| Message ID | 20200930065758.23740-1-pawell@cadence.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | usb: cdns3: platform_get_irq_byname_optional instead platform_get_irq_byname | expand |
Hi, My email server complains that delivery to peter.chan@nxp.org has failed. This address has generated by get_maintainer.pl. I only updated email to correct: peter.chan@nxp.com. Regards, Pawel >To avoid duplicate error information patch replaces platform_get_irq_byname >into platform_get_irq_byname_optional. > >A change was suggested during reviewing CDNSP driver by Chunfeng Yun. > >Signed-off-by: Pawel Laszczak <pawell@cadence.com> >--- > drivers/usb/cdns3/core.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > >diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c >index a0f73d4711ae..a3f6dc44cf3a 100644 >--- a/drivers/usb/cdns3/core.c >+++ b/drivers/usb/cdns3/core.c >@@ -465,7 +465,7 @@ static int cdns3_probe(struct platform_device *pdev) > > cdns->xhci_res[1] = *res; > >- cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >+ cdns->dev_irq = platform_get_irq_byname_optional(pdev, "peripheral"); > if (cdns->dev_irq == -EPROBE_DEFER) > return cdns->dev_irq; > >@@ -477,7 +477,7 @@ static int cdns3_probe(struct platform_device *pdev) > return PTR_ERR(regs); > cdns->dev_regs = regs; > >- cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); >+ cdns->otg_irq = platform_get_irq_byname_optional(pdev, "otg"); > if (cdns->otg_irq == -EPROBE_DEFER) > return cdns->otg_irq; > >-- >2.17.1
Pawel, On 30/09/2020 09:57, Pawel Laszczak wrote: > To avoid duplicate error information patch replaces platform_get_irq_byname > into platform_get_irq_byname_optional. What is duplicate error information? > > A change was suggested during reviewing CDNSP driver by Chunfeng Yun. > > Signed-off-by: Pawel Laszczak <pawell@cadence.com> > --- > drivers/usb/cdns3/core.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c > index a0f73d4711ae..a3f6dc44cf3a 100644 > --- a/drivers/usb/cdns3/core.c > +++ b/drivers/usb/cdns3/core.c > @@ -465,7 +465,7 @@ static int cdns3_probe(struct platform_device *pdev) > > cdns->xhci_res[1] = *res; > > - cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); > + cdns->dev_irq = platform_get_irq_byname_optional(pdev, "peripheral"); As per DT binding document, these are mandatory properties - interrupts: Interrupts used by cdns3 controller: "host" - interrupt used by XHCI driver. "peripheral" - interrupt used by device driver "otg" - interrupt used by DRD/OTG part of driver for dr_mode == "otg" -> all 3 are mandatory. for dr_mode == "host" -> "otg" and "peripheral" IRQs are not required. for dr_mode == "periphearal" -> "otg" and "host" IRQs are not required. > if (cdns->dev_irq == -EPROBE_DEFER) > return cdns->dev_irq; > > @@ -477,7 +477,7 @@ static int cdns3_probe(struct platform_device *pdev) > return PTR_ERR(regs); > cdns->dev_regs = regs; > > - cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); > + cdns->otg_irq = platform_get_irq_byname_optional(pdev, "otg"); > if (cdns->otg_irq == -EPROBE_DEFER) > return cdns->otg_irq; > > cheers, -roger
Roger, > >On 30/09/2020 09:57, Pawel Laszczak wrote: >> To avoid duplicate error information patch replaces platform_get_irq_byname >> into platform_get_irq_byname_optional. > >What is duplicate error information? The function platform_get_irq_byname print: " dev_err(&dev->dev, "IRQ %s not found\n", name);" if error occurred. In core.c we have the another error message below invoking this function. e.g if (cdns->dev_irq < 0) dev_err(dev, "couldn't get peripheral irq\n"); So, it's looks like one dev_err is redundant. > >> >> A change was suggested during reviewing CDNSP driver by Chunfeng Yun. >> >> Signed-off-by: Pawel Laszczak <pawell@cadence.com> >> --- >> drivers/usb/cdns3/core.c | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c >> index a0f73d4711ae..a3f6dc44cf3a 100644 >> --- a/drivers/usb/cdns3/core.c >> +++ b/drivers/usb/cdns3/core.c >> @@ -465,7 +465,7 @@ static int