[PATCH] PCI: dwc: dra7xx: add back CONFIG_PCI dependency for endpoint

[PATCH] PCI: dwc: dra7xx: add back CONFIG_PCI dependency for endpoint

[Arnd Bergmann]

It was a nice idea to split out the PCI host and endpoint mode configuration
into separate options. Unfortunately it doesn't build:

drivers/pci/dwc/pci-dra7xx.c:229:11: error: 'pci_irqd_intx_xlate' undeclared here (not in a function)

This is certainly a fixable problem, but since it's clear that this
configuration was never tested, let's maybe revert back to the
dependency for now, until it can be done in a way that works
better.

Fixes: b052835c6385 ("PCI: dwc: dra7xx: Refactor Kconfig and Makefile handling for host/ep mode")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/pci/dwc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/dwc/Kconfig b/drivers/pci/dwc/Kconfig
index 0fb96c7754de..540419527a92 100644
--- a/drivers/pci/dwc/Kconfig
+++ b/drivers/pci/dwc/Kconfig
@@ -36,7 +36,7 @@ config PCI_DRA7XX_HOST
 config PCI_DRA7XX_EP
 	bool "TI DRA7xx PCIe controller Endpoint Mode"
 	depends on SOC_DRA7XX || COMPILE_TEST
-	depends on PCI_ENDPOINT
+	depends on PCI && PCI_ENDPOINT
 	depends on OF && HAS_IOMEM && TI_PIPE3
 	select PCIE_DW_EP
 	select PCI_DRA7XX
-- 
2.9.0

Re: [PATCH] PCI: dwc: dra7xx: add back CONFIG_PCI dependency for endpoint

[Lorenzo Pieralisi]

On Thu, Jan 18, 2018 at 02:15:54PM +0100, Arnd Bergmann wrote:
> It was a nice idea to split out the PCI host and endpoint mode configuration
> into separate options. Unfortunately it doesn't build:
> 
> drivers/pci/dwc/pci-dra7xx.c:229:11: error: 'pci_irqd_intx_xlate' undeclared here (not in a function)

It is two series tripping over each others in my pci/dwc branch and the
kbuild bot did not manage to test the merged result with a config that
fails - so here we go.

Niklas, Vignesh, Kishon, is this the way you want to get this fixed ?

Otherwise please send a patch asap on top of my pci/dwc branch.

Thanks,
Lorenzo

> This is certainly a fixable problem, but since it's clear that this
> configuration was never tested, let's maybe revert back to the
> dependency for now, until it can be done in a way that works
> better.
> 
> Fixes: b052835c6385 ("PCI: dwc: dra7xx: Refactor Kconfig and Makefile handling for host/ep mode")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/pci/dwc/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/dwc/Kconfig b/drivers/pci/dwc/Kconfig
> index 0fb96c7754de..540419527a92 100644
> --- a/drivers/pci/dwc/Kconfig
> +++ b/drivers/pci/dwc/Kconfig
> @@ -36,7 +36,7 @@ config PCI_DRA7XX_HOST
>  config PCI_DRA7XX_EP
>  	bool "TI DRA7xx PCIe controller Endpoint Mode"
>  	depends on SOC_DRA7XX || COMPILE_TEST
> -	depends on PCI_ENDPOINT
> +	depends on PCI && PCI_ENDPOINT
>  	depends on OF && HAS_IOMEM && TI_PIPE3
>  	select PCIE_DW_EP
>  	select PCI_DRA7XX
> -- 
> 2.9.0
> 

Re: [PATCH] PCI: dwc: dra7xx: add back CONFIG_PCI dependency for endpoint

[Niklas Cassel]

On Thu, Jan 18, 2018 at 02:15:54PM +0100, Arnd Bergmann wrote:
> It was a nice idea to split out the PCI host and endpoint mode configuration
> into separate options. Unfortunately it doesn't build:
> 
> drivers/pci/dwc/pci-dra7xx.c:229:11: error: 'pci_irqd_intx_xlate' undeclared here (not in a function)
> 
> This is certainly a fixable problem, but since it's clear that this
> configuration was never tested, let's maybe revert back to the
> dependency for now, until it can be done in a way that works
> better.

Hello Arnd,

That is not true :( I did test..

git checkout b052835c6385
disable CONFIG_PCI
make
works like a charm :P

Commit 524d59f6e30a ("PCI: dra7xx: Fix legacy INTD IRQ handling"),
which was merged after my commit, added a dependency towards
pci_irqd_intx_xlate.

It might be a bit unfortunately that commit 489f8fe6aa71
("PCI: dwc: dra7xx: Help compiler to remove unused code"),
a commit that you helped me with Arnd, was placed after
b052835c6385 ("PCI: dwc: dra7xx: Refactor Kconfig and Makefile
handling for host/ep mode") instead of before, in my patch
series order.

However, since pci_irqd_intx_xlate is only defined inside
CONFIG_PCI, even 489f8fe6aa71 will not help.

