diff options
| -rw-r--r-- | drivers/media/dvb-core/dvb_frontend.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c index d009478f16c4..4c35eb47472b 100644 --- a/drivers/media/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb-core/dvb_frontend.c @@ -2087,6 +2087,8 @@ static int dvb_frontend_ioctl_properties(struct file *file, dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__); } else if (cmd == FE_GET_PROPERTY) { + struct dtv_frontend_properties getp = fe->dtv_property_cache; + dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props); @@ -2108,17 +2110,18 @@ static int dvb_frontend_ioctl_properties(struct file *file, } /* - * Fills the cache out struct with the cache contents, plus - * the data retrieved from get_frontend, if the frontend - * is not idle. Otherwise, returns the cached content + * Let's use our own copy of property cache, in order to + * avoid mangling with DTV zigzag logic, as drivers might + * return crap, if they don't check if the data is available + * before updating the properties cache. */ if (fepriv->state != FESTATE_IDLE) { - err = dtv_get_frontend(fe, c, NULL); + err = dtv_get_frontend(fe, &getp, NULL); if (err < 0) goto out; } for (i = 0; i < tvps->num; i++) { - err = dtv_property_process_get(fe, c, tvp + i, file); + err = dtv_property_process_get(fe, &getp, tvp + i, file); if (err < 0) goto out; (tvp + i)->result = err; @@ -2523,10 +2526,18 @@ static int dvb_frontend_ioctl_legacy(struct file *file, err = dvb_frontend_get_event (fe, parg, file->f_flags); break; - case FE_GET_FRONTEND: - err = dtv_get_frontend(fe, c, parg); - break; + case FE_GET_FRONTEND: { + struct dtv_frontend_properties getp = fe->dtv_property_cache; + /* + * Let's use our own copy of property cache, in order to + * avoid mangling with DTV zigzag logic, as drivers might + * return crap, if they don't check if the data is available + * before updating the properties cache. + */ + err = dtv_get_frontend(fe, &getp, parg); + break; + } case FE_SET_FRONTEND_TUNE_MODE: fepriv->tune_mode_flags = (unsigned long) parg; err = 0; |