[PATCH] serial: max310x: add comments for membase address workaround

[PATCH] serial: max310x: add comments for membase address workaround

[Hugo Villeneuve]

From: Hugo Villeneuve <hvilleneuve@dimonoff.com>

Add comments about workaround used to configure membase address. This
follows suggestions made during review of a sc16is7xx driver patch to
add the same workaround.

Link: https://lore.kernel.org/lkml/2936e18f-44ea-faed-9fa0-2ddefe7c3194@linux.intel.com
Link: https://lore.kernel.org/lkml/20230801131655.80bd8f97f018dda6155d65f6@hugovil.com/
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
---
 drivers/tty/serial/max310x.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 416d553b73a7..5903dd033fd0 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1369,6 +1369,11 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty
 		s->p[i].port.flags	= UPF_FIXED_TYPE | UPF_LOW_LATENCY;
 		s->p[i].port.iotype	= UPIO_PORT;
 		s->p[i].port.iobase	= i;
+		/*
+		 * Use all ones as membase to make sure uart_configure_port() in
+		 * serial_core.c does not abort for SPI/I2C devices where the
+		 * membase address is not applicable.
+		 */
 		s->p[i].port.membase	= (void __iomem *)~0;
 		s->p[i].port.uartclk	= uartclk;
 		s->p[i].port.rs485_config = max310x_rs485_config;

base-commit: 426263d5fb400ccde5444748693dc75bda18f01e
-- 
2.30.2

Re: [PATCH] serial: max310x: add comments for membase address workaround

[Greg Kroah-Hartman]

On Thu, Aug 03, 2023 at 10:05:51AM -0400, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> 
> Add comments about workaround used to configure membase address. This
> follows suggestions made during review of a sc16is7xx driver patch to
> add the same workaround.
> 
> Link: https://lore.kernel.org/lkml/2936e18f-44ea-faed-9fa0-2ddefe7c3194@linux.intel.com
> Link: https://lore.kernel.org/lkml/20230801131655.80bd8f97f018dda6155d65f6@hugovil.com/
> Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> ---
>  drivers/tty/serial/max310x.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
> index 416d553b73a7..5903dd033fd0 100644
> --- a/drivers/tty/serial/max310x.c
> +++ b/drivers/tty/serial/max310x.c
> @@ -1369,6 +1369,11 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty
>  		s->p[i].port.flags	= UPF_FIXED_TYPE | UPF_LOW_LATENCY;
>  		s->p[i].port.iotype	= UPIO_PORT;
>  		s->p[i].port.iobase	= i;
> +		/*
> +		 * Use all ones as membase to make sure uart_configure_port() in
> +		 * serial_core.c does not abort for SPI/I2C devices where the
> +		 * membase address is not applicable.
> +		 */
>  		s->p[i].port.membase	= (void __iomem *)~0;
>  		s->p[i].port.uartclk	= uartclk;
>  		s->p[i].port.rs485_config = max310x_rs485_config;
> 
> base-commit: 426263d5fb400ccde5444748693dc75bda18f01e
> -- 
> 2.30.2
> 

Meta-comment, your email system is not correct and is not able to be
verified as I get the following when attempting to apply your patch:

---
  ✗ [PATCH] serial: max310x: add comments for membase address workaround
  ---
  ✗ BADSIG: DKIM/hugovil.com

Please fix up for future submissions.

thanks,

greg k-h

Re: [PATCH] serial: max310x: add comments for membase address workaround

[Hugo Villeneuve]

On Fri, 4 Aug 2023 15:07:50 +0200
Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:

