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| author |   Peter Rosin <peda@axentia.se> | 2018-06-20 07:17:59 +0200 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2018-07-13 00:09:25 +0200 |
| commit | dfecde407623b19cb9d57ebfa5abbca9741d96cb (patch) | |
| tree | 66f0172a8ea9013ab3e69f92a2cff2c5c10cea1b /drivers/media/dvb-frontends/rtl2830.c | |
| parent | media: drxk_hard: switch to i2c_lock_bus(..., I2C_LOCK_SEGMENT) (diff) | |
| download | linux-dev-dfecde407623b19cb9d57ebfa5abbca9741d96cb.tar.xz linux-dev-dfecde407623b19cb9d57ebfa5abbca9741d96cb.zip | |
media: rtl2830: 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 <peda@axentia.se>
Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/media/dvb-frontends/rtl2830.c')
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2830.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/media/dvb-frontends/rtl2830.c b/drivers/media/dvb-frontends/rtl2830.c index 7bbfe11d11ed..91d12e6a03d5 100644 --- a/drivers/media/dvb-frontends/rtl2830.c +++ b/drivers/media/dvb-frontends/rtl2830.c @@ -24,9 +24,9 @@ static int rtl2830_bulk_write(struct i2c_client *client, unsigned int reg, struct rtl2830_dev *dev = i2c_get_clientdata(client); int ret; - i2c_lock_adapter(client->adapter); + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); ret = regmap_bulk_write(dev->regmap, reg, val, val_count); - i2c_unlock_adapter(client->adapter); + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); return ret; } @@ -36,9 +36,9 @@ static int rtl2830_update_bits(struct i2c_client *client, unsigned int reg, struct rtl2830_dev *dev = i2c_get_clientdata(client); int ret; - i2c_lock_adapter(client->adapter); + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); ret = regmap_update_bits(dev->regmap, reg, mask, val); - i2c_unlock_adapter(client->adapter); + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); return ret; } @@ -48,9 +48,9 @@ static int rtl2830_bulk_read(struct i2c_client *client, unsigned int reg, struct rtl2830_dev *dev = i2c_get_clientdata(client); int ret; - i2c_lock_adapter(client->adapter); + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); ret = regmap_bulk_read(dev->regmap, reg, val, val_count); - i2c_unlock_adapter(client->adapter); + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); return ret; } |