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powerpc/kexec: Wait 1s for secondaries to enter OPAL 

Always include a timeout when waiting for secondary cpus to enter OPAL
in the kexec path, rather than only when crashing.

Signed-off-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Samuel Mendoza-Jonas 2015-07-22 15:54:29 +10:00 committed by Michael Ellerman
parent 255e8e046c
commit 1b70386c99
1 changed files with 13 additions and 8 deletions
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21
arch/powerpc/platforms/powernv/setup.c
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@ -187,7 +187,7 @@ static void pnv_kexec_wait_secondaries_down(void)
for_each_online_cpu(i) {
uint8_t status;
int64_t rc;
int64_t rc, timeout = 1000;
if (i == my_cpu)
continue;
@ -204,6 +204,18 @@ static void pnv_kexec_wait_secondaries_down(void)
i, paca[i].hw_cpu_id);
notified = i;
}
/*
* On crash secondaries might be unreachable or hung,
* so timeout if we've waited too long
* */
mdelay(1);
if (timeout-- == 0) {
printk(KERN_ERR "kexec: timed out waiting for "
"cpu %d (physical %d) to enter OPAL\n",
i, paca[i].hw_cpu_id);
break;
}
}
}
}
@ -225,13 +237,6 @@ static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
/* Return the CPU to OPAL */
opal_return_cpu();
} else if (crash_shutdown) {
/*
* On crash, we don't wait for secondaries to go
* down as they might be unreachable or hung, so
* instead we just wait a bit and move on.
*/
mdelay(1);
} else {
/* Primary waits for the secondaries to have reached OPAL */
pnv_kexec_wait_secondaries_down();