The original code does not correctly handle the error related to I2C read and write. This patch fixes the error handling related to all read/write functions for I2C. This patch is an adaptation of the John Syne patches. Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@xxxxxxxxx> Signed-off-by: John Syne <john3909@xxxxxxxxx> --- drivers/staging/iio/meter/ade7854-i2c.c | 24 ++++++++++++------------ drivers/staging/iio/meter/ade7854.c | 10 +++++----- 2 files changed, 17 insertions(+), 17 deletions(-) diff --git a/drivers/staging/iio/meter/ade7854-i2c.c b/drivers/staging/iio/meter/ade7854-i2c.c index 317e4f0d8176..4437f1e33261 100644 --- a/drivers/staging/iio/meter/ade7854-i2c.c +++ b/drivers/staging/iio/meter/ade7854-i2c.c @@ -31,7 +31,7 @@ static int ade7854_i2c_write_reg_8(struct device *dev, ret = i2c_master_send(st->i2c, st->tx, 3); mutex_unlock(&st->buf_lock); - return ret; + return ret < 0 ? ret : 0; } static int ade7854_i2c_write_reg_16(struct device *dev, @@ -51,7 +51,7 @@ static int ade7854_i2c_write_reg_16(struct device *dev, ret = i2c_master_send(st->i2c, st->tx, 4); mutex_unlock(&st->buf_lock); - return ret; + return ret < 0 ? ret : 0; } static int ade7854_i2c_write_reg_24(struct device *dev, @@ -72,7 +72,7 @@ static int ade7854_i2c_write_reg_24(struct device *dev, ret = i2c_master_send(st->i2c, st->tx, 5); mutex_unlock(&st->buf_lock); - return ret; + return ret < 0 ? ret : 0; } static int ade7854_i2c_write_reg_32(struct device *dev, @@ -94,7 +94,7 @@ static int ade7854_i2c_write_reg_32(struct device *dev, ret = i2c_master_send(st->i2c, st->tx, 6); mutex_unlock(&st->buf_lock); - return ret; + return ret < 0 ? ret : 0; } static int ade7854_i2c_read_reg_8(struct device *dev, @@ -110,11 +110,11 @@ static int ade7854_i2c_read_reg_8(struct device *dev, st->tx[1] = reg_address & 0xFF; ret = i2c_master_send(st->i2c, st->tx, 2); - if (ret) + if (ret < 0) goto out; ret = i2c_master_recv(st->i2c, st->rx, 1); - if (ret) + if (ret < 0) goto out; *val = st->rx[0]; @@ -136,11 +136,11 @@ static int ade7854_i2c_read_reg_16(struct device *dev, st->tx[1] = reg_address & 0xFF; ret = i2c_master_send(st->i2c, st->tx, 2); - if (ret) + if (ret < 0) goto out; ret = i2c_master_recv(st->i2c, st->rx, 2); - if (ret) + if (ret < 0) goto out; *val = (st->rx[0] << 8) | st->rx[1]; @@ -162,11 +162,11 @@ static int ade7854_i2c_read_reg_24(struct device *dev, st->tx[1] = reg_address & 0xFF; ret = i2c_master_send(st->i2c, st->tx, 2); - if (ret) + if (ret < 0) goto out; ret = i2c_master_recv(st->i2c, st->rx, 3); - if (ret) + if (ret < 0) goto out; *val = (st->rx[0] << 16) | (st->rx[1] << 8) | st->rx[2]; @@ -188,11 +188,11 @@ static int ade7854_i2c_read_reg_32(struct device *dev, st->tx[1] = reg_address & 0xFF; ret = i2c_master_send(st->i2c, st->tx, 2); - if (ret) + if (ret < 0) goto out; ret = i2c_master_recv(st->i2c, st->rx, 3); - if (ret) + if (ret < 0) goto out; *val = (st->rx[0] << 24) | (st->rx[1] << 16) | diff --git a/drivers/staging/iio/meter/ade7854.c b/drivers/staging/iio/meter/ade7854.c index 90d07cdca4b8..0193ae3aae29 100644 --- a/drivers/staging/iio/meter/ade7854.c +++ b/drivers/staging/iio/meter/ade7854.c @@ -33,7 +33,7 @@ static ssize_t ade7854_read_8bit(struct device *dev, struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); ret = st->read_reg_8(dev, this_attr->address, &val); - if (ret) + if (ret < 0) return ret; return sprintf(buf, "%u\n", val); @@ -50,7 +50,7 @@ static ssize_t ade7854_read_16bit(struct device *dev, struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); ret = st->read_reg_16(dev, this_attr->address, &val); - if (ret) + if (ret < 0) return ret; return sprintf(buf, "%u\n", val); @@ -67,7 +67,7 @@ static ssize_t ade7854_read_24bit(struct device *dev, struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); ret = st->read_reg_24(dev, this_attr->address, &val); - if (ret) + if (ret < 0) return ret; return sprintf(buf, "%u\n", val); @@ -84,7 +84,7 @@ static ssize_t ade7854_read_32bit(struct device *dev, struct ade7854_state *st = iio_priv(indio_dev); ret = st->read_reg_32(dev, this_attr->address, &val); - if (ret) + if (ret < 0) return ret; return sprintf(buf, "%u\n", val); @@ -416,7 +416,7 @@ static int ade7854_set_irq(struct device *dev, bool enable) u32 irqen; ret = st->read_reg_32(dev, ADE7854_MASK0, &irqen); - if (ret) + if (ret < 0) return ret; if (enable) -- 2.16.2 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
