3 files changed, 23 insertions, 6 deletions

diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
index 907e350f1c7d..fca34ccfd294 100644
--- a/drivers/acpi/apei/Kconfig
+++ b/drivers/acpi/apei/Kconfig
@@ -34,6 +34,6 @@ config ACPI_APEI_ERST_DEBUG
         depends on ACPI_APEI
         help
           ERST is a way provided by APEI to save and retrieve hardware
-          error infomation to and from a persistent store. Enable this
+          error information to and from a persistent store. Enable this
           if you want to debugging and testing the ERST kernel support
           and firmware implementation.
diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
index 8561cfefa3dc..da1228a9a544 100644
--- a/drivers/acpi/apei/erst-dbg.c
+++ b/drivers/acpi/apei/erst-dbg.c
@@ -2,7 +2,7 @@
  * APEI Error Record Serialization Table debug support
  *
  * ERST is a way provided by APEI to save and retrieve hardware error
- * infomation to and from a persistent store. This file provide the
+ * information to and from a persistent store. This file provide the
  * debugging/testing support for ERST kernel support and firmware
  * implementation.
  *
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 10cc1928ec23..1211c03149e8 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -2,7 +2,7 @@
  * APEI Error Record Serialization Table support
  *
  * ERST is a way provided by APEI to save and retrieve hardware error
- * infomation to and from a persistent store.
+ * information to and from a persistent store.
  *
  * For more information about ERST, please refer to ACPI Specification
  * version 4.0, section 17.4.
@@ -266,13 +266,30 @@ static int erst_exec_move_data(struct apei_exec_context *ctx,
 {
         int rc;
         u64 offset;
+        void *src, *dst;
+
+        /* ioremap does not work in interrupt context */
+        if (in_interrupt()) {
+                pr_warning(ERST_PFX
+                           "MOVE_DATA can not be used in interrupt context");
+                return -EBUSY;
+        }
 
         rc = __apei_exec_read_register(entry, &offset);
         if (rc)
                 return rc;
-        memmove((void *)ctx->dst_base + offset,
-                (void *)ctx->src_base + offset,
-                ctx->var2);
+
+        src = ioremap(ctx->src_base + offset, ctx->var2);
+        if (!src)
+                return -ENOMEM;
+        dst = ioremap(ctx->dst_base + offset, ctx->var2);
+        if (!dst)
+                return -ENOMEM;
+
+        memmove(dst, src, ctx->var2);
+
+        iounmap(src);
+        iounmap(dst);
 
         return 0;
 }