USB: mxc: gadget: Fix bitfield for calculating maximum packet size

commit 88e3b59b5adce5b12e205af0e34d518ba0dcdc0c upstream.

The max packet length bit mask used for isochronous endpoints
should be 0x7FF instead of 0x8FF. 0x8FF will actually clear
higher-order bits in the max packet length field.

This patch applies to 2.6.34-rc6.

Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index fa3d142ba64d966aa4bf454a4f2a55480970bc4f..08a9a62a39e34910ecbcb3fdb8381c044fa851e4 100644 (file)
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -489,7 +489,7 @@ static int fsl_ep_enable(struct usb_ep *_ep,
        case USB_ENDPOINT_XFER_ISOC:
                /* Calculate transactions needed for high bandwidth iso */
                mult = (unsigned char)(1 + ((max >> 11) & 0x03));
-               max = max & 0x8ff;      /* bit 0~10 */
+               max = max & 0x7ff;      /* bit 0~10 */
                /* 3 transactions at most */
                if (mult > 3)
                        goto en_done;