[Xen-changelog] [xen stable-4.12] x86/crash: fix kexec transition breakage

[patchbot@xxxxxxx]

commit 57a735da3cfad169ba14f414e8c1c6fe9e510028
Author:     Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
AuthorDate: Fri Jul 26 11:01:52 2019 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Jul 26 11:01:52 2019 +0200

    x86/crash: fix kexec transition breakage
    
    Following 6ff560f7f ("x86/SMP: don't try to stop already stopped CPUs")
    an incorrect condition was placed into kexec transition path
    leaving crashing CPU always online breaking kdump kernel entering.
    Correct it by unifying the condition with smp_send_stop().
    
    Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
    master commit: f56813f3470c5b4987963c3c41e4fe16b95c5a3f
    master date: 2019-07-22 18:02:24 +0100
---
 xen/arch/x86/crash.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/crash.c b/xen/arch/x86/crash.c
index f9772dc2ab..a9f3e1890c 100644
--- a/xen/arch/x86/crash.c
+++ b/xen/arch/x86/crash.c
@@ -169,7 +169,7 @@ static void nmi_shootdown_cpus(void)
      */
     iommu_crash_shutdown();
 
-    if ( num_online_cpus() > 1 )
+    if ( cpu_online(cpu) )
     {
         __stop_this_cpu();
 
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.12

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