Building with CONFIG_OF disabled produces a compiler warning:
drivers/iio/adc/stm32-dfsdm-core.c: In function 'stm32_dfsdm_probe':
drivers/iio/adc/stm32-dfsdm-core.c:245:22: error: unused variable 'pnode' [-Werror=unused-variable]
This removes the variable and open-codes it in the only place
it gets used to avoid that warning.
Fixes: bed73904e76f ("IIO: ADC: add stm32 DFSDM core support")
Signed-off-by: Arnd Bergmann <[email protected]>
---
drivers/iio/adc/stm32-dfsdm-core.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/iio/adc/stm32-dfsdm-core.c b/drivers/iio/adc/stm32-dfsdm-core.c
index 72427414db7f..6cd655f8239b 100644
--- a/drivers/iio/adc/stm32-dfsdm-core.c
+++ b/drivers/iio/adc/stm32-dfsdm-core.c
@@ -242,7 +242,6 @@ MODULE_DEVICE_TABLE(of, stm32_dfsdm_of_match);
static int stm32_dfsdm_probe(struct platform_device *pdev)
{
struct dfsdm_priv *priv;
- struct device_node *pnode = pdev->dev.of_node;
const struct of_device_id *of_id;
const struct stm32_dfsdm_dev_data *dev_data;
struct stm32_dfsdm *dfsdm;
@@ -254,7 +253,7 @@ static int stm32_dfsdm_probe(struct platform_device *pdev)
priv->pdev = pdev;
- of_id = of_match_node(stm32_dfsdm_of_match, pnode);
+ of_id = of_match_node(stm32_dfsdm_of_match, pdev->dev.of_node);
if (!of_id->data) {
dev_err(&pdev->dev, "Data associated to device is missing\n");
return -EINVAL;
--
2.9.0
On 11/01/18 10:34, Arnd Bergmann wrote:
> Building with CONFIG_OF disabled produces a compiler warning:
>
> drivers/iio/adc/stm32-dfsdm-core.c: In function 'stm32_dfsdm_probe':
> drivers/iio/adc/stm32-dfsdm-core.c:245:22: error: unused variable 'pnode' [-Werror=unused-variable]
>
> This removes the variable and open-codes it in the only place
> it gets used to avoid that warning.
>
> Fixes: bed73904e76f ("IIO: ADC: add stm32 DFSDM core support")
> Signed-off-by: Arnd Bergmann <[email protected]>
> ---
> drivers/iio/adc/stm32-dfsdm-core.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/iio/adc/stm32-dfsdm-core.c b/drivers/iio/adc/stm32-dfsdm-core.c
> index 72427414db7f..6cd655f8239b 100644
> --- a/drivers/iio/adc/stm32-dfsdm-core.c
> +++ b/drivers/iio/adc/stm32-dfsdm-core.c
> @@ -242,7 +242,6 @@ MODULE_DEVICE_TABLE(of, stm32_dfsdm_of_match);
> static int stm32_dfsdm_probe(struct platform_device *pdev)
> {
> struct dfsdm_priv *priv;
> - struct device_node *pnode = pdev->dev.of_node;
> const struct of_device_id *of_id;
> const struct stm32_dfsdm_dev_data *dev_data;
> struct stm32_dfsdm *dfsdm;
> @@ -254,7 +253,7 @@ static int stm32_dfsdm_probe(struct platform_device *pdev)
>
> priv->pdev = pdev;
>
> - of_id = of_match_node(stm32_dfsdm_of_match, pnode);
> + of_id = of_match_node(stm32_dfsdm_of_match, pdev->dev.of_node);
> if (!of_id->data) {
> dev_err(&pdev->dev, "Data associated to device is missing\n");
> return -EINVAL;
FWIW, it looks like this whole lot could be cleaned up by using
of_device_get_match_data().
Robin.
On 01/11/2018 03:27 PM, Robin Murphy wrote:
> On 11/01/18 10:34, Arnd Bergmann wrote:
>> Building with CONFIG_OF disabled produces a compiler warning:
>>
>> drivers/iio/adc/stm32-dfsdm-core.c: In function 'stm32_dfsdm_probe':
>> drivers/iio/adc/stm32-dfsdm-core.c:245:22: error: unused variable
>> 'pnode' [-Werror=unused-variable]
>>
>> This removes the variable and open-codes it in the only place
>> it gets used to avoid that warning.
