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[media] dvb_frontend: do not allow statistic IOCTLs when sleeping 

Demodulator cannot perform statistic IOCTLs when it is not tuned.
Return -EAGAIN in such case.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antti Palosaari 2012-08-09 19:00:51 -03:00 committed by Mauro Carvalho Chehab
parent 3c16b2b330
commit 48caa6f129
1 changed files with 25 additions and 9 deletions
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34
drivers/media/dvb-core/dvb_frontend.c
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@ -2131,27 +2131,43 @@ 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 = -EAGAIN;
}
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 = -EAGAIN;
}
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 = -EAGAIN;
}
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 = -EAGAIN;
}
break;
case FE_DISEQC_RESET_OVERLOAD:
if (fe->ops.diseqc_reset_overload) {
err = fe->ops.diseqc_reset_overload(fe);