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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 06:25:14 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 06:25:14 +0400
commit5ec29e3149d800e6db83c1b6ff441daf319cbbe2 (patch)
treeb23ecaff7078590215e91b2b6aa4c90c2d923e10 /drivers
parentabd209b7083b2f3a2a19e522f688e7569f284e5d (diff)
parent6ff968cca1dfebd4b6fcade87c11658dbfc96932 (diff)
downloadlinux-5ec29e3149d800e6db83c1b6ff441daf319cbbe2.tar.xz
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core locking updates from Ingo Molnar: "This update: - extends and simplifies x86 NMI callback handling code to enhance and fix the HP hw-watchdog driver - simplifies the x86 NMI callback handling code to fix a kmemcheck bug. - enhances the hung-task debugger" * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/nmi: Fix the type of the nmiaction.flags field x86/nmi: Fix page faults by nmiaction if kmemcheck is enabled x86/nmi: Add new NMI queues to deal with IO_CHK and SERR watchdog, hpwdt: Remove priority option for NMI callback hung task debugging: Inject NMI when hung and going to panic
Diffstat (limited to 'drivers')
-rw-r--r--drivers/watchdog/hpwdt.c46
1 files changed, 24 insertions, 22 deletions
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 9f13b897fd64..23885f2d56a0 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -147,7 +147,6 @@ struct cmn_registers {
static unsigned int hpwdt_nmi_decoding;
static unsigned int allow_kdump;
-static unsigned int priority; /* hpwdt at end of die_notify list */
static unsigned int is_icru;
static DEFINE_SPINLOCK(rom_lock);
static void *cru_rom_addr;
@@ -723,28 +722,35 @@ static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev)
}
/*
- * If the priority is set to 1, then we will be put first on the
- * die notify list to handle a critical NMI. The default is to
- * be last so other users of the NMI signal can function.
+ * Only one function can register for NMI_UNKNOWN
*/
- retval = register_nmi_handler(NMI_UNKNOWN, hpwdt_pretimeout,
- (priority) ? NMI_FLAG_FIRST : 0,
- "hpwdt");
- if (retval != 0) {
- dev_warn(&dev->dev,
- "Unable to register a die notifier (err=%d).\n",
- retval);
- if (cru_rom_addr)
- iounmap(cru_rom_addr);
- }
+ retval = register_nmi_handler(NMI_UNKNOWN, hpwdt_pretimeout, 0, "hpwdt");
+ if (retval)
+ goto error;
+ retval = register_nmi_handler(NMI_SERR, hpwdt_pretimeout, 0, "hpwdt");
+ if (retval)
+ goto error1;
+ retval = register_nmi_handler(NMI_IO_CHECK, hpwdt_pretimeout, 0, "hpwdt");
+ if (retval)
+ goto error2;
dev_info(&dev->dev,
"HP Watchdog Timer Driver: NMI decoding initialized"
- ", allow kernel dump: %s (default = 0/OFF)"
- ", priority: %s (default = 0/LAST).\n",
- (allow_kdump == 0) ? "OFF" : "ON",
- (priority == 0) ? "LAST" : "FIRST");
+ ", allow kernel dump: %s (default = 0/OFF)\n",
+ (allow_kdump == 0) ? "OFF" : "ON");
return 0;
+
+error2:
+ unregister_nmi_handler(NMI_SERR, "hpwdt");
+error1:
+ unregister_nmi_handler(NMI_UNKNOWN, "hpwdt");
+error:
+ dev_warn(&dev->dev,
+ "Unable to register a die notifier (err=%d).\n",
+ retval);
+ if (cru_rom_addr)
+ iounmap(cru_rom_addr);
+ return retval;
}
static void hpwdt_exit_nmi_decoding(void)
@@ -881,10 +887,6 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
#ifdef CONFIG_HPWDT_NMI_DECODING
module_param(allow_kdump, int, 0);
MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs");
-
-module_param(priority, int, 0);
-MODULE_PARM_DESC(priority, "The hpwdt driver handles NMIs first or last"
- " (default = 0/Last)\n");
#endif /* !CONFIG_HPWDT_NMI_DECODING */
module_init(hpwdt_init);