From: Cai Xinchen <caixinchen1@xxxxxxxxxx> [ Upstream commit d5b6e6eba3af11cb2a2791fa36a2524990fcde1a ] When kfifo_alloc fails, the refcount of chdev->dev is left incremental. We should use put_device(&chdev->dev) to decrease the ref count of chdev->dev to avoid refcount leak. Link: https://lkml.kernel.org/r/20221203085721.13146-1-caixinchen1@xxxxxxxxxx Fixes: e8de370188d0 ("rapidio: add mport char device driver") Signed-off-by: Cai Xinchen <caixinchen1@xxxxxxxxxx> Cc: Alexandre Bounine <alex.bou9@xxxxxxxxx> Cc: Dan Carpenter <error27@xxxxxxxxx> Cc: Jakob Koschel <jakobkoschel@xxxxxxxxx> Cc: John Hubbard <jhubbard@xxxxxxxxxx> Cc: Matt Porter <mporter@xxxxxxxxxxxxxxxxxxx> Cc: Wang Weiyang <wangweiyang2@xxxxxxxxxx> Cc: Yang Yingliang <yangyingliang@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/rapidio/devices/rio_mport_cdev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c index 381354ef0959..2c232217fd35 100644 --- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -1972,6 +1972,7 @@ static int mport_cdev_open(struct inode *inode, struct file *filp) sizeof(struct rio_event) * MPORT_EVENT_DEPTH, GFP_KERNEL); if (ret < 0) { + put_device(&chdev->dev); dev_err(&chdev->dev, DRV_NAME ": kfifo_alloc failed\n"); ret = -ENOMEM; goto err_fifo; -- 2.35.1
