| Message ID | 20220627193402.21553-1-jmaneyrol@invensense.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | iio: fix iio_format_avail_range() printing for none IIO_VAL_INT | expand |
On 6/27/22 21:34, Jean-Baptiste Maneyrol wrote: > From: Fawzi Khaber <fawzi.khaber@tdk.com> > > iio_format_avail_range() should print range as follow [min, step, max], so > the function was previously calling iio_format_list() with length = 3, > length variable refers to the array size of values not the number of > elements. In case of non IIO_VAL_INT values each element has integer part > and decimal part. With length = 3 this would cause premature end of loop > and result in printing only one element. > > Signed-off-by: Fawzi Khaber <fawzi.khaber@tdk.com> > Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com> > --- > drivers/iio/industrialio-core.c | 18 +++++++++++++++++- > 1 file changed, 17 insertions(+), 1 deletion(-) > > diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c > index 358b909298c0..0f4dbda3b9d3 100644 > --- a/drivers/iio/industrialio-core.c > +++ b/drivers/iio/industrialio-core.c > @@ -812,7 +812,23 @@ static ssize_t iio_format_avail_list(char *buf, const int *vals, > > static ssize_t iio_format_avail_range(char *buf, const int *vals, int type) > { > - return iio_format_list(buf, vals, type, 3, "[", "]"); > + int length; > + > + /* > + * length refers to the array size , not the number of elements. > + * The purpose is to print the range [min , step ,max] so length should > + * be 3 in case of int, and 6 for other types. > + */ > + switch (type) { > + case IIO_VAL_INT: > + length = 3; > + break; > + default: > + length = 6; > + break; > + } > + > + return iio_format_list(buf, vals, type, length, "[", "]"); > } > > static ssize_t iio_read_channel_info_avail(struct device *dev, Change looks good! Lets also add a unit test for this in iio-test-format.c
Hello Lars, iio-test-format.c is for testing iio_format_value() function, not iio_format_avail_range(). And the problem with this function is that it is only a static helper in industrialio_core.c. The main function is iio_read_channel_info_avail(), which doesn't look to be easily testable. Thanks, JB From: Lars-Peter Clausen <lars@metafoo.de> Sent: Tuesday, June 28, 2022 00:06 To: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>; jic23@kernel.org <jic23@kernel.org> Cc: linux-iio@vger.kernel.org <linux-iio@vger.kernel.org>; Fawzi Khaber <Fawzi.Khaber@tdk.com>; Jean-Baptiste Maneyrol <Jean-Baptiste.Maneyrol@tdk.com> Subject: Re: [PATCH] iio: fix iio_format_avail_range() printing for none IIO_VAL_INT [CAUTION] This is EXTERNAL email. Do not click any links or open attachments unless you recognize the sender and know the content is safe. ====================================================================== On 6/27/22 21:34, Jean-Baptiste Maneyrol wrote: > From: Fawzi Khaber <fawzi.khaber@tdk.com> > > iio_format_avail_range() should print range as follow [min, step, max], so > the function was previously calling iio_format_list() with length = 3, > length variable refers to the array size of values not the number of > elements. In case of non IIO_VAL_INT values each element has integer part > and decimal part. With length = 3 this would cause premature end of loop > and result in printing only one element. > > Signed-off-by: Fawzi Khaber <fawzi.khaber@tdk.com> > Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com> > --- > drivers/iio/industrialio-core.c | 18 +++++++++++++++++- > 1 file changed, 17 insertions(+), 1 deletion(-) > > diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c > index 358b909298c0..0f4dbda3b9d3 100644 > --- a/drivers/iio/industrialio-core.c > +++ b/drivers/iio/industrialio-core.c > @@ -812,7 +812,23 @@ static ssize_t iio_format_avail_list(char *buf, const int *vals, > > static ssize_t iio_format_avail_range(char *buf, const int *vals, int type) > { > - return iio_format_list(buf, vals, type, 3, "[", "]"); > + int length; > + > + /* > + * length refers to the array size , not the number of elements. > + * The purpose is to print the range [min , step ,max] so length should > + * be 3 in case of int, and 6 for other types. > + */ > + switch (type) { > + case IIO_VAL_INT: > + length = 3; > + break; > + default: > + length = 6; > + break; > + } > + > + return iio_format_list(buf, vals, type, length, "[", "]"); > } > > static ssize_t iio_read_channel_info_avail(struct device *dev, Change looks good! Lets also add a unit test for this in iio-test-format.c
On Mon, 27 Jun 2022 21:34:02 +0200 Jean-Baptiste Maneyrol <jmaneyrol@invensense.com> wrote: > From: Fawzi Khaber <fawzi.khaber@tdk.com> > > iio_format_avail_range() should print range as follow [min, step, max], so > the function was previously calling iio_format_list() with length = 3, > length variable refers to the array size of values not the number of > elements. In case of non IIO_VAL_INT values each element has integer part > and decimal part. With length = 3 this would cause premature end of loop > and result in printing only one element. > > Signed-off-by: Fawzi Khaber <fawzi.khaber@tdk.com> > Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com> Fixes tag? Otherwise looks good to me. > --- > drivers/iio/industrialio-core.c | 18 +++++++++++++++++- > 1 file changed, 17 insertions(+), 1 deletion(-) > > diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c > index 358b909298c0..0f4dbda3b9d3 100644 > --- a/drivers/iio/industrialio-core.c > +++ b/drivers/iio/industrialio-core.c > @@ -812,7 +812,23 @@ static ssize_t iio_format_avail_list(char *buf, const int *vals, > > static ssize_t iio_format_avail_range(char *buf, const int *vals, int type) > { > - return iio_format_list(buf, vals, type, 3, "[", "]"); > + int length; > + > + /* > + * length refers to the array size , not the number of elements. > + * The purpose is to print the range [min , step ,max] so length should > + * be 3 in case of int, and 6 for other types. > + */ > + switch (type) { > + case IIO_VAL_INT: > + length = 3; > + break; > + default: > + length = 6; > + break; > + } > + > + return iio_format_list(buf, vals, type, length, "[", "]"); > } > > static ssize_t iio_read_channel_info_avail(struct device *dev,
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 358b909298c0..0f4dbda3b9d3 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -812,7 +812,23 @@ static ssize_t iio_format_avail_list(char *buf, const int *vals, static ssize_t iio_format_avail_range(char *buf, const int *vals, int type) { - return iio_format_list(buf, vals, type, 3, "[", "]"); + int length; + + /* + * length refers to the array size , not the number of elements. + * The purpose is to print the range [min , step ,max] so length should + * be 3 in case of int, and 6 for other types. + */ + switch (type) { + case IIO_VAL_INT: + length = 3; + break; + default: + length = 6; + break; + } + + return iio_format_list(buf, vals, type, length, "[", "]"); } static ssize_t iio_read_channel_info_avail(struct device *dev,