[media] tda1004x: only update the frontend properties if locked
The tda1004x was updating the properties cache before locking. If the device is not locked, the data at the registers are just random values with no real meaning. This caused the driver to fail with libdvbv5, as such library calls GET_PROPERTY from time to time, in order to return the DVB stats. Tested with a saa7134 card 78: ASUSTeK P7131 Dual, vendor PCI ID: 1043:4862 Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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@ -903,9 +903,18 @@ static int tda1004x_get_fe(struct dvb_frontend *fe)
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{
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struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
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struct tda1004x_state* state = fe->demodulator_priv;
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int status;
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dprintk("%s\n", __func__);
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status = tda1004x_read_byte(state, TDA1004X_STATUS_CD);
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if (status == -1)
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return -EIO;
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/* Only update the properties cache if device is locked */
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if (!(status & 8))
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return 0;
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// inversion status
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fe_params->inversion = INVERSION_OFF;
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if (tda1004x_read_byte(state, TDA1004X_CONFC1) & 0x20)
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