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Revert "net: mvpp2: debugfs: fix memory leak when using debugfs_lookup()"

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commit 6052a4c11fd893234e085edf7bf2e00a33a79d4e upstream.

This reverts commit fe2c9c61f668cde28dac2b188028c5299cedcc1e.

On Tue, Sep 13, 2022 at 05:48:58PM +0100, Russell King (Oracle) wrote:
>What happens if this is built as a module, and the module is loaded,
>binds (and creates the directory), then is removed, and then re-
>inserted?  Nothing removes the old directory, so doesn't
>debugfs_create_dir() fail, resulting in subsequent failure to add
>any subsequent debugfs entries?
>
>I don't think this patch should be backported to stable trees until
>this point is addressed.

Revert until a proper fix is available as the original behavior was
better.

Cc: Marcin Wojtas <mw@semihalf.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: stable@kernel.org
Reported-by: Russell King <linux@armlinux.org.uk>
Fixes: fe2c9c61f668 ("net: mvpp2: debugfs: fix memory leak when using debugfs_lookup()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220923234736.657413-1-sashal@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sasha Levin 2022-09-23 19:47:36 -04:00 committed by Greg Kroah-Hartman
parent 9a3740f448
commit 5cebfac6a8
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c
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@ -700,10 +700,10 @@ void mvpp2_dbgfs_cleanup(struct mvpp2 *priv)
void mvpp2_dbgfs_init(struct mvpp2 *priv, const char *name)
{
static struct dentry *mvpp2_root;
struct dentry *mvpp2_dir;
struct dentry *mvpp2_dir, *mvpp2_root;
int ret, i;
mvpp2_root = debugfs_lookup(MVPP2_DRIVER_NAME, NULL);
if (!mvpp2_root)
mvpp2_root = debugfs_create_dir(MVPP2_DRIVER_NAME, NULL);