[PATCH v4 37/54] functionfs: don't bother with ffs->ref in ffs_data_{opened,closed}()

Al Viro
2025-11-18T05:16:10Z

A reference is held by the superblock (it's dropped in ffs_kill_sb())
and filesystem will not get to ->kill_sb() while there are any opened
files, TYVM...

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
drivers/usb/gadget/function/f_fs.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 43926aca8a40..0bcff49e1f11 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -2128,7 +2128,6 @@ static void ffs_data_get(struct ffs_data *ffs)

static void ffs_data_opened(struct ffs_data *ffs)
{
- refcount_inc(&ffs->ref);
if (atomic_add_return(1, &ffs->opened) == 1 &&
ffs->state == FFS_DEACTIVATED) {
ffs->state = FFS_CLOSING;
@@ -2153,11 +2152,11 @@ static void ffs_data_put(struct ffs_data *ffs)

static void ffs_data_closed(struct ffs_data *ffs)
{
- struct ffs_epfile *epfiles;
- unsigned long flags;
-
if (atomic_dec_and_test(&ffs->opened)) {
if (ffs->no_disconnect) {
+ struct ffs_epfile *epfiles;
+ unsigned long flags;
+
ffs->state = FFS_DEACTIVATED;
spin_lock_irqsave(&ffs->eps_lock, flags);
epfiles = ffs->epfiles;
@@ -2176,7 +2175,6 @@ static void ffs_data_closed(struct ffs_data *ffs)
ffs_data_reset(ffs);
}
}
- ffs_data_put(ffs);
}

static struct ffs_data *ffs_data_new(const char *dev_name)
--
2.47.3