linux-kernel - Re: [PATCH v2] efi, x86: Add a "debug" option to the efi= cmdline

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Date:	Fri, 6 Feb 2015 01:00:12 -0500
From:	Parmeshwr Prasad <parmeshwr_prasad@...l.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Matt Fleming <matt@...sole-pimps.org>,
	Dave Young <dyoung@...hat.com>,
	Jon Masters <jonathan@...masters.org>,
	Laszlo Ersek <lersek@...hat.com>,
	linux-efi <linux-efi@...r.kernel.org>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Matt Fleming <matt.fleming@...el.com>,
	Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] efi, x86: Add a "debug" option to the efi= cmdline

On Thu, Feb 05, 2015 at 08:28:58AM -0600, Borislav Petkov wrote:
> On Thu, Feb 05, 2015 at 07:45:10AM -0500, Parmeshwr Prasad wrote:
> > It is better if we add some printk from efifb messages.
> > Please review the below patch.
> 
> First of all, we saw you patch.
> 
> Then,
> 
> > From 7fbac896ab87f1b37646ac2f49bb8216ec330642 Mon Sep 17 00:00:00 2001
> > From: Parmeshwr Prasad <parmeshwr_prasad@...l.com>
> > Date: Wed, 4 Feb 2015 06:50:32 -0500
> > Subject: [PATCH] efi, x86: Add a debug option to the efi= cmdline
> 
> yours has the same Subject as mine. This is not how we do patches.
> Consult Documentation/SubmittingPatches about how to do them properly.
> 
> What is more, your patch doesn't have a commit message. But it needs one.
> 
> Fix all that, send it as a *separate* patch after mine has been applied
> and people will take a look then.

I am really sorry that I could not mentioned for what purpose this patch is .
I wanted this patch to be included along with your patch.  As your patch is 
To add “debug” cmdline in efi=”<option>”.

There are some messages in efifb which appears while booting. I thought of
Putting that messages under efi=”debug” cmdline. When efi=debug is given 
Then only efifb messages should appear.

> 
> > 
> > Signed-off-by: Parmeshwr Prasad <parmeshwr_prasad@...l.com>
> > ---
> >  drivers/video/fbdev/efifb.c | 49 +++++++++++++++++++++++++--------------------
> >  1 file changed, 27 insertions(+), 22 deletions(-)
> > 
> > diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
> > index 4bfff34..505bc56 100644
> > --- a/drivers/video/fbdev/efifb.c
> > +++ b/drivers/video/fbdev/efifb.c
> > @@ -145,7 +145,8 @@ static int efifb_probe(struct platform_device *dev)
> >                 printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
> >                 return -ENODEV;
> >         }
> > -       printk(KERN_INFO "efifb: probing for efifb\n");
> > +       if (efi_enabled(EFI_DBG))
> > +               printk(KERN_INFO "efifb: probing for efifb\n");
> 
> If we're going to use the "efifb" prefix, change those to pr_info and
> define pr_fmt - lotsa examples in the kernel sources.
> 
> More importantly, you'd need a consensus from people that the printks in
> efifb are really not interesting and should be behind efi=debug.
> 
> HTH.
> 
> -- 
> Regards/Gruss,
>     Boris.
> 
> ECO tip #101: Trim your mails when you reply.
> --
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