cdns3_probe(struct platform_device *pdev) >> >> cdns->xhci_res[1] = *res; >> >> - cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >> + cdns->dev_irq = platform_get_irq_byname_optional(pdev, "peripheral"); > >As per DT binding document, these are mandatory properties I think that name platform_get_irq_byname_optional is little confusing. Function descriptions show that both are almost identical: /** * platform_get_irq_byname_optional - get an optional IRQ for a device by name * @dev: platform device * @name: IRQ name * * Get an optional IRQ by name like platform_get_irq_byname(). Except that it * does not print an error message if an IRQ can not be obtained. * * Return: non-zero IRQ number on success, negative error number on failure. */ > > - interrupts: Interrupts used by cdns3 controller: > "host" - interrupt used by XHCI driver. > "peripheral" - interrupt used by device driver > "otg" - interrupt used by DRD/OTG part of driver > >for dr_mode == "otg" -> all 3 are mandatory. >for dr_mode == "host" -> "otg" and "peripheral" IRQs are not required. >for dr_mode == "periphearal" -> "otg" and "host" IRQs are not required. > >> if (cdns->dev_irq == -EPROBE_DEFER) >> return cdns->dev_irq; >> >> @@ -477,7 +477,7 @@ static int cdns3_probe(struct platform_device *pdev) >> return PTR_ERR(regs); >> cdns->dev_regs = regs; >> >> - cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); >> + cdns->otg_irq = platform_get_irq_byname_optional(pdev, "otg"); >> if (cdns->otg_irq == -EPROBE_DEFER) >> return cdns->otg_irq; >> >> > Regards, Pawel
Pawel, On 02/10/2020 12:08, Pawel Laszczak wrote: > Roger, > >> >> On 30/09/2020 09:57, Pawel Laszczak wrote: >>> To avoid duplicate error information patch replaces platform_get_irq_byname >>> into platform_get_irq_byname_optional. >> >> What is duplicate error information? > > The function platform_get_irq_byname print: > " dev_err(&dev->dev, "IRQ %s not found\n", name);" if error occurred. > > In core.c we have the another error message below invoking this function. > e.g > if (cdns->dev_irq < 0) > dev_err(dev, "couldn't get peripheral irq\n"); > > So, it's looks like one dev_err is redundant. If we want all 3 IRQs to be valid irrespective of dr_mode then we should use platform_get_irq_byname() and error out in probe if (ret < 0 && ret != -EPROBE_DEFER). We can get rid of the irq check and duplicate error message in other places. cheers, -roger > >> >>> >>> A change was suggested during reviewing CDNSP driver by Chunfeng Yun. >>> >>> Signed-off-by: Pawel Laszczak <pawell@cadence.com> >>> --- >>> drivers/usb/cdns3/core.c | 4 ++-- >>> 1 file changed, 2 insertions(+), 2 deletions(-) >>> >>> diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c >>> index a0f73d4711ae..a3f6dc44cf3a 100644 >>> --- a/drivers/usb/cdns3/core.c >>> +++ b/drivers/usb/cdns3/core.c >>> @@ -465,7 +465,7 @@ static int cdns3_probe(struct platform_device *pdev) >>> >>> cdns->xhci_res[1] = *res; >>> >>> - cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >>> + cdns->dev_irq = platform_get_irq_byname_optional(pdev, "peripheral"); >> >> As per DT binding document, these are mandatory properties > > I think that name platform_get_irq_byname_optional is little confusing. > Function descriptions show that both are almost identical: > /** > * platform_get_irq_byname_optional - get an optional IRQ for a device by name > * @dev: platform device > * @name: IRQ name > * > * Get an optional IRQ by name like platform_get_irq_byname(). Except that it > * does not print an error message if an IRQ can not be obtained. > * > * Return: non-zero IRQ number on success, negative error number on failure. > */ > >> >> - interrupts: Interrupts used by cdns3 controller: >> "host" - interrupt used by XHCI driver. >> "peripheral" - interrupt used by device driver >> "otg" - interrupt used by DRD/OTG part of driver >> >> for dr_mode == "otg" -> all 3 are mandatory. >> for dr_mode == "host" -> "otg" and "peripheral" IRQs are not required. >> for dr_mode == "periphearal" -> "otg" and "host" IRQs are not required. >> >>> if (cdns->dev_irq == -EPROBE_DEFER) >>> return cdns->dev_irq; >>> >>> @@ -477,7 +477,7 @@ static int cdns3_probe(struct platform_device *pdev) >>> return PTR_ERR(regs); >>> cdns->dev_regs = regs; >>> >>> - cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); >>> + cdns->otg_irq = platform_get_irq_byname_optional(pdev, "otg"); >>> if (cdns->otg_irq == -EPROBE_DEFER) >>> return cdns->otg_irq; >>> >>> >> > > Regards, > Pawel >
