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spf=pass smtp.mailfrom=driverdev-devel-bounces@linuxdriverproject.org smtp.helo=fraxinus.osuosl.org; x-aligned-from=fail; x-google-dkim=fail (message has been altered, 2048-bit rsa key) header.d=1e100.net header.i=@1e100.net header.b=m1eh9X0l; x-ptr=fail x-ptr-helo=fraxinus.osuosl.org x-ptr-lookup=smtp4.osuosl.org; x-return-mx=pass smtp.domain=linuxdriverproject.org smtp.result=pass smtp_is_org_domain=yes header.domain=gmail.com header.result=pass header_is_org_domain=yes; x-tls=pass version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-Remote-Delivered-To: driverdev-devel@osuosl.org X-Google-Smtp-Source: AG47ELsaPQLTDXr01QtN0JjMe6/khvUarNlZV27ynMYqHoueKM36OghoF2SlZYhMmFyUMm/Ik8FC2Q== From: John Syne X-Google-Original-From: John Syne Date: Fri, 23 Mar 2018 11:22:10 -0300 To: John Syne , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Greg Kroah-Hartman , linux-iio@vger.kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Barry Song <21cnbao@gmail.com> Subject: [PATCH v3 1/8] staging:iio:ade7854: Fix error handling on read/write Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180223 X-BeenThere: driverdev-devel@linuxdriverproject.org X-Mailman-Version: 2.1.24 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-iio@vger.kernel.org, devel@driverdev.osuosl.org, daniel.baluta@nxp.com, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Fixes: correctly handle errors on the read and write operation for I2C 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. Signed-off-by: John Syne Signed-off-by: Rodrigo Siqueira --- Changes in v3: - Clarify authorship - Add Fixes tag in the commit message 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 _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel