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Commit 88e3b59b authored by Dinh Nguyen's avatar Dinh Nguyen Committed by Greg Kroah-Hartman
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USB: mxc: gadget: Fix bitfield for calculating maximum packet size 



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: default avatarDinh Nguyen <Dinh.Nguyen@freescale.com>
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 97dc7c61

drivers/usb/gadget/fsl_udc_core.c

+1 −1
Original line number Diff line number Diff line
@@ -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;