diff options
| author | Abdun Nihaal <nihaal@cse.iitm.ac.in> | 2026-01-12 12:44:41 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-17 16:35:31 +0100 |
| commit | 7ea26e6dcabc270433b6ded2a1aee85b215d1b28 (patch) | |
| tree | f95a48d61d74010c3f376f3cfbab9147ee175117 | |
| parent | 7882637ea5ccba08ec3674628f03ff0baf48d935 (diff) | |
gpio: mpsse: fix reference leak in gpio_mpsse_probe() error paths
[ Upstream commit 1e876e5a0875e71e34148c9feb2eedd3bf6b2b43 ]
The reference obtained by calling usb_get_dev() is not released in the
gpio_mpsse_probe() error paths. Fix that by using device managed helper
functions. Also remove the usb_put_dev() call in the disconnect function
since now it will be released automatically.
Cc: stable@vger.kernel.org
Fixes: c46a74ff05c0 ("gpio: add support for FTDI's MPSSE as GPIO")
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Link: https://lore.kernel.org/r/20251226060414.20785-1-nihaal@cse.iitm.ac.in
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpio/gpio-mpsse.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-mpsse.c b/drivers/gpio/gpio-mpsse.c index e68179caafa6..120b27183b1d 100644 --- a/drivers/gpio/gpio-mpsse.c +++ b/drivers/gpio/gpio-mpsse.c @@ -538,6 +538,13 @@ static void gpio_mpsse_ida_remove(void *data) ida_free(&gpio_mpsse_ida, priv->id); } +static void gpio_mpsse_usb_put_dev(void *data) +{ + struct mpsse_priv *priv = data; + + usb_put_dev(priv->udev); +} + static int mpsse_init_valid_mask(struct gpio_chip *chip, unsigned long *valid_mask, unsigned int ngpios) @@ -582,6 +589,10 @@ static int gpio_mpsse_probe(struct usb_interface *interface, INIT_LIST_HEAD(&priv->workers); priv->udev = usb_get_dev(interface_to_usbdev(interface)); + err = devm_add_action_or_reset(dev, gpio_mpsse_usb_put_dev, priv); + if (err) + return err; + priv->intf = interface; priv->intf_id = interface->cur_altsetting->desc.bInterfaceNumber; @@ -703,7 +714,6 @@ static void gpio_mpsse_disconnect(struct usb_interface *intf) priv->intf = NULL; usb_set_intfdata(intf, NULL); - usb_put_dev(priv->udev); } static struct usb_driver gpio_mpsse_driver = { |