From: yangkai <yangkai@ubuntu-fs>
Date: Mon, 15 Aug 2011 10:08:53 +0000 (+0800)
Subject: usb pcd full speed bug fix
X-Git-Tag: firefly_0821_release~9772^2~20^2~4^2~9
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9abd98cb9d038d15012f4d7f32323a7bebff63a8;p=firefly-linux-kernel-4.4.55.git

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 934e1bcc3c68..c4cd58974db3 100755
--- 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 */