Using the RPMSG_DESTROY_EPT_IOCTL control, user application can destroy an endpoint. This patch prevents to destroy a default endpoint associated to a channel.
This update is needed to manage the "rpmsg-raw" channel. In this case a default endpoint is used and destroying it without the channel does not make sense. Signed-off-by: Arnaud Pouliquen <[email protected]> --- drivers/rpmsg/rpmsg_char.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index 8064244f8f18..08670e94714a 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -282,6 +282,10 @@ static long rpmsg_eptdev_ioctl(struct file *fp, unsigned int cmd, if (cmd != RPMSG_DESTROY_EPT_IOCTL) return -EINVAL; + /* Don't allow to destroy a default endpoint. */ + if (!eptdev->rpdev || eptdev->ept == eptdev->rpdev->ept) + return -EPERM; + return rpmsg_chrdev_destroy_eptdev(&eptdev->dev, NULL); } -- 2.17.1
