linux-kernel - Re: [PATCH 1/6] GenWQE PCI support, health monitoring and recovery

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Date:	Tue, 03 Dec 2013 14:49:41 +0100
From:	Frank Haverkamp <haver@...ux.vnet.ibm.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, arnd@...db.de,
	cody@...ux.vnet.ibm.com, schwidefsky@...ibm.com,
	utz.bacher@...ibm.com, mmarek@...e.cz, rmallon@...il.com,
	jsvogt@...ibm.com, MIJUNG@...ibm.com, cascardo@...ux.vnet.ibm.com,
	michael@...ra.de
Subject: Re: [PATCH 1/6] GenWQE PCI support, health monitoring and recovery

Hi Greg,

Am Mittwoch, den 27.11.2013, 11:20 -0800 schrieb Greg KH:
> On Wed, Nov 06, 2013 at 01:45:38PM +0100, Frank Haverkamp wrote:
> > +/*
> > + * Flags for extended output (dbg_print)
> > + *   We define different levels of debugging for the appropriate unit.
> > + */
> > +#define dbg_card			0x00000001
> > +#define dbg_card_ddcb			0x00000004
> > +#define dbg_card_regs			0x00000008
> > +#define dbg_card_sglist			0x00000400
> > +#define dbg_card_pinning		0x00000800
> > +
> > +#define genwqe_dprintk(_cd, dbg_unit, fmt, ...) do {			\
> > +		struct genwqe_dev *__cd = (_cd);			\
> > +		if ((_cd)->debug & (dbg_unit))				\
> > +			dev_info(&__cd->pci_dev->dev, fmt,		\
> > +				 ## __VA_ARGS__);			\
> > +	} while (0)
> 
> Ugh, really?  How is a debugging printk being sent out with dev_info()?
> 
> And why not just use dynamic kernel debugging and not create your own
> masks and macros?  We are trying to make everything use the same
> infrastructure, please don't create new ones for every individual driver
> in the kernel, that's a mess.

I removed the genwqe_dprintk function completely. Our debug flag I kept
for the moment, because I like to use the kernel hexdump functions to
print my control blocks for debugging:

      if (cd->debug & dbg_card_ddcb) {
             dev_dbg(&pci_dev->dev, "FINISHED DDCB#%d\n", req->num);
             genwqe_hexdump(pci_dev, pddcb, sizeof(*pddcb));
      }

Or is there something allowing me to do those hexdumps with the
dynamic_debug feature too? dynamic_hex_dump() looks like what I want.
So let me try to use that and get rid of my own debug support.

> 
> thanks,
> 
> greg k-h
> 

Regards

Frank



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