From 581733e619ad66908e02351f8a412d04149a2e90 Mon Sep 17 00:00:00 2001 From: Peter Rosin Date: Wed, 20 Jun 2018 07:18:01 +0200 Subject: [PATCH] media: tda18271: switch to i2c_lock_bus(..., I2C_LOCK_SEGMENT) Locking the root adapter for __i2c_transfer will deadlock if the device sits behind a mux-locked I2C mux. Switch to the finer-grained i2c_lock_bus with the I2C_LOCK_SEGMENT flag. If the device does not sit behind a mux-locked mux, the two locking variants are equivalent. Signed-off-by: Peter Rosin Acked-by: Mauro Carvalho Chehab Signed-off-by: Wolfram Sang --- drivers/media/tuners/tda18271-common.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/media/tuners/tda18271-common.c b/drivers/media/tuners/tda18271-common.c index 7e81cd887c13..054b3b747dae 100644 --- a/drivers/media/tuners/tda18271-common.c +++ b/drivers/media/tuners/tda18271-common.c @@ -225,7 +225,7 @@ static int __tda18271_write_regs(struct dvb_frontend *fe, int idx, int len, */ if (lock_i2c) { tda18271_i2c_gate_ctrl(fe, 1); - i2c_lock_adapter(priv->i2c_props.adap); + i2c_lock_bus(priv->i2c_props.adap, I2C_LOCK_SEGMENT); } while (len) { if (max > len) @@ -246,7 +246,7 @@ static int __tda18271_write_regs(struct dvb_frontend *fe, int idx, int len, len -= max; } if (lock_i2c) { - i2c_unlock_adapter(priv->i2c_props.adap); + i2c_unlock_bus(priv->i2c_props.adap, I2C_LOCK_SEGMENT); tda18271_i2c_gate_ctrl(fe, 0); } @@ -300,7 +300,7 @@ int tda18271_init_regs(struct dvb_frontend *fe) * as those could cause bad things */ tda18271_i2c_gate_ctrl(fe, 1); - i2c_lock_adapter(priv->i2c_props.adap); + i2c_lock_bus(priv->i2c_props.adap, I2C_LOCK_SEGMENT); /* initialize registers */ switch (priv->id) { @@ -516,7 +516,7 @@ int tda18271_init_regs(struct dvb_frontend *fe) /* synchronize */ __tda18271_write_regs(fe, R_EP1, 1, false); - i2c_unlock_adapter(priv->i2c_props.adap); + i2c_unlock_bus(priv->i2c_props.adap, I2C_LOCK_SEGMENT); tda18271_i2c_gate_ctrl(fe, 0); return 0; -- 2.11.0