Roger, > >Pawel, > >On 02/10/2020 12:08, Pawel Laszczak wrote: >> Roger, >> >>> >>> On 30/09/2020 09:57, Pawel Laszczak wrote: >>>> To avoid duplicate error information patch replaces platform_get_irq_byname >>>> into platform_get_irq_byname_optional. >>> >>> What is duplicate error information? >> >> The function platform_get_irq_byname print: >> " dev_err(&dev->dev, "IRQ %s not found\n", name);" if error occurred. >> >> In core.c we have the another error message below invoking this function. >> e.g >> if (cdns->dev_irq < 0) >> dev_err(dev, "couldn't get peripheral irq\n"); >> >> So, it's looks like one dev_err is redundant. > >If we want all 3 IRQs to be valid irrespective of dr_mode then we should >use platform_get_irq_byname() and error out in probe if (ret < 0 && ret != -EPROBE_DEFER). > >We can get rid of the irq check and duplicate error message in other places. To be sure we understand each other correctly. Are You suggesting to leave the platform_get_irq_byname() and rid of from core.c the following lines : if (cdns->dev_irq < 0) dev_err(dev, "couldn't get peripheral irq\n"); and dev_err(dev, "couldn't get otg irq\n"); ? A word of explanation why this patch has been sent. During reviewing the cdnsp driver Chunfeng Yun add such comment: " > + cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); > + if (cdns->dev_irq == -EPROBE_DEFER) > + return cdns->dev_irq; > + > + if (cdns->dev_irq < 0) > + dev_err(dev, "couldn't get peripheral irq\n"); Use platform_get_irq_byname_optional? otherwise no need print this log, platform_get_irq_byname() will print it. " In this patch I've chosen the platform_get_irq_byname_optional because both function do the same but the error message from core.c tell us little more then generic message from platform_get_irq_byname. Cheers Pawel Laszczak > >cheers, >-roger > >> >>> >>>> >>>> A change was suggested during reviewing CDNSP driver by Chunfeng Yun. >>>> >>>> Signed-off-by: Pawel Laszczak <pawell@cadence.com> >>>> --- >>>> drivers/usb/cdns3/core.c | 4 ++-- >>>> 1 file changed, 2 insertions(+), 2 deletions(-) >>>> >>>> diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c >>>> index a0f73d4711ae..a3f6dc44cf3a 100644 >>>> --- a/drivers/usb/cdns3/core.c >>>> +++ b/drivers/usb/cdns3/core.c >>>> @@ -465,7 +465,7 @@ static int cdns3_probe(struct platform_device *pdev) >>>> >>>> cdns->xhci_res[1] = *res; >>>> >>>> - cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >>>> + cdns->dev_irq = platform_get_irq_byname_optional(pdev, "peripheral"); >>> >>> As per DT binding document, these are mandatory properties >> >> I think that name platform_get_irq_byname_optional is little confusing. >> Function descriptions show that both are almost identical: >> /** >> * platform_get_irq_byname_optional - get an optional IRQ for a device by name >> * @dev: platform device >> * @name: IRQ name >> * >> * Get an optional IRQ by name like platform_get_irq_byname(). Except that it >> * does not print an error message if an IRQ can not be obtained. >> * >> * Return: non-zero IRQ number on success, negative error number on failure. >> */ >> >>> >>> - interrupts: Interrupts used by cdns3 controller: >>> "host" - interrupt used by XHCI driver. >>> "peripheral" - interrupt used by device driver >>> "otg" - interrupt used by DRD/OTG part of driver >>> >>> for dr_mode == "otg" -> all 3 are mandatory. >>> for dr_mode == "host" -> "otg" and "peripheral" IRQs are not required. >>> for dr_mode == "periphearal" -> "otg" and "host" IRQs are not required. >>> >>>> if (cdns->dev_irq == -EPROBE_DEFER) >>>> return cdns->dev_irq; >>>> >>>> @@ -477,7 +477,7 @@ static int cdns3_probe(struct platform_device *pdev) >>>> return PTR_ERR(regs); >>>> cdns->dev_regs = regs; >>>> >>>> - cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); >>>> + cdns->otg_irq = platform_get_irq_byname_optional(pdev, "otg"); >>>> if (cdns->otg_irq == -EPROBE_DEFER) >>>> return cdns->otg_irq; >>>> >>>> >>> >> >> Regards, >> Pawel >> > >-- >Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. >Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