> On Thu, Aug 03, 2023 at 10:05:51AM -0400, Hugo Villeneuve wrote:
> > From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > 
> > Add comments about workaround used to configure membase address. This
> > follows suggestions made during review of a sc16is7xx driver patch to
> > add the same workaround.
> > 
> > Link: https://lore.kernel.org/lkml/2936e18f-44ea-faed-9fa0-2ddefe7c3194@linux.intel.com
> > Link: https://lore.kernel.org/lkml/20230801131655.80bd8f97f018dda6155d65f6@hugovil.com/
> > Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > ---
> >  drivers/tty/serial/max310x.c | 5 +++++
> >  1 file changed, 5 insertions(+)
> > 
> > diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
> > index 416d553b73a7..5903dd033fd0 100644
> > --- a/drivers/tty/serial/max310x.c
> > +++ b/drivers/tty/serial/max310x.c
> > @@ -1369,6 +1369,11 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty
> >  		s->p[i].port.flags	= UPF_FIXED_TYPE | UPF_LOW_LATENCY;
> >  		s->p[i].port.iotype	= UPIO_PORT;
> >  		s->p[i].port.iobase	= i;
> > +		/*
> > +		 * Use all ones as membase to make sure uart_configure_port() in
> > +		 * serial_core.c does not abort for SPI/I2C devices where the
> > +		 * membase address is not applicable.
> > +		 */
> >  		s->p[i].port.membase	= (void __iomem *)~0;
> >  		s->p[i].port.uartclk	= uartclk;
> >  		s->p[i].port.rs485_config = max310x_rs485_config;
> > 
> > base-commit: 426263d5fb400ccde5444748693dc75bda18f01e
> > -- 
> > 2.30.2
> > 
> 
> Meta-comment, your email system is not correct and is not able to be
> verified as I get the following when attempting to apply your patch:
> 
> ---
>   ✗ [PATCH] serial: max310x: add comments for membase address workaround
>   ---
>   ✗ BADSIG: DKIM/hugovil.com
> 
> Please fix up for future submissions.
> 
> thanks,
> 
> greg k-h

Hi Greg,
I will look into it. Thank you.

Hugo.

Re: [PATCH] serial: max310x: add comments for membase address workaround

[Hugo Villeneuve]

On Fri, 4 Aug 2023 10:17:22 -0400
Hugo Villeneuve <hugo@hugovil.com> wrote:

> On Fri, 4 Aug 2023 15:07:50 +0200
> Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
> 
> > On Thu, Aug 03, 2023 at 10:05:51AM -0400, Hugo Villeneuve wrote:
> > > From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > > 
> > > Add comments about workaround used to configure membase address. This
> > > follows suggestions made during review of a sc16is7xx driver patch to
> > > add the same workaround.
> > > 
> > > Link: https://lore.kernel.org/lkml/2936e18f-44ea-faed-9fa0-2ddefe7c3194@linux.intel.com
> > > Link: https://lore.kernel.org/lkml/20230801131655.80bd8f97f018dda6155d65f6@hugovil.com/
> > > Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > > ---
> > >  drivers/tty/serial/max310x.c | 5 +++++
> > >  1 file changed, 5 insertions(+)
> > > 
> > > diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
> > > index 416d553b73a7..5903dd033fd0 100644
> > > --- a/drivers/tty/serial/max310x.c
> > > +++ b/drivers/tty/serial/max310x.c
> > > @@ -1369,6 +1369,11 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty
> > >  		s->p[i].port.flags	= UPF_FIXED_TYPE | UPF_LOW_LATENCY;
> > >  		s->p[i].port.iotype	= UPIO_PORT;
> > >  		s->p[i].port.iobase	= i;
> > > +		/*
> > > +		 * Use all ones as membase to make sure uart_configure_port() in
> > > +		 * serial_core.c does not abort for SPI/I2C devices where the
> > > +		 * membase address is not applicable.
> > > +		 */
> > >  		s->p[i].port.membase	= (void __iomem *)~0;
> > >  		s->p[i].port.uartclk	= uartclk;
> > >  		s->p[i].port.rs485_config = max310x_rs485_config;
> > > 
> > > base-commit: 426263d5fb400ccde5444748693dc75bda18f01e
> > > -- 
> > > 2.30.2
> > > 
> > 
> > Meta-comment, your email system is not correct and is not able to be
> > verified as I get the following when attempting to apply your patch:
> > 
> > ---
> >   ✗ [PATCH] serial: max310x: add comments for membase address workaround
> >   ---
> >   ✗ BADSIG: DKIM/hugovil.com
> > 
> > Please fix up for future submissions.
> > 
> > thanks,
> > 
> > greg k-h
> 
> Hi Greg,
> I will look into it. Thank you.

Hi Greg,
I double-checked my DKIM setup, but everything looks fine. If I send
emails to gmail or outlook servers, they both report "DKIM
signature=pass", and I also checked with an online DKIM validation
service and it is also ok.

