Only one endpoint can be created per device, prevent from multi open. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxxxxxxx> --- drivers/rpmsg/rpmsg_char.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index 66e01b979e72..4b0674a2e3e9 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -122,6 +122,9 @@ static int rpmsg_eptdev_open(struct inode *inode, struct file *filp) struct rpmsg_device *rpdev = eptdev->rpdev; struct device *dev = &eptdev->dev; + if (eptdev->ept) + return -EBUSY; + get_device(dev); ept = rpmsg_create_ept(rpdev, rpmsg_ept_cb, eptdev, eptdev->chinfo); -- 2.17.1