Pawel, On 05/10/2020 08:54, Pawel Laszczak wrote: > Roger, >> >> Pawel, >> >> On 02/10/2020 12:08, Pawel Laszczak wrote: >>> Roger, >>> >>>> >>>> On 30/09/2020 09:57, Pawel Laszczak wrote: >>>>> To avoid duplicate error information patch replaces platform_get_irq_byname >>>>> into platform_get_irq_byname_optional. >>>> >>>> What is duplicate error information? >>> >>> The function platform_get_irq_byname print: >>> " dev_err(&dev->dev, "IRQ %s not found\n", name);" if error occurred. >>> >>> In core.c we have the another error message below invoking this function. >>> e.g >>> if (cdns->dev_irq < 0) >>> dev_err(dev, "couldn't get peripheral irq\n"); >>> >>> So, it's looks like one dev_err is redundant. >> >> If we want all 3 IRQs to be valid irrespective of dr_mode then we should >> use platform_get_irq_byname() and error out in probe if (ret < 0 && ret != -EPROBE_DEFER). >> >> We can get rid of the irq check and duplicate error message in other places. > > To be sure we understand each other correctly. > > Are You suggesting to leave the platform_get_irq_byname() > and rid of from core.c the following lines : > > if (cdns->dev_irq < 0) > dev_err(dev, "couldn't get peripheral irq\n"); > > and > > dev_err(dev, "couldn't get otg irq\n"); > ? Yes. > > A word of explanation why this patch has been sent. > During reviewing the cdnsp driver Chunfeng Yun add such comment: > > " >> + cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >> + if (cdns->dev_irq == -EPROBE_DEFER) >> + return cdns->dev_irq; >> + >> + if (cdns->dev_irq < 0) >> + dev_err(dev, "couldn't get peripheral irq\n"); > Use platform_get_irq_byname_optional? otherwise no need print this log, > platform_get_irq_byname() will print it. > " > > In this patch I've chosen the platform_get_irq_byname_optional because both > function do the same but the error message from core.c tell us little more then > generic message from platform_get_irq_byname. Using platform_get_irq_byname_optional() says driver expects it is optional but only to fail later. It will be confusing to new reader that's all. I leave it to you to decide what approach to take. cheers, -roger >> >>> >>>> >>>>> >>>>> A change was suggested during reviewing CDNSP driver by Chunfeng Yun. >>>>> >>>>> Signed-off-by: Pawel Laszczak <pawell@cadence.com> >>>>> --- >>>>> drivers/usb/cdns3/core.c | 4 ++-- >>>>> 1 file changed, 2 insertions(+), 2 deletions(-) >>>>> >>>>> diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c >>>>> index a0f73d4711ae..a3f6dc44cf3a 100644 >>>>> --- a/drivers/usb/cdns3/core.c >>>>> +++ b/drivers/usb/cdns3/core.c >>>>> @@ -465,7 +465,7 @@ static int cdns3_probe(struct platform_device *pdev) >>>>> >>>>> cdns->xhci_res[1] = *res; >>>>> >>>>> - cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >>>>> + cdns->dev_irq = platform_get_irq_byname_optional(pdev, "peripheral"); >>>> >>>> As per DT binding document, these are mandatory properties >>> >>> I think that name platform_get_irq_byname_optional is little confusing. >>> Function descriptions show that both are almost identical: >>> /** >>> * platform_get_irq_byname_optional - get an optional IRQ for a device by name >>> * @dev: platform device >>> * @name: IRQ name >>> * >>> * Get an optional IRQ by name like platform_get_irq_byname(). Except that it >>> * does not print an error message if an IRQ can not be obtained. >>> * >>> * Return: non-zero IRQ number on success, negative error number