Re: [PATCH] firmware_class: make firmware caching configurable

[Mark Salyzyn]

On 11/13/19 1:50 PM, Greg Kroah-Hartman wrote:
> On Wed, Nov 13, 2019 at 01:01:13PM -0800, Mark Salyzyn wrote:
> > Because firmware caching generates uevent messages that are sent over
> > a netlink socket, it can prevent suspend on many platforms.  It's
> > also not always useful, so make it a configurable option.
> >
> > Signed-off-by: Mark Salyzyn <salyzyn@xxxxxxxxxxx>
> > Cc: Tim Murray <timmurray@xxxxxxxxxx>
> > Cc: Venkata Narendra Kumar Gutta <vnkgutta@xxxxxxxxxxxxxx>
> > Acked-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
> > ---
> >   drivers/base/Kconfig                | 13 +++++++++++++
> >   drivers/base/firmware_loader/main.c |  6 +++---
> >   2 files changed, 16 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
> > index 28b92e3cc570..36351c3a62b0 100644
> > --- a/drivers/base/Kconfig
> > +++ b/drivers/base/Kconfig
> > @@ -89,6 +89,19 @@ config PREVENT_FIRMWARE_BUILD
> >   
> >   source "drivers/base/firmware_loader/Kconfig"
> >   
> > +config FW_CACHE
> > +	bool "Enable firmware caching during suspend"
> > +	depends on PM_SLEEP
> > +	default y
> > +	help
> > +	  Because firmware caching generates uevent messages that are sent
> > +	  over a netlink socket, it can prevent suspend on many platforms.
> > +	  It is also not always useful, so on such platforms we have the
> > +	  option.
> > +
> > +	  If unsure, say Y.
> > +
> > +
> Shouldn't this entry go into drivers/base/firmware_loader/Kconfig
> instead and depend on FW_LOADER by putting it in the correct location in
> that file?

Good point, respin on its way.

> Also, no need for two blank lines.
<not sure how the double lines showed up, checkpatch,pl should look for 
this>
> And finally, 'default y' is only a good idea if your machine can not
> boot without the option.  I don't think that's the case here, correct?
>
> thanks,
>
> greg k-h

I am concerned about the change in user space behavior and to prevent 
defconfig churn.