What tool are you using to check the DKIM signature?

Thank you,
Hugo.

Re: [PATCH] serial: max310x: add comments for membase address workaround

[Greg Kroah-Hartman]

On Mon, Aug 07, 2023 at 11:24:41AM -0400, Hugo Villeneuve wrote:
> On Fri, 4 Aug 2023 10:17:22 -0400
> Hugo Villeneuve <hugo@hugovil.com> wrote:
> 
> > On Fri, 4 Aug 2023 15:07:50 +0200
> > Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
> > 
> > > On Thu, Aug 03, 2023 at 10:05:51AM -0400, Hugo Villeneuve wrote:
> > > > From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > > > 
> > > > Add comments about workaround used to configure membase address. This
> > > > follows suggestions made during review of a sc16is7xx driver patch to
> > > > add the same workaround.
> > > > 
> > > > Link: https://lore.kernel.org/lkml/2936e18f-44ea-faed-9fa0-2ddefe7c3194@linux.intel.com
> > > > Link: https://lore.kernel.org/lkml/20230801131655.80bd8f97f018dda6155d65f6@hugovil.com/
> > > > Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > > > ---
> > > >  drivers/tty/serial/max310x.c | 5 +++++
> > > >  1 file changed, 5 insertions(+)
> > > > 
> > > > diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
> > > > index 416d553b73a7..5903dd033fd0 100644
> > > > --- a/drivers/tty/serial/max310x.c
> > > > +++ b/drivers/tty/serial/max310x.c
> > > > @@ -1369,6 +1369,11 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty
> > > >  		s->p[i].port.flags	= UPF_FIXED_TYPE | UPF_LOW_LATENCY;
> > > >  		s->p[i].port.iotype	= UPIO_PORT;
> > > >  		s->p[i].port.iobase	= i;
> > > > +		/*
> > > > +		 * Use all ones as membase to make sure uart_configure_port() in
> > > > +		 * serial_core.c does not abort for SPI/I2C devices where the
> > > > +		 * membase address is not applicable.
> > > > +		 */
> > > >  		s->p[i].port.membase	= (void __iomem *)~0;
> > > >  		s->p[i].port.uartclk	= uartclk;
> > > >  		s->p[i].port.rs485_config = max310x_rs485_config;
> > > > 
> > > > base-commit: 426263d5fb400ccde5444748693dc75bda18f01e
> > > > -- 
> > > > 2.30.2
> > > > 
> > > 
> > > Meta-comment, your email system is not correct and is not able to be
> > > verified as I get the following when attempting to apply your patch:
> > > 
> > > ---
> > >   ✗ [PATCH] serial: max310x: add comments for membase address workaround
> > >   ---
> > >   ✗ BADSIG: DKIM/hugovil.com
> > > 
> > > Please fix up for future submissions.
> > > 
> > > thanks,
> > > 
> > > greg k-h
> > 
> > Hi Greg,
> > I will look into it. Thank you.
> 
> Hi Greg,
> I double-checked my DKIM setup, but everything looks fine. If I send
> emails to gmail or outlook servers, they both report "DKIM
> signature=pass", and I also checked with an online DKIM validation
> service and it is also ok.
> 
> What tool are you using to check the DKIM signature?

The patatt tool as part of `b4`.  I just checked, your direct email to
me here passes, BUT the message you sent to the mailing list did not.
Check it out yourself, look at the message on lore.kernel.org for this
response and see if that passes the DKIM check or not.

thanks,

greg k-h

Re: [PATCH] serial: max310x: add comments for membase address workaround

[Hugo Villeneuve]

On Mon, 7 Aug 2023 17:27:38 +0200
Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:

