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Commit ab4ba3cd authored by Thomas Mingarelli's avatar Thomas Mingarelli Committed by Wim Van Sebroeck
Browse files

[WATCHDOG] hpwdt.c kdebug support 



add kdebug support for the hpwdt.c driver.

Signed-off-by: default avatarThomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 03ec5856

drivers/watchdog/hpwdt.c

+50 −43
Original line number Diff line number Diff line
@@ -116,6 +116,7 @@ static unsigned int reload; /* the computed soft_margin */ 
static int nowayout = WATCHDOG_NOWAYOUT;

static char expect_release;

static unsigned long hpwdt_is_open;

static unsigned int allow_kdump;



static void __iomem *pci_mem_addr;		/* the PCI-memory address */

static unsigned long __iomem *hpwdt_timer_reg;
@@ -356,7 +357,6 @@ asm(".text \n\t" 
    "call       *%r12           \n\t"

    "pushfq                     \n\t"

    "popq        %r12           \n\t"

    "popfq                      \n\t"

    "movl       %eax, (%r9)     \n\t"

    "movl       %ebx, 4(%r9)    \n\t"

    "movl       %ecx, 8(%r9)    \n\t"
@@ -412,34 +412,6 @@ static int __devinit detect_cru_service(void) 


#endif



/*

 *	NMI Handler

 */

static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,

			    void *data)

{

	unsigned long rom_pl;

	static int die_nmi_called;



	if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI)

		return NOTIFY_OK;



	spin_lock_irqsave(&rom_lock, rom_pl);

	if (!die_nmi_called)

		asminline_call(&cmn_regs, cru_rom_addr);

	die_nmi_called = 1;

	spin_unlock_irqrestore(&rom_lock, rom_pl);

	if (cmn_regs.u1.ral == 0) {

		printk(KERN_WARNING "hpwdt: An NMI occurred, "

		       "but unable to determine source.\n");

	} else {

		panic("An NMI occurred, please see the Integrated "

			"Management Log for details.\n");

	}



	return NOTIFY_STOP;

}



/*

 *	Watchdog operations

 */
@@ -483,6 +455,36 @@ static int hpwdt_change_timer(int new_margin) 
	return 0;

}



/*

 *	NMI Handler

 */

static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,

				void *data)

{

	unsigned long rom_pl;

	static int die_nmi_called;



	if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI)

		return NOTIFY_OK;



	spin_lock_irqsave(&rom_lock, rom_pl);

	if (!die_nmi_called)

		asminline_call(&cmn_regs, cru_rom_addr);

	die_nmi_called = 1;

	spin_unlock_irqrestore(&rom_lock, rom_pl);

	if (cmn_regs.u1.ral == 0) {

		printk(KERN_WARNING "hpwdt: An NMI occurred, "

			"but unable to determine source.\n");

	} else {

		if (allow_kdump)

			hpwdt_stop();

		panic("An NMI occurred, please see the Integrated "

			"Management Log for details.\n");

	}



	return NOTIFY_STOP;

}



/*

 *	/dev/watchdog handling

 */
@@ -632,6 +634,7 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev, 
	/*

	 * First let's find out if we are on an iLO2 server. We will

	 * not run on a legacy ASM box.

	 * So we only support the G5 ProLiant servers and higher.

	 */

	if (dev->subsystem_vendor != PCI_VENDOR_ID_HP) {

		dev_warn(&dev->dev,
@@ -699,8 +702,9 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev, 


	printk(KERN_INFO

		"hp Watchdog Timer Driver: 1.00"

		", timer margin: %d seconds( nowayout=%d).\n",

		soft_margin, nowayout);

		", timer margin: %d seconds (nowayout=%d)"

		", allow kernel dump: %s (default = 0/OFF).\n",

		soft_margin, nowayout, (allow_kdump == 0) ? "OFF" : "ON");



	return 0;
@@ -755,6 +759,9 @@ MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); 
module_param(soft_margin, int, 0);

MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds");



module_param(allow_kdump, int, 0);

MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs");



module_param(nowayout, int, 0);

MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="

		__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");