Demodulator cannot perform statistic IOCTLs when it is not tuned.
Return -EPERM in such case.
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/media/dvb/dvb-core/dvb_frontend.c | 34 +++++++++++++++++++++++--------
1 file changed, 25 insertions(+), 9 deletions(-)
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c
b/drivers/media/dvb/dvb-core/dvb_frontend.c
index 4fc11eb..40efcde 100644
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -2157,27 +2157,43 @@ static int dvb_frontend_ioctl_legacy(struct file *file,
err = fe->ops.read_status(fe, status);
break;
}
+
case FE_READ_BER:
- if (fe->ops.read_ber)
- err = fe->ops.read_ber(fe, (__u32*) parg);
+ if (fe->ops.read_ber) {
+ if (fepriv->thread)
+ err = fe->ops.read_ber(fe, (__u32 *) parg);
+ else
+ err = -EPERM;
+ }
break;
case FE_READ_SIGNAL_STRENGTH:
- if (fe->ops.read_signal_strength)
- err = fe->ops.read_signal_strength(fe, (__u16*) parg);
+ if (fe->ops.read_signal_strength) {
+ if (fepriv->thread)
+ err = fe->ops.read_signal_strength(fe, (__u16
*) parg);
+ else
+ err = -EPERM;
+ }
break;
case FE_READ_SNR:
- if (fe->ops.read_snr)
- err = fe->ops.read_snr(fe, (__u16*) parg);
+ if (fe->ops.read_snr) {
+ if (fepriv->thread)
+ err = fe->ops.read_snr(fe, (__u16 *) parg);
+ else
+ err = -EPERM;
+ }
break;
case FE_READ_UNCORRECTED_BLOCKS:
- if (fe->ops.read_ucblocks)
- err = fe->ops.read_ucblocks(fe, (__u32*) parg);
+ if (fe->ops.read_ucblocks) {
+ if (fepriv->thread)
+ err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
+ else
+ err = -EPERM;
+ }
break;
-
case FE_DISEQC_RESET_OVERLOAD:
if (fe->ops.diseqc_reset_overload) {
err = fe->ops.diseqc_reset_overload(fe);
--
1.7.11.2
--
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