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path: root/drivers/misc/sgi-xp/xpc_main.c
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Diffstat (limited to 'drivers/misc/sgi-xp/xpc_main.c')
-rw-r--r--drivers/misc/sgi-xp/xpc_main.c34
1 files changed, 32 insertions, 2 deletions
diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c
index 8d082b46426b..d971817182f7 100644
--- a/drivers/misc/sgi-xp/xpc_main.c
+++ b/drivers/misc/sgi-xp/xpc_main.c
@@ -53,6 +53,10 @@
#include <linux/kthread.h>
#include "xpc.h"
+#ifdef CONFIG_X86_64
+#include <asm/traps.h>
+#endif
+
/* define two XPC debug device structures to be used with dev_dbg() et al */
struct device_driver xpc_dbg_name = {
@@ -1079,6 +1083,9 @@ xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
return NOTIFY_DONE;
}
+/* Used to only allow one cpu to complete disconnect */
+static unsigned int xpc_die_disconnecting;
+
/*
* Notify other partitions to deactivate from us by first disengaging from all
* references to our memory.
@@ -1092,6 +1099,9 @@ xpc_die_deactivate(void)
long keep_waiting;
long wait_to_print;
+ if (cmpxchg(&xpc_die_disconnecting, 0, 1))
+ return;
+
/* keep xpc_hb_checker thread from doing anything (just in case) */
xpc_exiting = 1;
@@ -1159,7 +1169,7 @@ xpc_die_deactivate(void)
* about the lack of a heartbeat.
*/
static int
-xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
+xpc_system_die(struct notifier_block *nb, unsigned long event, void *_die_args)
{
#ifdef CONFIG_IA64 /* !!! temporary kludge */
switch (event) {
@@ -1191,7 +1201,27 @@ xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
break;
}
#else
- xpc_die_deactivate();
+ struct die_args *die_args = _die_args;
+
+ switch (event) {
+ case DIE_TRAP:
+ if (die_args->trapnr == X86_TRAP_DF)
+ xpc_die_deactivate();
+
+ if (((die_args->trapnr == X86_TRAP_MF) ||
+ (die_args->trapnr == X86_TRAP_XF)) &&
+ !user_mode_vm(die_args->regs))
+ xpc_die_deactivate();
+
+ break;
+ case DIE_INT3:
+ case DIE_DEBUG:
+ break;
+ case DIE_OOPS:
+ case DIE_GPF:
+ default:
+ xpc_die_deactivate();
+ }
#endif
return NOTIFY_DONE;