Not completely sure about this, but perhaps a better fix is:

+++ b/include/linux/pci.h
@@ -1686,6 +1686,12 @@ static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
 #define dev_is_pf(d) (false)
 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
 { return false; }
+static inline int pci_irqd_intx_xlate(struct irq_domain *d,
+                                     struct device_node *node,
+                                     const u32 *intspec,
+                                     unsigned int intsize,
+                                     unsigned long *out_hwirq,
+                                     unsigned int *out_type) { return 0; }
 #endif /* CONFIG_PCI */
 
 /* Include architecture-dependent settings and functions */


And a 'Fixes:' tag that references 524d59f6e30a

Regards,
Niklas

> 
> Fixes: b052835c6385 ("PCI: dwc: dra7xx: Refactor Kconfig and Makefile handling for host/ep mode")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/pci/dwc/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/dwc/Kconfig b/drivers/pci/dwc/Kconfig
> index 0fb96c7754de..540419527a92 100644
> --- a/drivers/pci/dwc/Kconfig
> +++ b/drivers/pci/dwc/Kconfig
> @@ -36,7 +36,7 @@ config PCI_DRA7XX_HOST
>  config PCI_DRA7XX_EP
>  	bool "TI DRA7xx PCIe controller Endpoint Mode"
>  	depends on SOC_DRA7XX || COMPILE_TEST
> -	depends on PCI_ENDPOINT
> +	depends on PCI && PCI_ENDPOINT
>  	depends on OF && HAS_IOMEM && TI_PIPE3
>  	select PCIE_DW_EP
>  	select PCI_DRA7XX
> -- 
> 2.9.0
> 

Re: [PATCH] PCI: dwc: dra7xx: add back CONFIG_PCI dependency for endpoint

[Arnd Bergmann]

On Thu, Jan 18, 2018 at 4:03 PM, Niklas Cassel <niklas.cassel@axis.com> wrote:
> On Thu, Jan 18, 2018 at 02:15:54PM +0100, Arnd Bergmann wrote:
>> It was a nice idea to split out the PCI host and endpoint mode configuration
>> into separate options. Unfortunately it doesn't build:
>>
>> drivers/pci/dwc/pci-dra7xx.c:229:11: error: 'pci_irqd_intx_xlate' undeclared here (not in a function)
>>
>> This is certainly a fixable problem, but since it's clear that this
>> configuration was never tested, let's maybe revert back to the
>> dependency for now, until it can be done in a way that works
>> better.
>
> Hello Arnd,
>
> That is not true :( I did test..
>
> git checkout b052835c6385
> disable CONFIG_PCI
> make
> works like a charm :P

Right, I see it now, sorry for the accusation ;-)

> Commit 524d59f6e30a ("PCI: dra7xx: Fix legacy INTD IRQ handling"),
> which was merged after my commit, added a dependency towards
> pci_irqd_intx_xlate.
>
> It might be a bit unfortunately that commit 489f8fe6aa71
> ("PCI: dwc: dra7xx: Help compiler to remove unused code"),
> a commit that you helped me with Arnd, was placed after
> b052835c6385 ("PCI: dwc: dra7xx: Refactor Kconfig and Makefile
> handling for host/ep mode") instead of before, in my patch
> series order.

I have a vague memory of that, yes.

> However, since pci_irqd_intx_xlate is only defined inside
> CONFIG_PCI, even 489f8fe6aa71 will not help.
>
> Not completely sure about this, but perhaps a better fix is:
>
> +++ b/include/linux/pci.h
> @@ -1686,6 +1686,12 @@ static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
>  #define dev_is_pf(d) (false)
>  static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
>  { return false; }
> +static inline int pci_irqd_intx_xlate(struct irq_domain *d,
> +                                     struct device_node *node,
> +                                     const u32 *intspec,
> +                                     unsigned int intsize,
> +                                     unsigned long *out_hwirq,
> +                                     unsigned int *out_type) { return 0; }
>  #endif /* CONFIG_PCI */
>
>  /* Include architecture-dependent settings and functions */
>
>
> And a 'Fixes:' tag that references 524d59f6e30a

Looks fine to me, but I'd put the '{ return 0; }' in a new line for consistency
with the other functions here, and maybe return -EINVAL instead of
zero.

Can you submit that as a proper patch and add my

Acked-by: Arnd Bergmann <arnd@arndb.de>

?

Thanks!


       Arnd

Re: [PATCH] PCI: dwc: dra7xx: add back CONFIG_PCI dependency for endpoint

[Lorenzo Pieralisi]

On Thu, Jan 18, 2018 at 05:39:02PM +0100, Arnd Bergmann wrote:

[...]

> > However, since pci_irqd_intx_xlate is only defined inside
> > CONFIG_PCI, even 489f8fe6aa71 will not help.
> >
> > Not completely sure about this, but perhaps a better fix is:
> >
> > +++ b/include/linux/pci.h
> > @@ -1686,6 +1686,12 @@ static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
> >  #define dev_is_pf(d) (false)
> >  static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
> >  { return false; }
> > +static inline int pci_irqd_intx_xlate(struct irq_domain *d,
> > +                                     struct device_node *node,
> > +                                     const u32 *intspec,
> > +                                     unsigned int intsize,
> > +                                     unsigned long *out_hwirq,
> > +                                     unsigned int *out_type) { return 0; }
> >  #endif /* CONFIG_PCI */
> >
> >  /* Include architecture-dependent settings and functions */
> >
> >
> > And a 'Fixes:' tag that references 524d59f6e30a
> 
> Looks fine to me, but I'd put the '{ return 0; }' in a new line for consistency
> with the other functions here, and maybe return -EINVAL instead of
> zero.
> 
> Can you submit that as a proper patch and add my
> 
> Acked-by: Arnd Bergmann <arnd@arndb.de>

You can add my:

Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

too but I am a bit dubious about the Fixes: tag (it will be merged via
a separate branch and I do not think we really need it), I would omit it.

Please send it as soon as possible or I can do it, please let me
know.

Thanks,
Lorenzo