[media] stv090x: do not unlock unheld mutex in stv090x_sleep()
goto err and goto err_gateoff before mutex_lock(&state->internal->demod_lock) lead to unlock of unheld mutex in stv090x_sleep(). Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Cc: Manu Abraham <abraham.manu@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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a9fc36afc0
Коммит
c67d2f0740
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@ -3906,12 +3906,12 @@ static int stv090x_sleep(struct dvb_frontend *fe)
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reg = stv090x_read_reg(state, STV090x_TSTTNR1);
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STV090x_SETFIELD(reg, ADC1_PON_FIELD, 0);
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if (stv090x_write_reg(state, STV090x_TSTTNR1, reg) < 0)
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goto err;
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goto err_unlock;
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/* power off DiSEqC 1 */
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reg = stv090x_read_reg(state, STV090x_TSTTNR2);
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STV090x_SETFIELD(reg, DISEQC1_PON_FIELD, 0);
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if (stv090x_write_reg(state, STV090x_TSTTNR2, reg) < 0)
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goto err;
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goto err_unlock;
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/* check whether path 2 is already sleeping, that is when
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ADC2 is off */
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@ -3930,7 +3930,7 @@ static int stv090x_sleep(struct dvb_frontend *fe)
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if (full_standby)
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STV090x_SETFIELD(reg, STOP_CLKFEC_FIELD, 1);
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if (stv090x_write_reg(state, STV090x_STOPCLK1, reg) < 0)
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goto err;
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goto err_unlock;
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reg = stv090x_read_reg(state, STV090x_STOPCLK2);
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/* sampling 1 clock */
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STV090x_SETFIELD(reg, STOP_CLKSAMP1_FIELD, 1);
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@ -3941,7 +3941,7 @@ static int stv090x_sleep(struct dvb_frontend *fe)
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if (full_standby)
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STV090x_SETFIELD(reg, STOP_CLKTS_FIELD, 1);
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if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
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goto err;
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goto err_unlock;
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break;
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case STV090x_DEMODULATOR_1:
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@ -3949,12 +3949,12 @@ static int stv090x_sleep(struct dvb_frontend *fe)
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reg = stv090x_read_reg(state, STV090x_TSTTNR3);
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STV090x_SETFIELD(reg, ADC2_PON_FIELD, 0);
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if (stv090x_write_reg(state, STV090x_TSTTNR3, reg) < 0)
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goto err;
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goto err_unlock;
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/* power off DiSEqC 2 */
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reg = stv090x_read_reg(state, STV090x_TSTTNR4);
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STV090x_SETFIELD(reg, DISEQC2_PON_FIELD, 0);
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if (stv090x_write_reg(state, STV090x_TSTTNR4, reg) < 0)
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goto err;
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goto err_unlock;
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/* check whether path 1 is already sleeping, that is when
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ADC1 is off */
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@ -3973,7 +3973,7 @@ static int stv090x_sleep(struct dvb_frontend *fe)
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if (full_standby)
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STV090x_SETFIELD(reg, STOP_CLKFEC_FIELD, 1);
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if (stv090x_write_reg(state, STV090x_STOPCLK1, reg) < 0)
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goto err;
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goto err_unlock;
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reg = stv090x_read_reg(state, STV090x_STOPCLK2);
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/* sampling 2 clock */
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STV090x_SETFIELD(reg, STOP_CLKSAMP2_FIELD, 1);
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@ -3984,7 +3984,7 @@ static int stv090x_sleep(struct dvb_frontend *fe)
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if (full_standby)
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STV090x_SETFIELD(reg, STOP_CLKTS_FIELD, 1);
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if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
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goto err;
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goto err_unlock;
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break;
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default:
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@ -3997,7 +3997,7 @@ static int stv090x_sleep(struct dvb_frontend *fe)
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reg = stv090x_read_reg(state, STV090x_SYNTCTRL);
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STV090x_SETFIELD(reg, STANDBY_FIELD, 0x01);
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if (stv090x_write_reg(state, STV090x_SYNTCTRL, reg) < 0)
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goto err;
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goto err_unlock;
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}
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mutex_unlock(&state->internal->demod_lock);
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@ -4005,8 +4005,10 @@ static int stv090x_sleep(struct dvb_frontend *fe)
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err_gateoff:
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stv090x_i2c_gate_ctrl(state, 0);
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err:
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goto err;
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err_unlock:
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mutex_unlock(&state->internal->demod_lock);
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err:
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dprintk(FE_ERROR, 1, "I/O error");
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return -1;
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}
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