on failure. >>> */ >>> >>>> >>>> - interrupts: Interrupts used by cdns3 controller: >>>> "host" - interrupt used by XHCI driver. >>>> "peripheral" - interrupt used by device driver >>>> "otg" - interrupt used by DRD/OTG part of driver >>>> >>>> for dr_mode == "otg" -> all 3 are mandatory. >>>> for dr_mode == "host" -> "otg" and "peripheral" IRQs are not required. >>>> for dr_mode == "periphearal" -> "otg" and "host" IRQs are not required. >>>> >>>>> if (cdns->dev_irq == -EPROBE_DEFER) >>>>> return cdns->dev_irq; >>>>> >>>>> @@ -477,7 +477,7 @@ static int cdns3_probe(struct platform_device *pdev) >>>>> return PTR_ERR(regs); >>>>> cdns->dev_regs = regs; >>>>> >>>>> - cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); >>>>> + cdns->otg_irq = platform_get_irq_byname_optional(pdev, "otg"); >>>>> if (cdns->otg_irq == -EPROBE_DEFER) >>>>> return cdns->otg_irq; >>>>> >>>>> >>>> >>> >>> Regards, >>> Pawel >>> >> >> -- >> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. >> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
Roger, >Pawel, > >On 05/10/2020 08:54, Pawel Laszczak wrote: >> Roger, >>> >>> Pawel, >>> >>> On 02/10/2020 12:08, Pawel Laszczak wrote: >>>> Roger, >>>> >>>>> >>>>> On 30/09/2020 09:57, Pawel Laszczak wrote: >>>>>> To avoid duplicate error information patch replaces platform_get_irq_byname >>>>>> into platform_get_irq_byname_optional. >>>>> >>>>> What is duplicate error information? >>>> >>>> The function platform_get_irq_byname print: >>>> " dev_err(&dev->dev, "IRQ %s not found\n", name);" if error occurred. >>>> >>>> In core.c we have the another error message below invoking this function. >>>> e.g >>>> if (cdns->dev_irq < 0) >>>> dev_err(dev, "couldn't get peripheral irq\n"); >>>> >>>> So, it's looks like one dev_err is redundant. >>> >>> If we want all 3 IRQs to be valid irrespective of dr_mode then we should >>> use platform_get_irq_byname() and error out in probe if (ret < 0 && ret != -EPROBE_DEFER). >>> >>> We can get rid of the irq check and duplicate error message in other places. >> >> To be sure we understand each other correctly. >> >> Are You suggesting to leave the platform_get_irq_byname() >> and rid of from core.c the following lines : >> >> if (cdns->dev_irq < 0) >> dev_err(dev, "couldn't get peripheral irq\n"); >> >> and >> >> dev_err(dev, "couldn't get otg irq\n"); >> ? > >Yes. > >> >> A word of explanation why this patch has been sent. >> During reviewing the cdnsp driver Chunfeng Yun add such comment: >> >> " >>> + cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >>> + if (cdns->dev_irq == -EPROBE_DEFER) >>> + return cdns->dev_irq; >>> + >>> + if (cdns->dev_irq < 0) >>> + dev_err(dev, "couldn't get peripheral irq\n"); >> Use platform_get_irq_byname_optional? otherwise no need print this log, >> platform_get_irq_byname() will print it. >> " >> >> In this patch I've chosen the platform_get_irq_byname_optional because both >> function do the same but the error message from core.c tell us little more then >> generic message from platform_get_irq_byname. > >Using platform_get_irq_byname_optional() says driver expects it is optional but >only to fail later. It will be confusing to new reader that's all. I leave it to >you to decide what approach to take. Thanks for clarification. I will send new patch with platform_get_irq_byname. Cheers, Pawel > >>> >>>> >>>>> >>>>>> >>>>>> A change was suggested during reviewing CDNSP driver by Chunfeng Yun. >>>>>> >>>>>> Signed-off-by: Pawel Laszczak <pawell@cadence.com> >>>>>> --- >>>>>> drivers/usb/cdns3/core.c | 4 ++-- >>>>>> 1 file changed, 2 insertions(+), 2 deletions(-) >>>>>> >>>>>> diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c >>>>>> index a0f73d4711ae..a3f6dc44cf3a 100644 >>>>>> --- a/drivers/usb/cdns3/core.c >>>>>> +++ b/drivers/usb/cdns3/core.c >>>>>> @@ -465,7 +465,7 @@ static int cdns3_probe(struct platform_device *pdev) >>>>>> >>>>>> cdns->xhci_res[1] = *res; >>>>>> >>>>>> - cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >>>>>> + cdns->dev_irq = platform_get_irq_byname_optional(pdev, "peripheral"); >>>>> >>>>> As per DT binding document, these are mandatory properties >>>> >>>> I think that name platform_get_irq_byname_optional is little confusing. >>>> Function descriptions show that both are almost identical: >>>> /** >>>> * platform_get_irq_byname_optional - get an optional IRQ for a device by name >>>> * @dev: platform device >>>> * @name: IRQ name >>>> * >>>> * Get an optional IRQ by name like platform_get_irq_byname(). Except that it >>>> * does not print an error message if an IRQ can not be obtained. >>>> * >>>> * Return: non-zero IRQ number on success, negative error number on failure. >>>> */ >>>> >>>>> >>>>> - interrupts: Interrupts used by cdns3 controller: >>>>> "host" - interrupt used by XHCI driver. >>>>> "peripheral" - interrupt used by device driver >>>>> "otg" - interrupt used by DRD/OTG part of driver >>>>> >>>>> for dr_mode == "otg" -> all 3 are mandatory. >>>>> for dr_mode == "host" -> "otg" and "peripheral" IRQs are not required. >>>>> for dr_mode == "periphearal" -> "otg" and "host" IRQs are not required. >>>>> >>>>>> if (cdns->dev_irq == -EPROBE_DEFER) >>>>>> return cdns->dev_irq; >>>>>> >>>>>> @@ -477,7 +477,7 @@ static int cdns3_probe(struct platform_device *pdev) >>>>>> return PTR_ERR(regs); >>>>>> cdns->dev_regs = regs; >>>>>> >>>>>> - cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); >>>>>> + cdns->otg_irq = platform_get_irq_byname_optional(pdev, "otg"); >>>>>> if (cdns->otg_irq == -EPROBE_DEFER) >>>>>> return cdns->otg_irq; >>>>>> >>>>>> >>>>> >>>> >>>> Regards, >>>> Pawel >>>> >>> >>> -- >>> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. >>> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki > >-- >Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. >Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
Felipe, Please ignore this patch. I will create the new one. It's no sense to send the v2 because I have to change the patch name, Description and contents. Regards, Pawel, >Roger, > >>Pawel, >> >>On 05/10/2020 08:54, Pawel Laszczak wrote: >>> Roger, >>>> >>>> Pawel, >>>> >>>> On 02/10/2020 12:08, Pawel Laszczak wrote: >>>>> Roger, >>>>> >>>>>> >>>>>> On 30/09/2020 09:57, Pawel Laszczak wrote: >>>>>>> To avoid duplicate error information patch replaces platform_get_irq_byname >>>>>>> into platform_get_irq_byname_optional. >>>>>> >>>>>> What is duplicate error information? >>>>> >>>>> The function platform_get_irq_byname print: >>>>> " dev_err(&dev->dev, "IRQ %s not found\n", name);" if error occurred. >>>>> >>>>> In core.c we have the another error message below invoking this function. >>>>> e.g >>>>> if (cdns->dev_irq < 0) >>>>> dev_err(dev, "couldn't get peripheral irq\n"); >>>>> >>>>> So, it's looks like one dev_err is redundant. >>>> >>>> If we want all 3 IRQs to be valid irrespective of dr_mode then we should >>>> use platform_get_irq_byname() and error out in probe if (ret < 0 && ret != -EPROBE_DEFER). >>>> >>>> We can get rid of the irq check and duplicate error message in other places. >>> >>> To be sure we understand each other correctly. >>> >>> Are You suggesting to leave the platform_get_irq_byname() >>> and rid of from core.c the following lines : >>> >>> if (cdns->dev_irq < 0) >>> dev_err(dev, "couldn't get peripheral irq\n"); >>> >>> and >>> >>> dev_err(dev, "couldn't get otg irq\n"); >>> ? >> >>Yes. >> >>> >>> A word of explanation why this patch has been sent. >>> During reviewing the cdnsp driver Chunfeng Yun add such comment: >>> >>> " >>>> + cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >>>> + if (cdns->dev_irq == -EPROBE_DEFER) >>>> + return cdns->dev_irq; >>>> + >>>> + if (cdns->dev_irq < 0) >>>> + dev_err(dev, "couldn't get peripheral irq\n"); >>> Use platform_get_irq_byname_optional? otherwise no need print this log, >>> platform_get_irq_byname() will print it. >>> " >>> >>> In this patch I've chosen the platform_get_irq_byname_optional because both >>> function do the same but the