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Commit 5acb0807 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Paul Mackerras
Browse files

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: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarJeremy Kerr <jk@ozlabs.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent cf207601

arch/powerpc/platforms/cell/ras.c

+18 −4
Original line number Diff line number Diff line
@@ -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);