USB: make transfer_buffer_lengths in struct urb field u32

Roel Kluin pointed out that transfer_buffer_lengths in struct urb was
declared as an 'int'.  This patch changes this field to be 'u32' to
prevent any potential negative conversion and comparison errors.

This triggered a few compiler warning messages when these fields were
being used with the min macro, so they have also been fixed up in this
patch.

Cc: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index 4dda31b26892..a2b305477afe 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -772,7 +772,7 @@ static int isp116x_urb_enqueue(struct usb_hcd *hcd,
                 break;
         case PIPE_INTERRUPT:
                 urb->interval = ep->period;
-                ep->length = min((int)ep->maxpacket,
+                ep->length = min_t(u32, ep->maxpacket,
                                  urb->transfer_buffer_length);
 
                 /* urb submitted for already existing endpoint */