diff mbox series

b43: no need to check return value of debugfs_create functions

Message ID 20190122152151.16139-30-gregkh@linuxfoundation.org (mailing list archive)
State Accepted
Commit e9bdcdc7cdf02819ea3f4205c7286ab97a9e1a1b
Delegated to: Kalle Valo
Headers show
Series b43: no need to check return value of debugfs_create functions | expand

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: Kalle Valo <kvalo@codeaurora.org>
Cc: linux-wireless@vger.kernel.org
Cc: b43-dev@lists.infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/wireless/broadcom/b43/debugfs.c | 36 +++++----------------
 1 file changed, 8 insertions(+), 28 deletions(-)

Comments

Larry Finger Jan. 22, 2019, 3:46 p.m. UTC | #1 
On 1/22/19 9:21 AM, 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: Kalle Valo <kvalo@codeaurora.org>
> Cc: linux-wireless@vger.kernel.org
> Cc: b43-dev@lists.infradead.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Acked-by: Larry Finger <Larry.Finger@lwfinger.net>

Thanks,

Larry
Kalle Valo Feb. 1, 2019, 12:35 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: Kalle Valo <kvalo@codeaurora.org>
> Cc: linux-wireless@vger.kernel.org
> Cc: b43-dev@lists.infradead.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Acked-by: Larry Finger <Larry.Finger@lwfinger.net>

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

e9bdcdc7cdf0 b43: no need to check return value of debugfs_create functions
diff mbox series

Patch

diff --git a/drivers/net/wireless/broadcom/b43/debugfs.c b/drivers/net/wireless/broadcom/b43/debugfs.c
index 77046384dd80..976c8ec4e992 100644
--- a/drivers/net/wireless/broadcom/b43/debugfs.c
+++ b/drivers/net/wireless/broadcom/b43/debugfs.c
@@ -668,15 +668,13 @@  static void b43_remove_dynamic_debug(struct b43_wldev *dev)
 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e = dev->dfsentry;
-	struct dentry *d;
 
-#define add_dyn_dbg(name, id, initstate) do {		\
-	e->dyn_debug[id] = (initstate);			\
-	d = debugfs_create_bool(name, 0600, e->subdir,	\
-				&(e->dyn_debug[id]));	\
-	if (!IS_ERR(d))					\
-		e->dyn_debug_dentries[id] = d;		\
-				} while (0)
+#define add_dyn_dbg(name, id, initstate) do {			\
+	e->dyn_debug[id] = (initstate);				\
+	e->dyn_debug_dentries[id] =				\
+		debugfs_create_bool(name, 0600, e->subdir,	\
+				&(e->dyn_debug[id]));		\
+	} while (0)
 
 	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, false);
 	add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, false);
@@ -718,19 +716,6 @@  void b43_debugfs_add_device(struct b43_wldev *dev)
 
 	snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 	e->subdir = debugfs_create_dir(devdir, rootdir);
-	if (!e->subdir || IS_ERR(e->subdir)) {
-		if (e->subdir == ERR_PTR(-ENODEV)) {
-			b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
-			       "enabled in kernel config\n");
-		} else {
-			b43err(dev->wl, "debugfs: cannot create %s directory\n",
-			       devdir);
-		}
-		dev->dfsentry = NULL;
-		kfree(log->log);
-		kfree(e);
-		return;
-	}
 
 	e->mmio16read_next = 0xFFFF; /* invalid address */
 	e->mmio32read_next = 0xFFFF; /* invalid address */
@@ -741,13 +726,10 @@  void b43_debugfs_add_device(struct b43_wldev *dev)
 
 #define ADD_FILE(name, mode)	\
 	do {							\
-		struct dentry *d;				\
-		d = debugfs_create_file(__stringify(name),	\
+		e->file_##name.dentry =				\
+			debugfs_create_file(__stringify(name),	\
 					mode, e->subdir, dev,	\
 					&fops_##name.fops);	\
-		e->file_##name.dentry = NULL;			\
-		if (!IS_ERR(d))					\
-			e->file_##name.dentry = d;		\
 	} while (0)
 
 
@@ -818,8 +800,6 @@  void b43_debugfs_log_txstat(struct b43_wldev *dev,
 void b43_debugfs_init(void)
 {
 	rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
-	if (IS_ERR(rootdir))
-		rootdir = NULL;
 }
 
 void b43_debugfs_exit(void)