h
index dc6a74a05983..b079c64ca014 100644
--- a/drivers/net/wireless/intel/iwlegacy/common.h
+++ b/drivers/net/wireless/intel/iwlegacy/common.h
@@ -2974,13 +2974,11 @@  il_print_hex_dump(struct il_priv *il, int level, const void *p, u32 len)
 #endif /* CONFIG_IWLEGACY_DEBUG */
 
 #ifdef CONFIG_IWLEGACY_DEBUGFS
-int il_dbgfs_register(struct il_priv *il, const char *name);
+void il_dbgfs_register(struct il_priv *il, const char *name);
 void il_dbgfs_unregister(struct il_priv *il);
 #else
-static inline int
-il_dbgfs_register(struct il_priv *il, const char *name)
+static inline void il_dbgfs_register(struct il_priv *il, const char *name)
 {
-	return 0;
 }
 
 static inline void
diff --git a/drivers/net/wireless/intel/iwlegacy/debug.c b/drivers/net/wireless/intel/iwlegacy/debug.c
index d76073def677..fa211412e0ac 100644
--- a/drivers/net/wireless/intel/iwlegacy/debug.c
+++ b/drivers/net/wireless/intel/iwlegacy/debug.c
@@ -128,23 +128,12 @@  EXPORT_SYMBOL(il_update_stats);
 
 /* create and remove of files */
 #define DEBUGFS_ADD_FILE(name, parent, mode) do {			\
-	if (!debugfs_create_file(#name, mode, parent, il,		\
-			 &il_dbgfs_##name##_ops))		\
-		goto err;						\
+	debugfs_create_file(#name, mode, parent, il,			\
+			    &il_dbgfs_##name##_ops);			\
 } while (0)
 
 #define DEBUGFS_ADD_BOOL(name, parent, ptr) do {			\
-	struct dentry *__tmp;						\
-	__tmp = debugfs_create_bool(#name, 0600, parent, ptr);		\
-	if (IS_ERR(__tmp) || !__tmp)					\
-		goto err;						\
-} while (0)
-
-#define DEBUGFS_ADD_X32(name, parent, ptr) do {				\
-	struct dentry *__tmp;						\
-	__tmp = debugfs_create_x32(#name, 0600, parent, ptr);		\
-	if (IS_ERR(__tmp) || !__tmp)					\
-		goto err;						\
+	debugfs_create_bool(#name, 0600, parent, ptr);			\
 } while (0)
 
 /* file operation */
@@ -1341,27 +1330,18 @@  DEBUGFS_WRITE_FILE_OPS(wd_timeout);
  * Create the debugfs files and directories
  *
  */
-int
+void
 il_dbgfs_register(struct il_priv *il, const char *name)
 {
 	struct dentry *phyd = il->hw->wiphy->debugfsdir;
 	struct dentry *dir_drv, *dir_data, *dir_rf, *dir_debug;
 
 	dir_drv = debugfs_create_dir(name, phyd);
-	if (!dir_drv)
-		return -ENOMEM;
-
 	il->debugfs_dir = dir_drv;
 
 	dir_data = debugfs_create_dir("data", dir_drv);
-	if (!dir_data)
-		goto err;
 	dir_rf = debugfs_create_dir("rf", dir_drv);
-	if (!dir_rf)
-		goto err;
 	dir_debug = debugfs_create_dir("debug", dir_drv);
-	if (!dir_debug)
-		goto err;
 
 	DEBUGFS_ADD_FILE(nvm, dir_data, 0400);
 	DEBUGFS_ADD_FILE(sram, dir_data, 0600);
@@ -1399,12 +1379,6 @@  il_dbgfs_register(struct il_priv *il, const char *name)
 		DEBUGFS_ADD_BOOL(disable_chain_noise, dir_rf,
 				 &il->disable_chain_noise_cal);
 	DEBUGFS_ADD_BOOL(disable_tx_power, dir_rf, &il->disable_tx_power_cal);
-	return 0;
-
-err:
-	IL_ERR("Can't create the debugfs directory\n");
-	il_dbgfs_unregister(il);
-	return -ENOMEM;
 }
 EXPORT_SYMBOL(il_dbgfs_register);