From: Matthias Fend <Matthias.Fend@wolfvision.net>
Date: Mon, 7 May 2012 12:37:30 +0000 (+0200)
Subject: USB: ffs-test: fix length argument of out function call
X-Git-Tag: firefly_0821_release~7541^2~1138
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8c2a6ba40833258c8800c7ccc638d0f37c045e10;p=firefly-linux-kernel-4.4.55.git

USB: ffs-test: fix length argument of out function call

commit eb9c5836384cd2a276254df6254ed71117983626 upstream.

The out functions should only handle actual available data instead of the complete buffer.
Otherwise for example the ep0_consume function will report ghost events since it tries to decode
the complete buffer - which may contain partly invalid data.

Signed-off-by: Matthias Fend <matthias.fend@wolfvision.net>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/tools/usb/ffs-test.c b/tools/usb/ffs-test.c
index b9c798631699..f17dfee1e21b 100644
--- a/tools/usb/ffs-test.c
+++ b/tools/usb/ffs-test.c
@@ -324,7 +324,7 @@ static void *start_thread_helper(void *arg)
 
 		ret = t->in(t, t->buf, t->buf_size);
 		if (ret > 0) {
-			ret = t->out(t, t->buf, t->buf_size);
+			ret = t->out(t, t->buf, ret);
 			name = out_name;
 			op = "write";
 		} else {