b43: don't save dentries for debugfs

There is no need to keep around the dentry pointers for the debugfs
files as they will all be automatically removed when the subdir is
removed.  So save the space and logic involved in keeping them around by
just getting rid of them entirely.

By doing this change, we remove one of the last in-kernel user that was
storing the result of debugfs_create_bool(), so that api can be cleaned
up.

Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Chao Yu <chao@kernel.org>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: b43-dev@lists.infradead.org
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210518163304.3702015-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 5 insertions, 29 deletions

diff --git a/drivers/net/wireless/broadcom/b43/debugfs.c b/drivers/net/wireless/broadcom/b43/debugfs.c
index 89a25aefb327..efa98444e3fb 100644
--- a/drivers/net/wireless/broadcom/b43/debugfs.c
+++ b/drivers/net/wireless/broadcom/b43/debugfs.c
@@ -643,24 +643,14 @@ bool b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
 	return enabled;
 }
 
-static void b43_remove_dynamic_debug(struct b43_wldev *dev)
-{
-	struct b43_dfsentry *e = dev->dfsentry;
-	int i;
-
-	for (i = 0; i < __B43_NR_DYNDBG; i++)
-		debugfs_remove(e->dyn_debug_dentries[i]);
-}
-
 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e = dev->dfsentry;
 
 #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]));		\
+	debugfs_create_bool(name, 0600, e->subdir,		\
+			    &(e->dyn_debug[id]));		\
 	} while (0)
 
 	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, false);
@@ -713,10 +703,9 @@ void b43_debugfs_add_device(struct b43_wldev *dev)
 
 #define ADD_FILE(name, mode)	\
 	do {							\
-		e->file_##name.dentry =				\
-			debugfs_create_file(__stringify(name),	\
-					mode, e->subdir, dev,	\
-					&fops_##name.fops);	\
+		debugfs_create_file(__stringify(name),		\
+				mode, e->subdir, dev,		\
+				&fops_##name.fops);		\
 	} while (0)
 
 
@@ -746,19 +735,6 @@ void b43_debugfs_remove_device(struct b43_wldev *dev)
 	e = dev->dfsentry;
 	if (!e)
 		return;
-	b43_remove_dynamic_debug(dev);
-
-	debugfs_remove(e->file_shm16read.dentry);
-	debugfs_remove(e->file_shm16write.dentry);
-	debugfs_remove(e->file_shm32read.dentry);
-	debugfs_remove(e->file_shm32write.dentry);
-	debugfs_remove(e->file_mmio16read.dentry);
-	debugfs_remove(e->file_mmio16write.dentry);
-	debugfs_remove(e->file_mmio32read.dentry);
-	debugfs_remove(e->file_mmio32write.dentry);
-	debugfs_remove(e->file_txstat.dentry);
-	debugfs_remove(e->file_restart.dentry);
-	debugfs_remove(e->file_loctls.dentry);
 
 	debugfs_remove(e->subdir);
 	kfree(e->txstatlog.log);