Merge branches 'apei', 'battery-mwh-fix', 'bugzilla-10807', 'bugzilla-14736', 'bugzil...

[pandora-kernel.git] / drivers / acpi / apei / erst.c

diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 18645f4..1211c03 100644 (file)
--- 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;
 }
@@ -750,7 +767,9 @@ __setup("erst_disable", setup_erst_disable);
 
 static int erst_check_table(struct acpi_table_erst *erst_tab)
 {
-       if (erst_tab->header_length != sizeof(struct acpi_table_erst))
+       if ((erst_tab->header_length !=
+            (sizeof(struct acpi_table_erst) - sizeof(erst_tab->header)))
+           && (erst_tab->header_length != sizeof(struct acpi_table_einj)))
                return -EINVAL;
        if (erst_tab->header.length < sizeof(struct acpi_table_erst))
                return -EINVAL;