Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 6 insertions, 7 deletions

diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index bfa8b76de403..2dbb1b0f11d5 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -58,9 +58,8 @@ acpi_system_read_event(struct file *file, char __user * buffer, size_t count,
                         return_VALUE(-EAGAIN);
 
                 result = acpi_bus_receive_event(&event);
-                if (result) {
-                        return_VALUE(-EIO);
-                }
+                if (result)
+                        return_VALUE(result);
 
                 chars_remaining = sprintf(str, "%s %s %08x %08x\n",
                                           event.device_class ? event.
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index e36c5da2b31a..3937adf4e5e5 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -96,7 +96,7 @@ struct acpi_find_pci_root {
 static acpi_status
 do_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
 {
-        int *busnr = (int *)data;
+        unsigned long *busnr = (unsigned long *)data;
         struct acpi_resource_address64 address;
 
         if (resource->id != ACPI_RSTYPE_ADDRESS16 &&
@@ -115,13 +115,13 @@ do_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
 static int get_root_bridge_busnr(acpi_handle handle)
 {
         acpi_status status;
-        int bus, bbn;
+        unsigned long bus, bbn;
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 
         acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
 
         status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL,
-                                       (unsigned long *)&bbn);
+                                       &bbn);
         if (status == AE_NOT_FOUND) {
                 /* Assume bus = 0 */
                 printk(KERN_INFO PREFIX
@@ -153,7 +153,7 @@ static int get_root_bridge_busnr(acpi_handle handle)
         }
       exit:
         acpi_os_free(buffer.pointer);
-        return bbn;
+        return (int)bbn;
 }
 
 static acpi_status