diff options
Diffstat (limited to 'components/drivers')
| -rw-r--r-- | components/drivers/src/portal.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/components/drivers/src/portal.c b/components/drivers/src/portal.c index 82d9d4e802..26977a8259 100644 --- a/components/drivers/src/portal.c +++ b/components/drivers/src/portal.c @@ -53,6 +53,9 @@ static rt_err_t _portal_open(rt_device_t dev, rt_uint16_t oflag) RT_ASSERT(dev); + if (!oflag) + return -RT_ERROR; + portal = (struct rt_portal_device*)dev; if (oflag & RT_DEVICE_OFLAG_RDONLY) |