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Commit 97ef062b authored by Bjorn Helgaas's avatar Bjorn Helgaas Committed by Len Brown
Browse files

PNP: add CONFIG_PNP_DEBUG_MESSAGES and pnp_dbg() 



This adds the core function pnp_dbg() and a new config option to
enable it.

The PNP core debugging messages can be enabled at boot-time with the
"pnp.debug" kernel parameter.

Signed-off-by: default avatarBjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 2663f60d

Documentation/kernel-parameters.txt

+4 −0
Original line number Diff line number Diff line
@@ -1660,6 +1660,10 @@ and is between 256 and 4096 characters. It is defined in the file 
			Override pmtimer IOPort with a hex value.

			e.g. pmtmr=0x508



	pnp.debug	[PNP]

			Enable PNP debug messages.  This depends on the

			CONFIG_PNP_DEBUG_MESSAGES option.



	pnpacpi=	[ACPI]

			{ off }

drivers/pnp/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -20,6 +20,20 @@ menuconfig PNP 


	  If unsure, say Y.



config PNP_DEBUG_MESSAGES

	default y

	bool "PNP debugging messages"

	depends on PNP

	help

	  Say Y here if you want the PNP layer to be able to produce debugging

	  messages if needed.  The messages can be enabled at boot-time with

	  the pnp.debug kernel parameter.



	  This option allows you to save a bit of space if you do not want

	  the messages to even be built into the kernel.



	  If you have any doubts about this, say Y here.



if PNP



config PNP_DEBUG

drivers/pnp/base.h

+10 −0
Original line number Diff line number Diff line
@@ -166,3 +166,13 @@ struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev, 
struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,

					  resource_size_t start,

					  resource_size_t end, int flags);



extern int pnp_debug;



#if defined(CONFIG_PNP_DEBUG_MESSAGES)

#define pnp_dbg(dev, format, arg...)					\

	({ if (pnp_debug) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; })

#else

#define pnp_dbg(dev, format, arg...)					\

	({ if (0) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; })

#endif

drivers/pnp/core.c

+11 −0
Original line number Diff line number Diff line
@@ -221,3 +221,14 @@ static int __init pnp_init(void) 
}



subsys_initcall(pnp_init);



int pnp_debug;



#if defined(CONFIG_PNP_DEBUG_MESSAGES)

static int __init pnp_debug_setup(char *__unused)

{

	pnp_debug = 1;

	return 1;

}

__setup("pnp.debug", pnp_debug_setup);

#endif