* [PATCH] media: stm32-dcmi: fix irq = 0 case
@ 2019-05-31 9:18 Fabien Dessenne
2019-05-31 9:30 ` Pavel Machek
2019-06-03 11:45 ` Hans Verkuil
0 siblings, 2 replies; 5+ messages in thread
From: Fabien Dessenne @ 2019-05-31 9:18 UTC (permalink / raw)
To: Hugues Fruchet, Mauro Carvalho Chehab, Maxime Coquelin,
Alexandre Torgue, Pavel Machek, Hans Verkuil, linux-media,
linux-stm32, linux-arm-kernel, linux-kernel
Cc: Sasha Levin, Greg Kroah-Hartman, Fabien Dessenne
Manage the irq = 0 case, where we shall return an error.
Fixes: b5b5a27bee58 ("media: stm32-dcmi: return appropriate error codes during probe")
Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
---
drivers/media/platform/stm32/stm32-dcmi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
index b9dad0a..d855e9c 100644
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -1702,7 +1702,7 @@ static int dcmi_probe(struct platform_device *pdev)
if (irq <= 0) {
if (irq != -EPROBE_DEFER)
dev_err(&pdev->dev, "Could not get irq\n");
- return irq;
+ return irq ? irq : -ENXIO;
}
dcmi->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
--
2.7.4
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^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] media: stm32-dcmi: fix irq = 0 case
2019-05-31 9:18 [PATCH] media: stm32-dcmi: fix irq = 0 case Fabien Dessenne
@ 2019-05-31 9:30 ` Pavel Machek
2019-06-03 11:45 ` Hans Verkuil
1 sibling, 0 replies; 5+ messages in thread
From: Pavel Machek @ 2019-05-31 9:30 UTC (permalink / raw)
To: Fabien Dessenne
Cc: Sasha Levin, Alexandre Torgue, Pavel Machek, linux-kernel,
Maxime Coquelin, Greg Kroah-Hartman, Hans Verkuil,
Hugues Fruchet, Mauro Carvalho Chehab, linux-stm32,
linux-arm-kernel, linux-media
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On Fri 2019-05-31 11:18:15, Fabien Dessenne wrote:
> Manage the irq = 0 case, where we shall return an error.
>
> Fixes: b5b5a27bee58 ("media: stm32-dcmi: return appropriate error codes during probe")
> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Reported-by: Pavel Machek <pavel@ucw.cz>
:-).
Pavel
> +++ b/drivers/media/platform/stm32/stm32-dcmi.c
> @@ -1702,7 +1702,7 @@ static int dcmi_probe(struct platform_device *pdev)
> if (irq <= 0) {
> if (irq != -EPROBE_DEFER)
> dev_err(&pdev->dev, "Could not get irq\n");
> - return irq;
> + return irq ? irq : -ENXIO;
> }
>
> dcmi->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] media: stm32-dcmi: fix irq = 0 case
2019-05-31 9:18 [PATCH] media: stm32-dcmi: fix irq = 0 case Fabien Dessenne
2019-05-31 9:30 ` Pavel Machek
@ 2019-06-03 11:45 ` Hans Verkuil
2019-06-03 13:03 ` Fabien DESSENNE
1 sibling, 1 reply; 5+ messages in thread
From: Hans Verkuil @ 2019-06-03 11:45 UTC (permalink / raw)
To: Fabien Dessenne, Hugues Fruchet, Mauro Carvalho Chehab,
Maxime Coquelin, Alexandre Torgue, Pavel Machek, linux-media,
linux-stm32, linux-arm-kernel, linux-kernel
Cc: Sasha Levin, Greg Kroah-Hartman
On 5/31/19 11:18 AM, Fabien Dessenne wrote:
> Manage the irq = 0 case, where we shall return an error.
>
> Fixes: b5b5a27bee58 ("media: stm32-dcmi: return appropriate error codes during probe")
> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
> ---
> drivers/media/platform/stm32/stm32-dcmi.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
> index b9dad0a..d855e9c 100644
> --- a/drivers/media/platform/stm32/stm32-dcmi.c
> +++ b/drivers/media/platform/stm32/stm32-dcmi.c
> @@ -1702,7 +1702,7 @@ static int dcmi_probe(struct platform_device *pdev)
> if (irq <= 0) {
Shouldn't this be 'irq < 0' instead of '<=' ?
AFAICT irq == 0 can be a valid irq and isn't an error.
