usb pcd full speed bug fix

diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 934e1bcc3c68cbfb2d768ae7af5c2405b0cdd267..c4cd58974db31918b8b1db0bfb2fb6dabd454a38 100755 (executable)
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -840,6 +840,13 @@ static int do_read(struct fsg_dev *fsg)
                        amount = min(amount, (unsigned int) PAGE_CACHE_SIZE -
                                        partial_page);
 
+               /* kever@rk
+                * max size for dwc_otg ctonroller is 64(max pkt sizt) * 1023(pkt)
+                * because of the DOEPTSIZ.PKTCNT has only 10 bits
+                */
+               if((fsg->cdev->gadget->speed != USB_SPEED_HIGH)&&(amount >0x8000))
+                   amount = 0x8000;
+
                /* Wait for the next buffer to become available */
                bh = fsg->next_buffhd_to_fill;
                while (bh->state != BUF_STATE_EMPTY) {
@@ -1002,6 +1009,13 @@ static int do_write(struct fsg_dev *fsg)
                        amount_left_to_req -= amount;
                        if (amount_left_to_req == 0)
                                get_some_more = 0;
+                               
+                       /* kever@rk
+                        * max size for dwc_otg ctonroller is 64(max pkt sizt) * 1023(pkt)
+                        * because of the DOEPTSIZ.PKTCNT has only 10 bits
+                        */
+                       if((fsg->cdev->gadget->speed != USB_SPEED_HIGH)&&(amount >0x8000))
+                           amount = 0x8000;
 
                        /* amount is always divisible by 512, hence by
                         * the bulk-out maxpacket size */