1 files changed, 20 insertions, 4 deletions

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 740b440fbd73..7bca3c6a02fb 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -519,29 +519,45 @@ u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type,
         printk(KERN_DEBUG "e820 remove range: %016Lx - %016Lx ",
                        (unsigned long long) start,
                        (unsigned long long) end);
-        e820_print_type(old_type);
+        if (checktype)
+                e820_print_type(old_type);
         printk(KERN_CONT "\n");
 
         for (i = 0; i < e820.nr_map; i++) {
                 struct e820entry *ei = &e820.map[i];
                 u64 final_start, final_end;
+                u64 ei_end;
 
                 if (checktype && ei->type != old_type)
                         continue;
+
+                ei_end = ei->addr + ei->size;
                 /* totally covered? */
-                if (ei->addr >= start &&
-                    (ei->addr + ei->size) <= (start + size)) {
+                if (ei->addr >= start && ei_end <= end) {
                         real_removed_size += ei->size;
                         memset(ei, 0, sizeof(struct e820entry));
                         continue;
                 }
+
+                /* new range is totally covered? */
+                if (ei->addr < start && ei_end > end) {
+                        e820_add_region(end, ei_end - end, ei->type);
+                        ei->size = start - ei->addr;
+                        real_removed_size += size;
+                        continue;
+                }
+
                 /* partially covered */
                 final_start = max(start, ei->addr);
-                final_end = min(start + size, ei->addr + ei->size);
+                final_end = min(end, ei_end);
                 if (final_start >= final_end)
                         continue;
                 real_removed_size += final_end - final_start;
 
+                /*
+                 * left range could be head or tail, so need to update
+                 * size at first.
+                 */
                 ei->size -= final_end - final_start;
                 if (ei->addr < final_start)
                         continue;