From: Paul Kocialkowski <contact@paulk.fr>
Date: Sat, 4 Jul 2015 14:46:15 +0000 (+0200)
Subject: usb: gadget: fastboot: Request status and length check in rx handler
X-Git-Tag: v2015.10-rc1~70^2~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=94b385fa236c85b00ee0bceced05aad2550c2208;p=platform%2Fkernel%2Fu-boot.git

usb: gadget: fastboot: Request status and length check in rx handler

This avoids handling requests that have an error status or no data.
In particular, this avoids showing unnecessary error messages when the USB
gadget gets disconnected (e.g. with fastboot continue) and the fastboot USB
gadget driver sends an error back to the host (that has disconnected already).

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
---

diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
index 206b6d17ae..b9a909986b 100644
--- a/drivers/usb/gadget/f_fastboot.c
+++ b/drivers/usb/gadget/f_fastboot.c
@@ -635,6 +635,9 @@ static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
 	void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL;
 	int i;
 
+	if (req->status != 0 || req->length == 0)
+		return;
+
 	for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) {
 		if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) {
 			func_cb = cmd_dispatch_info[i].cb;
@@ -656,9 +659,7 @@ static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
 		}
 	}
 
-	if (req->status == 0) {
-		*cmdbuf = '\0';
-		req->actual = 0;
-		usb_ep_queue(ep, req, 0);
-	}
+	*cmdbuf = '\0';
+	req->actual = 0;
+	usb_ep_queue(ep, req, 0);
 }