>>
>> Fixes: bed73904e76f ("IIO: ADC: add stm32 DFSDM core support")
>> Signed-off-by: Arnd Bergmann <[email protected]>
>> ---
>> drivers/iio/adc/stm32-dfsdm-core.c | 3 +--
>> 1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/iio/adc/stm32-dfsdm-core.c
>> b/drivers/iio/adc/stm32-dfsdm-core.c
>> index 72427414db7f..6cd655f8239b 100644
>> --- a/drivers/iio/adc/stm32-dfsdm-core.c
>> +++ b/drivers/iio/adc/stm32-dfsdm-core.c
>> @@ -242,7 +242,6 @@ MODULE_DEVICE_TABLE(of, stm32_dfsdm_of_match);
>> static int stm32_dfsdm_probe(struct platform_device *pdev)
>> {
>> struct dfsdm_priv *priv;
>> - struct device_node *pnode = pdev->dev.of_node;
>> const struct of_device_id *of_id;
>> const struct stm32_dfsdm_dev_data *dev_data;
>> struct stm32_dfsdm *dfsdm;
>> @@ -254,7 +253,7 @@ static int stm32_dfsdm_probe(struct
>> platform_device *pdev)
>> priv->pdev = pdev;
>> - of_id = of_match_node(stm32_dfsdm_of_match, pnode);
>> + of_id = of_match_node(stm32_dfsdm_of_match, pdev->dev.of_node);
>> if (!of_id->data) {
>> dev_err(&pdev->dev, "Data associated to device is missing\n");
>> return -EINVAL;
>
> FWIW, it looks like this whole lot could be cleaned up by using
> of_device_get_match_data().
>
Right, and test of the return now seems to me an overprotection as data
structure is defined in the driver...
Same optimization could be applied to stm32_dfsdm_adc_probe function.
Here is the patch I tested:
---
drivers/iio/adc/stm32-dfsdm-adc.c | 9 +--------
drivers/iio/adc/stm32-dfsdm-core.c | 9 +--------
2 files changed, 2 insertions(+), 16 deletions(-)
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c
b/drivers/iio/adc/stm32-dfsdm-adc.c
index b03ca3f..01836c9 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -1087,18 +1087,11 @@ static int stm32_dfsdm_adc_probe(struct
platform_device *pdev)
struct device_node *np = dev->of_node;
const struct stm32_dfsdm_dev_data *dev_data;
struct iio_dev *iio;
- const struct of_device_id *of_id;
char *name;
int ret, irq, val;
- of_id = of_match_node(stm32_dfsdm_adc_match, np);
- if (!of_id->data) {
- dev_err(&pdev->dev, "Data associated to device is missing\n");
- return -EINVAL;
- }
-
- dev_data = (const struct stm32_dfsdm_dev_data *)of_id->data;
+ dev_data = of_device_get_match_data(dev);
iio = devm_iio_device_alloc(dev, sizeof(*adc));
if (IS_ERR(iio)) {
dev_err(dev, "%s: Failed to allocate IIO\n", __func__);
diff --git a/drivers/iio/adc/stm32-dfsdm-core.c
b/drivers/iio/adc/stm32-dfsdm-core.c
index 7242741..6290332 100644
--- a/drivers/iio/adc/stm32-dfsdm-core.c
+++ b/drivers/iio/adc/stm32-dfsdm-core.c
@@ -242,8 +242,6 @@ MODULE_DEVICE_TABLE(of, stm32_dfsdm_of_match);
static int stm32_dfsdm_probe(struct platform_device *pdev)
{
struct dfsdm_priv *priv;
- struct device_node *pnode = pdev->dev.of_node;
- const struct of_device_id *of_id;
const struct stm32_dfsdm_dev_data *dev_data;
struct stm32_dfsdm *dfsdm;
int ret;
@@ -254,13 +252,8 @@ static int stm32_dfsdm_probe(struct platform_device
*pdev)
priv->pdev = pdev;
- of_id = of_match_node(stm32_dfsdm_of_match, pnode);
- if (!of_id->data) {
- dev_err(&pdev->dev, "Data associated to device is missing\n");
- return -EINVAL;
- }
+ dev_data = of_device_get_match_data(&pdev->dev);
- dev_data = (const struct stm32_dfsdm_dev_data *)of_id->data;
dfsdm = &priv->dfsdm;
dfsdm->fl_list = devm_kcalloc(&pdev->dev, dev_data->num_filters,
sizeof(*dfsdm->fl_list), GFP_KERNEL);
--
Arnd,
fell free to propose it (with my acked-by) or tell me if you
prefer that i send it.
Thanks,
Arnaud
On Thu, 11 Jan 2018 18:38:49 +0100
Arnaud Pouliquen <[email protected]> wrote:
> On 01/11/2018 03:27 PM, Robin Murphy wrote:
> > On 11/01/18 10:34, Arnd Bergmann wrote:
> >> Building with CONFIG_OF disabled produces a compiler warning:
> >>
> >> drivers/iio/adc/stm32-dfsdm-core.c: In function 'stm32_dfsdm_probe':
> >> drivers/iio/adc/stm32-dfsdm-core.c:245:22: error: unused variable
> >> 'pnode' [-Werror=unused-variable]
> >>
> >> This removes the variable and open-codes it in the only place
> >> it gets used to avoid that warning.
