diff options
Diffstat (limited to 'drivers/media/dvb-core/dvb_frontend.c')
| -rw-r--r-- | drivers/media/dvb-core/dvb_frontend.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c index d0955e0c86f7..2a98082c605e 100644 --- a/drivers/media/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb-core/dvb_frontend.c @@ -2765,7 +2765,17 @@ static int dvb_frontend_open(struct inode *inode, struct file *file) if (fe->exit == DVB_FE_DEVICE_REMOVED) return -ENODEV; - if (adapter->mfe_shared) { + if (adapter->mfe_shared == 2) { + mutex_lock(&adapter->mfe_lock); + if ((file->f_flags & O_ACCMODE) != O_RDONLY) { + if (adapter->mfe_dvbdev && + !adapter->mfe_dvbdev->writers) { + mutex_unlock(&adapter->mfe_lock); + return -EBUSY; + } + adapter->mfe_dvbdev = dvbdev; + } + } else if (adapter->mfe_shared) { mutex_lock(&adapter->mfe_lock); if (!adapter->mfe_dvbdev) |