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authorArnd Bergmann <arnd@arndb.de>2008-06-12 19:14:36 +1000
committerPaul Mackerras <paulus@samba.org>2008-06-30 22:30:58 +1000
commit5acb08070dcbabf7347ad73cb8a79a145a2a5152 (patch)
treeebc163bae3fd236996ff6f031ce28d8e75849c56
parentcf2076012f3efbd945ceea67704fe515f8d6171f (diff)
powerpc/cell: Disable ptcal in case of crash kdump
We need to disable ptcal before starting a new kernel after a crash, in order to avoid overwriting data in the kdump kernel. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--arch/powerpc/platforms/cell/ras.c22
1 files changed, 18 insertions, 4 deletions
diff --git a/arch/powerpc/platforms/cell/ras.c b/arch/powerpc/platforms/cell/ras.c
index 655704ad03c..505f9b9bdf0 100644
--- a/arch/powerpc/platforms/cell/ras.c
+++ b/arch/powerpc/platforms/cell/ras.c
@@ -17,6 +17,7 @@
#include <asm/reg.h>
#include <asm/io.h>
#include <asm/prom.h>
+#include <asm/kexec.h>
#include <asm/machdep.h>
#include <asm/rtas.h>
#include <asm/cell-regs.h>
@@ -226,6 +227,11 @@ static int cbe_ptcal_notify_reboot(struct notifier_block *nb,
return cbe_ptcal_disable();
}
+static void cbe_ptcal_crash_shutdown(void)
+{
+ cbe_ptcal_disable();
+}
+
static struct notifier_block cbe_ptcal_reboot_notifier = {
.notifier_call = cbe_ptcal_notify_reboot
};
@@ -241,12 +247,20 @@ int __init cbe_ptcal_init(void)
return -ENODEV;
ret = register_reboot_notifier(&cbe_ptcal_reboot_notifier);
- if (ret) {
- printk(KERN_ERR "Can't disable PTCAL, so not enabling\n");
- return ret;
- }
+ if (ret)
+ goto out1;
+
+ ret = crash_shutdown_register(&cbe_ptcal_crash_shutdown);
+ if (ret)
+ goto out2;
return cbe_ptcal_enable();
+
+out2:
+ unregister_reboot_notifier(&cbe_ptcal_reboot_notifier);
+out1:
+ printk(KERN_ERR "Can't disable PTCAL, so not enabling\n");
+ return ret;
}
arch_initcall(cbe_ptcal_init);