On Tue 22 Dec 04:57 CST 2020, Arnaud Pouliquen wrote: > Only one endpoint can be created per device, prevent from multi open. > Having multiple invocations of rpmsg_create_ept() with the same chinfo sounds like a bad idea. I think in the SMD and GLINK case the underlying transport would complain that the related chinfo is already "busy", but this seems like an appropriate fix regardless. Please add a proper Fixes: tag and send this outside of this patch series. Thanks, Bjorn > 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 >
