[Xen-changelog] [xen stable-4.6] x86/mce: always re-initialize 'severity_cpu' in mcheck_cmn_handler()

[patchbot@xxxxxxx]

commit 4f290909663600b92444a3bd924d443fb32ca7c6
Author:     Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
AuthorDate: Wed May 3 17:16:21 2017 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed May 3 17:16:21 2017 +0200

    x86/mce: always re-initialize 'severity_cpu' in mcheck_cmn_handler()
    
    mcheck_cmn_handler() does not always set 'severity_cpu' to override
    its value taken from previous rounds of MC handling, which will
    interfere the current round of MC handling. Always re-initialize it to
    clear the historical value.
    
    Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    master commit: 6a2c6a68423475cd89a8cc9978554880e5a21b7d
    master date: 2017-04-07 15:56:09 +0200
---
 xen/arch/x86/cpu/mcheck/mce.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/arch/x86/cpu/mcheck/mce.c b/xen/arch/x86/cpu/mcheck/mce.c
index e8b0773..f82d4cb 100644
--- a/xen/arch/x86/cpu/mcheck/mce.c
+++ b/xen/arch/x86/cpu/mcheck/mce.c
@@ -534,6 +534,7 @@ void mcheck_cmn_handler(const struct cpu_user_regs *regs)
             mc_panic(ebuf);
         }
         atomic_set(&found_error, 0);
+        atomic_set(&severity_cpu, -1);
     }
     mce_barrier_exit(&mce_trap_bar); 
 
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.6

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