error message from core.c tell us little more then >>> generic message from platform_get_irq_byname. >> >>Using platform_get_irq_byname_optional() says driver expects it is optional but >>only to fail later. It will be confusing to new reader that's all. I leave it to >>you to decide what approach to take. > >Thanks for clarification. >I will send new patch with platform_get_irq_byname. > >Cheers, >Pawel > >> >>>> >>>>> >>>>>> >>>>>>> >>>>>>> A change was suggested during reviewing CDNSP driver by Chunfeng Yun. >>>>>>> >>>>>>> Signed-off-by: Pawel Laszczak <pawell@cadence.com> >>>>>>> --- >>>>>>> drivers/usb/cdns3/core.c | 4 ++-- >>>>>>> 1 file changed, 2 insertions(+), 2 deletions(-) >>>>>>> >>>>>>> diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c >>>>>>> index a0f73d4711ae..a3f6dc44cf3a 100644 >>>>>>> --- a/drivers/usb/cdns3/core.c >>>>>>> +++ b/drivers/usb/cdns3/core.c >>>>>>> @@ -465,7 +465,7 @@ static int cdns3_probe(struct platform_device *pdev) >>>>>>> >>>>>>> cdns->xhci_res[1] = *res; >>>>>>> >>>>>>> - cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); >>>>>>> + cdns->dev_irq = platform_get_irq_byname_optional(pdev, "peripheral"); >>>>>> >>>>>> As per DT binding document, these are mandatory properties >>>>> >>>>> I think that name platform_get_irq_byname_optional is little confusing. >>>>> Function descriptions show that both are almost identical: >>>>> /** >>>>> * platform_get_irq_byname_optional - get an optional IRQ for a device by name >>>>> * @dev: platform device >>>>> * @name: IRQ name >>>>> * >>>>> * Get an optional IRQ by name like platform_get_irq_byname(). Except that it >>>>> * does not print an error message if an IRQ can not be obtained. >>>>> * >>>>> * Return: non-zero IRQ number on success, negative error number on failure. >>>>> */ >>>>> >>>>>> >>>>>> - interrupts: Interrupts used by cdns3 controller: >>>>>> "host" - interrupt used by XHCI driver. >>>>>> "peripheral" - interrupt used by device driver >>>>>> "otg" - interrupt used by DRD/OTG part of driver >>>>>> >>>>>> for dr_mode == "otg" -> all 3 are mandatory. >>>>>> for dr_mode == "host" -> "otg" and "peripheral" IRQs are not required. >>>>>> for dr_mode == "periphearal" -> "otg" and "host" IRQs are not required. >>>>>> >>>>>>> if (cdns->dev_irq == -EPROBE_DEFER) >>>>>>> return cdns->dev_irq; >>>>>>> >>>>>>> @@ -477,7 +477,7 @@ static int cdns3_probe(struct platform_device *pdev) >>>>>>> return PTR_ERR(regs); >>>>>>> cdns->dev_regs = regs; >>>>>>> >>>>>>> - cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); >>>>>>> + cdns->otg_irq = platform_get_irq_byname_optional(pdev, "otg"); >>>>>>> if (cdns->otg_irq == -EPROBE_DEFER) >>>>>>> return cdns->otg_irq; >>>>>>> >>>>>>> >>>>>> >>>>> >>>>> Regards, >>>>> Pawel >>>>> >>>> >>>> -- >>>> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. >>>> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki >> >>-- >>Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. >>Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c index a0f73d4711ae..a3f6dc44cf3a 100644 --- a/drivers/usb/cdns3/core.c +++ b/drivers/usb/cdns3/core.c @@ -465,7 +465,7 @@ static int cdns3_probe(struct platform_device *pdev) cdns->xhci_res[1] = *res; - cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); + cdns->dev_irq = platform_get_irq_byname_optional(pdev, "peripheral"); if (cdns->dev_irq == -EPROBE_DEFER) return cdns->dev_irq; @@ -477,7 +477,7 @@ static int cdns3_probe(struct platform_device *pdev) return PTR_ERR(regs); cdns->dev_regs = regs; - cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); + cdns->otg_irq = platform_get_irq_byname_optional(pdev, "otg"); if (cdns->otg_irq == -EPROBE_DEFER) return cdns->otg_irq;
To avoid duplicate error information patch replaces platform_get_irq_byname into platform_get_irq_byname_optional. A change was suggested during reviewing CDNSP driver by Chunfeng Yun. Signed-off-by: Pawel Laszczak <pawell@cadence.com> --- drivers/usb/cdns3/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)