Merge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[sfrench/cifs-2.6.git] / arch / x86 / kernel / cpu / mcheck / mce.c

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index e4cf6ff1c2e1d341bb5ca890cd8dba266ce2aa18..c102ad51025e865c74e004fa4dc69f9c89a2d034 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -772,23 +772,25 @@ EXPORT_SYMBOL_GPL(machine_check_poll);
 static int mce_no_way_out(struct mce *m, char **msg, unsigned long *validp,
                          struct pt_regs *regs)
 {
-       int i, ret = 0;
        char *tmp;
+       int i;
 
        for (i = 0; i < mca_cfg.banks; i++) {
                m->status = mce_rdmsrl(msr_ops.status(i));
-               if (m->status & MCI_STATUS_VAL) {
-                       __set_bit(i, validp);
-                       if (quirk_no_way_out)
-                               quirk_no_way_out(i, m, regs);
-               }
+               if (!(m->status & MCI_STATUS_VAL))
+                       continue;
+
+               __set_bit(i, validp);
+               if (quirk_no_way_out)
+                       quirk_no_way_out(i, m, regs);
 
                if (mce_severity(m, mca_cfg.tolerant, &tmp, true) >= MCE_PANIC_SEVERITY) {
+                       mce_read_aux(m, i);
                        *msg = tmp;
-                       ret = 1;
+                       return 1;
                }
        }
-       return ret;
+       return 0;
 }
 
 /*
@@ -1205,13 +1207,18 @@ void do_machine_check(struct pt_regs *regs, long error_code)
                lmce = m.mcgstatus & MCG_STATUS_LMCES;
 
        /*
+        * Local machine check may already know that we have to panic.
+        * Broadcast machine check begins rendezvous in mce_start()
         * Go through all banks in exclusion of the other CPUs. This way we
         * don't report duplicated events on shared banks because the first one
-        * to see it will clear it. If this is a Local MCE, then no need to
-        * perform rendezvous.
+        * to see it will clear it.
         */
-       if (!lmce)
+       if (lmce) {
+               if (no_way_out)
+                       mce_panic("Fatal local machine check", &m, msg);
+       } else {
                order = mce_start(&no_way_out);
+       }
 
        for (i = 0; i < cfg->banks; i++) {
                __clear_bit(i, toclear);
@@ -1287,12 +1294,17 @@ void do_machine_check(struct pt_regs *regs, long error_code)
                        no_way_out = worst >= MCE_PANIC_SEVERITY;
        } else {
                /*
-                * Local MCE skipped calling mce_reign()
-                * If we found a fatal error, we need to panic here.
+                * If there was a fatal machine check we should have
+                * already called mce_panic earlier in this function.
+                * Since we re-read the banks, we might have found
+                * something new. Check again to see if we found a
+                * fatal error. We call "mce_severity()" again to
+                * make sure we have the right "msg".
                 */
-                if (worst >= MCE_PANIC_SEVERITY && mca_cfg.tolerant < 3)
-                       mce_panic("Machine check from unknown source",
-                               NULL, NULL);
+               if (worst >= MCE_PANIC_SEVERITY && mca_cfg.tolerant < 3) {
+                       mce_severity(&m, cfg->tolerant, &msg, true);
+                       mce_panic("Local fatal machine check!", &m, msg);
+               }
        }
 
        /*