USB: fix endianness in mos7720

[powerpc.git] / drivers / usb / serial / mos7720.c

diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 6ba87e6..b563e2a 100644 (file)
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -103,11 +103,9 @@ static void mos7720_interrupt_callback(struct urb *urb)
 {
        int result;
        int length;
-       __u32 *data;
-       unsigned int status;
+       __u8 *data;
        __u8 sp1;
        __u8 sp2;
-       __u8 st;
 
        dbg("%s"," : Entering\n");
 
@@ -141,18 +139,19 @@ static void mos7720_interrupt_callback(struct urb *urb)
         * Byte 2 IIR Port 2 (port.number is 1)
         * Byte 3 --------------
         * Byte 4 FIFO status for both */
-       if (length && length > 4) {
+
+       /* the above description is inverted
+        *      oneukum 2007-03-14 */
+
+       if (unlikely(length != 4)) {
                dbg("Wrong data !!!");
                return;
        }
 
-       status = *data;
-
-       sp1 = (status & 0xff000000)>>24;
-       sp2 = (status & 0x00ff0000)>>16;
-       st = status & 0x000000ff;
+       sp1 = data[3];
+       sp2 = data[2];
 
-       if ((sp1 & 0x01) || (sp2 & 0x01)) {
+       if ((sp1 | sp2) & 0x01) {
                /* No Interrupt Pending in both the ports */
                dbg("No Interrupt !!!");
        } else {