drivers/usb/core/devio.c: suppress warning with 64k PAGE_SIZE

drivers/usb/core/devio.c: In function 'proc_control':
drivers/usb/core/devio.c:657: warning: comparison is always false due to limited range of data type

Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index ae94176..039ba23 100644 (file)
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -647,6 +647,7 @@ static int proc_control(struct dev_state *ps, void __user *arg)
        struct usbdevfs_ctrltransfer ctrl;
        unsigned int tmo;
        unsigned char *tbuf;
+       unsigned wLength;
        int i, j, ret;
 
        if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
@@ -654,7 +655,8 @@ static int proc_control(struct dev_state *ps, void __user *arg)
        ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex);
        if (ret)
                return ret;
-       if (ctrl.wLength > PAGE_SIZE)
+       wLength = ctrl.wLength;         /* To suppress 64k PAGE_SIZE warning */
+       if (wLength > PAGE_SIZE)
                return -EINVAL;
        tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
        if (!tbuf)