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 <[EMAIL PROTECTED]>
---
arch/powerpc/platforms/cell/ras.c | 22 ++++++++++++++++++----
1 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/platforms/cell/ras.c
b/arch/powerpc/platforms/cell/ras.c
index 655704a..505f9b9 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);
--
1.5.4.3
--
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