> >>
> >> Fixes: bed73904e76f ("IIO: ADC: add stm32 DFSDM core support")
> >> Signed-off-by: Arnd Bergmann <[email protected]>
> >> ---
> >> drivers/iio/adc/stm32-dfsdm-core.c | 3 +--
> >> 1 file changed, 1 insertion(+), 2 deletions(-)
> >>
> >> diff --git a/drivers/iio/adc/stm32-dfsdm-core.c
> >> b/drivers/iio/adc/stm32-dfsdm-core.c
> >> index 72427414db7f..6cd655f8239b 100644
> >> --- a/drivers/iio/adc/stm32-dfsdm-core.c
> >> +++ b/drivers/iio/adc/stm32-dfsdm-core.c
> >> @@ -242,7 +242,6 @@ MODULE_DEVICE_TABLE(of, stm32_dfsdm_of_match);
> >> static int stm32_dfsdm_probe(struct platform_device *pdev)
> >> {
> >> struct dfsdm_priv *priv;
> >> - struct device_node *pnode = pdev->dev.of_node;
> >> const struct of_device_id *of_id;
> >> const struct stm32_dfsdm_dev_data *dev_data;
> >> struct stm32_dfsdm *dfsdm;
> >> @@ -254,7 +253,7 @@ static int stm32_dfsdm_probe(struct
> >> platform_device *pdev)
> >> priv->pdev = pdev;
> >> - of_id = of_match_node(stm32_dfsdm_of_match, pnode);
> >> + of_id = of_match_node(stm32_dfsdm_of_match, pdev->dev.of_node);
> >> if (!of_id->data) {
> >> dev_err(&pdev->dev, "Data associated to device is missing\n");
> >> return -EINVAL;
> >
> > FWIW, it looks like this whole lot could be cleaned up by using
> > of_device_get_match_data().
> >
> Right, and test of the return now seems to me an overprotection as data
> structure is defined in the driver...
>
> Same optimization could be applied to stm32_dfsdm_adc_probe function.
>
> Here is the patch I tested:
This looks like a good solution to me.
Acked-by: Jonathan Cameron <[email protected]>
(given this should probably go on Mark's immutable branch).
Jonathan
>
> ---
> drivers/iio/adc/stm32-dfsdm-adc.c | 9 +--------
> drivers/iio/adc/stm32-dfsdm-core.c | 9 +--------
> 2 files changed, 2 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c
> b/drivers/iio/adc/stm32-dfsdm-adc.c
> index b03ca3f..01836c9 100644
> --- a/drivers/iio/adc/stm32-dfsdm-adc.c
> +++ b/drivers/iio/adc/stm32-dfsdm-adc.c
> @@ -1087,18 +1087,11 @@ static int stm32_dfsdm_adc_probe(struct
> platform_device *pdev)
> struct device_node *np = dev->of_node;
> const struct stm32_dfsdm_dev_data *dev_data;
> struct iio_dev *iio;
> - const struct of_device_id *of_id;
> char *name;
> int ret, irq, val;
>
> - of_id = of_match_node(stm32_dfsdm_adc_match, np);
> - if (!of_id->data) {
> - dev_err(&pdev->dev, "Data associated to device is missing\n");
> - return -EINVAL;
> - }
> -
> - dev_data = (const struct stm32_dfsdm_dev_data *)of_id->data;
>
> + dev_data = of_device_get_match_data(dev);
> iio = devm_iio_device_alloc(dev, sizeof(*adc));
> if (IS_ERR(iio)) {
> dev_err(dev, "%s: Failed to allocate IIO\n", __func__);
> diff --git a/drivers/iio/adc/stm32-dfsdm-core.c
> b/drivers/iio/adc/stm32-dfsdm-core.c
> index 7242741..6290332 100644
> --- a/drivers/iio/adc/stm32-dfsdm-core.c
> +++ b/drivers/iio/adc/stm32-dfsdm-core.c
> @@ -242,8 +242,6 @@ MODULE_DEVICE_TABLE(of, stm32_dfsdm_of_match);
> static int stm32_dfsdm_probe(struct platform_device *pdev)
> {
> struct dfsdm_priv *priv;
> - struct device_node *pnode = pdev->dev.of_node;
> - const struct of_device_id *of_id;
> const struct stm32_dfsdm_dev_data *dev_data;
> struct stm32_dfsdm *dfsdm;
> int ret;
> @@ -254,13 +252,8 @@ static int stm32_dfsdm_probe(struct platform_device
> *pdev)
>
> priv->pdev = pdev;
>
> - of_id = of_match_node(stm32_dfsdm_of_match, pnode);
> - if (!of_id->data) {
> - dev_err(&pdev->dev, "Data associated to device is missing\n");
> - return -EINVAL;
> - }
> + dev_data = of_device_get_match_data(&pdev->dev);
>
> - dev_data = (const struct stm32_dfsdm_dev_data *)of_id->data;
> dfsdm = &priv->dfsdm;
> dfsdm->fl_list = devm_kcalloc(&pdev->dev, dev_data->num_filters,
> sizeof(*dfsdm->fl_list), GFP_KERNEL);