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@xxxxxxxxx> --- drivers/media/dvb-frontends/stv090x.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/drivers/media/dvb-frontends/stv090x.c b/drivers/media/dvb-frontends/stv090x.c index 13caec0..4f600ac 100644 --- a/drivers/media/dvb-frontends/stv090x.c +++ b/drivers/media/dvb-frontends/stv090x.c @@ -3906,12 +3906,12 @@ static int stv090x_sleep(struct dvb_frontend *fe) reg = stv090x_read_reg(state, STV090x_TSTTNR1); STV090x_SETFIELD(reg, ADC1_PON_FIELD, 0); if (stv090x_write_reg(state, STV090x_TSTTNR1, reg) < 0) - goto err; + goto err_unlock; /* power off DiSEqC 1 */ reg = stv090x_read_reg(state, STV090x_TSTTNR2); STV090x_SETFIELD(reg, DISEQC1_PON_FIELD, 0); if (stv090x_write_reg(state, STV090x_TSTTNR2, reg) < 0) - goto err; + goto err_unlock; /* check whether path 2 is already sleeping, that is when ADC2 is off */ @@ -3930,7 +3930,7 @@ static int stv090x_sleep(struct dvb_frontend *fe) if (full_standby) STV090x_SETFIELD(reg, STOP_CLKFEC_FIELD, 1); if (stv090x_write_reg(state, STV090x_STOPCLK1, reg) < 0) - goto err; + goto err_unlock; reg = stv090x_read_reg(state, STV090x_STOPCLK2); /* sampling 1 clock */ STV090x_SETFIELD(reg, STOP_CLKSAMP1_FIELD, 1); @@ -3941,7 +3941,7 @@ static int stv090x_sleep(struct dvb_frontend *fe) if (full_standby) STV090x_SETFIELD(reg, STOP_CLKTS_FIELD, 1); if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0) - goto err; + goto err_unlock; break; case STV090x_DEMODULATOR_1: @@ -3949,12 +3949,12 @@ static int stv090x_sleep(struct dvb_frontend *fe) reg = stv090x_read_reg(state, STV090x_TSTTNR3); STV090x_SETFIELD(reg, ADC2_PON_FIELD, 0); if (stv090x_write_reg(state, STV090x_TSTTNR3, reg) < 0) - goto err; + goto err_unlock; /* power off DiSEqC 2 */ reg = stv090x_read_reg(state, STV090x_TSTTNR4); STV090x_SETFIELD(reg, DISEQC2_PON_FIELD, 0); if (stv090x_write_reg(state, STV090x_TSTTNR4, reg) < 0) - goto err; + goto err_unlock; /* check whether path 1 is already sleeping, that is when ADC1 is off */ @@ -3973,7 +3973,7 @@ static int stv090x_sleep(struct dvb_frontend *fe) if (full_standby) STV090x_SETFIELD(reg, STOP_CLKFEC_FIELD, 1); if (stv090x_write_reg(state, STV090x_STOPCLK1, reg) < 0) - goto err; + goto err_unlock; reg = stv090x_read_reg(state, STV090x_STOPCLK2); /* sampling 2 clock */ STV090x_SETFIELD(reg, STOP_CLKSAMP2_FIELD, 1); @@ -3984,7 +3984,7 @@ static int stv090x_sleep(struct dvb_frontend *fe) if (full_standby) STV090x_SETFIELD(reg, STOP_CLKTS_FIELD, 1); if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0) - goto err; + goto err_unlock; break; default: @@ -3997,7 +3997,7 @@ static int stv090x_sleep(struct dvb_frontend *fe) reg = stv090x_read_reg(state, STV090x_SYNTCTRL); STV090x_SETFIELD(reg, STANDBY_FIELD, 0x01); if (stv090x_write_reg(state, STV090x_SYNTCTRL, reg) < 0) - goto err; + goto err_unlock; } mutex_unlock(&state->internal->demod_lock); @@ -4005,8 +4005,10 @@ static int stv090x_sleep(struct dvb_frontend *fe) err_gateoff: stv090x_i2c_gate_ctrl(state, 0); -err: + goto err; +err_unlock: mutex_unlock(&state->internal->demod_lock); +err: dprintk(FE_ERROR, 1, "I/O error"); return -1; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
