HID: Move dereferences below a NULL test

If the NULL test is necessary, then the dereferences should be moved below
the NULL test.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
type T;
expression E,E1;
identifier i,fld;
statement S;
@@

- T i = E->fld;
+ T i;
  ... when != E=E1
      when != i
  if (E == NULL||...) S
+ i = E->fld;
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index f2c21d5..5eb10c2 100644 (file)
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1075,14 +1075,16 @@ EXPORT_SYMBOL_GPL(hid_report_raw_event);
  */
 int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt)
 {
-       struct hid_report_enum *report_enum = hid->report_enum + type;
-       struct hid_driver *hdrv = hid->driver;
+       struct hid_report_enum *report_enum;
+       struct hid_driver *hdrv;
        struct hid_report *report;
        unsigned int i;
        int ret;
 
        if (!hid || !hid->driver)
                return -ENODEV;
+       report_enum = hid->report_enum + type;
+       hdrv = hid->driver;
 
        if (!size) {
                dbg_hid("empty report\n");