Regards,
Hans
> if (irq != -EPROBE_DEFER)
> dev_err(&pdev->dev, "Could not get irq\n");
> - return irq;
> + return irq ? irq : -ENXIO;
> }
>
> dcmi->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] media: stm32-dcmi: fix irq = 0 case
2019-06-03 11:45 ` Hans Verkuil
@ 2019-06-03 13:03 ` Fabien DESSENNE
2019-06-03 13:08 ` Hans Verkuil
0 siblings, 1 reply; 5+ messages in thread
From: Fabien DESSENNE @ 2019-06-03 13:03 UTC (permalink / raw)
To: Hans Verkuil, Hugues FRUCHET, Mauro Carvalho Chehab,
Maxime Coquelin, Alexandre TORGUE, Pavel Machek, linux-media,
linux-stm32, linux-arm-kernel, linux-kernel
Cc: Sasha Levin, Greg Kroah-Hartman
Hi Hans
"platform_get_irq() = 0" shall be considered as an error. See these
discussions:
https://patchwork.kernel.org/patch/10006651/
https://yarchive.net/comp/linux/zero.html
BR
Fabien
On 03/06/2019 1:45 PM, Hans Verkuil wrote:
> On 5/31/19 11:18 AM, Fabien Dessenne wrote:
>> Manage the irq = 0 case, where we shall return an error.
>>
>> Fixes: b5b5a27bee58 ("media: stm32-dcmi: return appropriate error codes during probe")
>> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
>> ---
>> drivers/media/platform/stm32/stm32-dcmi.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
>> index b9dad0a..d855e9c 100644
>> --- a/drivers/media/platform/stm32/stm32-dcmi.c
>> +++ b/drivers/media/platform/stm32/stm32-dcmi.c
>> @@ -1702,7 +1702,7 @@ static int dcmi_probe(struct platform_device *pdev)
>> if (irq <= 0) {
> Shouldn't this be 'irq < 0' instead of '<=' ?
>
> AFAICT irq == 0 can be a valid irq and isn't an error.
>
> Regards,
>
> Hans
>
>> if (irq != -EPROBE_DEFER)
>> dev_err(&pdev->dev, "Could not get irq\n");
>> - return irq;
>> + return irq ? irq : -ENXIO;
>> }
>>
>> dcmi->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] media: stm32-dcmi: fix irq = 0 case
2019-06-03 13:03 ` Fabien DESSENNE
@ 2019-06-03 13:08 ` Hans Verkuil
0 siblings, 0 replies; 5+ messages in thread
From: Hans Verkuil @ 2019-06-03 13:08 UTC (permalink / raw)
To: Fabien DESSENNE, Hugues FRUCHET, Mauro Carvalho Chehab,
Maxime Coquelin, Alexandre TORGUE, Pavel Machek, linux-media,
linux-stm32, linux-arm-kernel, linux-kernel
Cc: Sasha Levin, Greg Kroah-Hartman
On 6/3/19 3:03 PM, Fabien DESSENNE wrote:
> Hi Hans
>
>
> "platform_get_irq() = 0" shall be considered as an error. See these
> discussions:
> https://patchwork.kernel.org/patch/10006651/
> https://yarchive.net/comp/linux/zero.html
Hmm, then many media drivers are wrong since most check for < 0.
In any case, I'll pick up this patch whenever I make a next pull request
for fixes like this.
Regards,
Hans
>
> BR
>
> Fabien
>
> On 03/06/2019 1:45 PM, Hans Verkuil wrote:
>> On 5/31/19 11:18 AM, Fabien Dessenne wrote:
>>> Manage the irq = 0 case, where we shall return an error.
>>>
>>> Fixes: b5b5a27bee58 ("media: stm32-dcmi: return appropriate error codes during probe")
>>> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
>>> ---
>>> drivers/media/platform/stm32/stm32-dcmi.c | 2 +-
>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
>>> index b9dad0a..d855e9c 100644
>>> --- a/drivers/media/platform/stm32/stm32-dcmi.c
>>> +++ b/drivers/media/platform/stm32/stm32-dcmi.c
>>> @@ -1702,7 +1702,7 @@ static int dcmi_probe(struct platform_device *pdev)
>>> if (irq <= 0) {
>> Shouldn't this be 'irq < 0' instead of '<=' ?
>>
>> AFAICT irq == 0 can be a valid irq and isn't an error.
>>
>> Regards,
>>
>> Hans
>>
>>> if (irq != -EPROBE_DEFER)
>>> dev_err(&pdev->dev, "Could not get irq\n");
>>> - return irq;
>>> + return irq ? irq : -ENXIO;
>>> }
>>>
>>> dcmi->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> >
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2019-05-31 9:18 [PATCH] media: stm32-dcmi: fix irq = 0 case Fabien Dessenne
2019-05-31 9:30 ` Pavel Machek
2019-06-03 11:45 ` Hans Verkuil
2019-06-03 13:03 ` Fabien DESSENNE
2019-06-03 13:08 ` Hans Verkuil
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