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>
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@ -17,6 +17,7 @@
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#include <asm/reg.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/kexec.h>
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#include <asm/machdep.h>
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#include <asm/rtas.h>
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#include <asm/cell-regs.h>
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@ -226,6 +227,11 @@ static int cbe_ptcal_notify_reboot(struct notifier_block *nb,
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return cbe_ptcal_disable();
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}
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static void cbe_ptcal_crash_shutdown(void)
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{
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cbe_ptcal_disable();
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}
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static struct notifier_block cbe_ptcal_reboot_notifier = {
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.notifier_call = cbe_ptcal_notify_reboot
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};
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@ -241,12 +247,20 @@ int __init cbe_ptcal_init(void)
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return -ENODEV;
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ret = register_reboot_notifier(&cbe_ptcal_reboot_notifier);
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if (ret) {
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printk(KERN_ERR "Can't disable PTCAL, so not enabling\n");
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return ret;
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}
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if (ret)
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goto out1;
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ret = crash_shutdown_register(&cbe_ptcal_crash_shutdown);
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if (ret)
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goto out2;
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return cbe_ptcal_enable();
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out2:
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unregister_reboot_notifier(&cbe_ptcal_reboot_notifier);
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out1:
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printk(KERN_ERR "Can't disable PTCAL, so not enabling\n");
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return ret;
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}
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arch_initcall(cbe_ptcal_init);
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