From: Cai Xinchen caixinchen1@huawei.com
[ 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@huawei.com Fixes: e8de370188d0 ("rapidio: add mport char device driver") Signed-off-by: Cai Xinchen caixinchen1@huawei.com Cc: Alexandre Bounine alex.bou9@gmail.com Cc: Dan Carpenter error27@gmail.com Cc: Jakob Koschel jakobkoschel@gmail.com Cc: John Hubbard jhubbard@nvidia.com Cc: Matt Porter mporter@kernel.crashing.org Cc: Wang Weiyang wangweiyang2@huawei.com Cc: Yang Yingliang yangyingliang@huawei.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 b8c09eaa23b5..5ac2dc1e2abd 100644 --- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -1911,6 +1911,7 @@ 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;