> On Mon, Aug 07, 2023 at 11:24:41AM -0400, Hugo Villeneuve wrote:
> > On Fri, 4 Aug 2023 10:17:22 -0400
> > Hugo Villeneuve <hugo@hugovil.com> wrote:
> > 
> > > On Fri, 4 Aug 2023 15:07:50 +0200
> > > Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
> > > 
> > > > On Thu, Aug 03, 2023 at 10:05:51AM -0400, Hugo Villeneuve wrote:
> > > > > From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > > > > 
> > > > > Add comments about workaround used to configure membase address. This
> > > > > follows suggestions made during review of a sc16is7xx driver patch to
> > > > > add the same workaround.
> > > > > 
> > > > > Link: https://lore.kernel.org/lkml/2936e18f-44ea-faed-9fa0-2ddefe7c3194@linux.intel.com
> > > > > Link: https://lore.kernel.org/lkml/20230801131655.80bd8f97f018dda6155d65f6@hugovil.com/
> > > > > Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
> > > > > ---
> > > > >  drivers/tty/serial/max310x.c | 5 +++++
> > > > >  1 file changed, 5 insertions(+)
> > > > > 
> > > > > diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
> > > > > index 416d553b73a7..5903dd033fd0 100644
> > > > > --- a/drivers/tty/serial/max310x.c
> > > > > +++ b/drivers/tty/serial/max310x.c
> > > > > @@ -1369,6 +1369,11 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty
> > > > >  		s->p[i].port.flags	= UPF_FIXED_TYPE | UPF_LOW_LATENCY;
> > > > >  		s->p[i].port.iotype	= UPIO_PORT;
> > > > >  		s->p[i].port.iobase	= i;
> > > > > +		/*
> > > > > +		 * Use all ones as membase to make sure uart_configure_port() in
> > > > > +		 * serial_core.c does not abort for SPI/I2C devices where the
> > > > > +		 * membase address is not applicable.
> > > > > +		 */
> > > > >  		s->p[i].port.membase	= (void __iomem *)~0;
> > > > >  		s->p[i].port.uartclk	= uartclk;
> > > > >  		s->p[i].port.rs485_config = max310x_rs485_config;
> > > > > 
> > > > > base-commit: 426263d5fb400ccde5444748693dc75bda18f01e
> > > > > -- 
> > > > > 2.30.2
> > > > > 
> > > > 
> > > > Meta-comment, your email system is not correct and is not able to be
> > > > verified as I get the following when attempting to apply your patch:
> > > > 
> > > > ---
> > > >   ✗ [PATCH] serial: max310x: add comments for membase address workaround
> > > >   ---
> > > >   ✗ BADSIG: DKIM/hugovil.com
> > > > 
> > > > Please fix up for future submissions.
> > > > 
> > > > thanks,
> > > > 
> > > > greg k-h
> > > 
> > > Hi Greg,
> > > I will look into it. Thank you.
> > 
> > Hi Greg,
> > I double-checked my DKIM setup, but everything looks fine. If I send
> > emails to gmail or outlook servers, they both report "DKIM
> > signature=pass", and I also checked with an online DKIM validation
> > service and it is also ok.
> > 
> > What tool are you using to check the DKIM signature?
> 
> The patatt tool as part of `b4`.  I just checked, your direct email to
> me here passes, BUT the message you sent to the mailing list did not.
> Check it out yourself, look at the message on lore.kernel.org for this
> response and see if that passes the DKIM check or not.

Hi Greg,
if I look on lore.kernel.org for this response, here it is:

    https://lore.kernel.org/all/2023080738-headcount-jigsaw-efb7@gregkh/raw

If I save this raw message and run it thru patatt, I get:

$ patatt validate test-lore.kernel.mail
 NOSIG | Re: [PATCH] serial: max310x: add comments for membase address
 workaround
       | no signatures found

But if I use another tool, dkimverify (from dkimpy), then it works ok:

$ dkimverify < test-lore.kernel.mail 
signature ok

and if I check the original patch:

    https://lore.kernel.org/all/20230803140551.970141-1-hugo@hugovil.com/raw

I also get a similar failure like you did:

$ dkimverify < test-lore.kernel-original-patch.mail
signature verification failed

The only difference between the two is that the original patch was sent
using 'git send-email'. But in the end, both messages passed thru the
same server (my mail server) running Exim4 v4.92 on a Debian box.

I found that by modifying my Exim configuration and adding the
following (simpler configuration) seems to solve the problem with 'git
send-email' and DKIM:

---------------
DKIM_SIGN_HEADERS =
content-transfer-encoding:mime-version:message-id:date:subject:to:from:cc:subject:date:message-id:reply-to
---------------

I am not an expert in Exim, and I am not sure this is the most
elegant solution, but hope this can help others...

Thank you,
Hugo.