powerpc/pseries: Call ibm,os-term if the ibm,extended-os-term is present
We have had issues in the past with ibm,os-term initiating shutdown of a
partition. This is confusing to the user, especially if panic_timeout is
non zero.
The temporary fix was to avoid calling ibm,os-term if a panic_timeout was set
and since we set it on every boot we basically never call ibm,os-term.
An extended version of ibm,os-term has since been implemented which gives us
the behaviour we want:
"When the platform supports extended ibm,os-term behavior, the return to the
RTAS will always occur unless there is a kernel assisted dump active as
initiated by an ibm,configure-kernel-dump call."
This patch checks for the ibm,extended-os-term property and calls ibm,os-term
if it exists.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 7436784..0e1ec6f 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -691,10 +691,14 @@
{
int status;
- if (panic_timeout)
- return;
-
- if (RTAS_UNKNOWN_SERVICE == rtas_token("ibm,os-term"))
+ /*
+ * Firmware with the ibm,extended-os-term property is guaranteed
+ * to always return from an ibm,os-term call. Earlier versions without
+ * this property may terminate the partition which we want to avoid
+ * since it interferes with panic_timeout.
+ */
+ if (RTAS_UNKNOWN_SERVICE == rtas_token("ibm,os-term") ||
+ RTAS_UNKNOWN_SERVICE == rtas_token("ibm,extended-os-term"))
return;
snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str);
@@ -705,8 +709,7 @@
} while (rtas_busy_delay(status));
if (status != 0)
- printk(KERN_EMERG "ibm,os-term call failed %d\n",
- status);
+ printk(KERN_EMERG "ibm,os-term call failed %d\n", status);
}
static int ibm_suspend_me_token = RTAS_UNKNOWN_SERVICE;