From: Jason Andryuk <jandryuk@gmail.com>
Date: Mon, 16 Mar 2020 17:46:09 +0000 (-0400)
Subject: usb-serial: Increase receive buffer to 496
X-Git-Tag: v5.0.0-rc0~32^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=30ad5fdd34d9cfc9f16e73e0229c133d7317a42a;p=thirdparty%2Fqemu.git

usb-serial: Increase receive buffer to 496

A FTDI USB adapter on an xHCI controller can send 512 byte USB packets.
These are 8 * ( 2 bytes header + 62 bytes data).  A 384 byte receive
buffer is insufficient to fill a 512 byte packet, so bump the receive
size to 496 ( 512 - 2 * 8 ).

Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Message-id: 20200316174610.115820-4-jandryuk@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---

diff --git a/hw/usb/dev-serial.c b/hw/usb/dev-serial.c
index ec091b6a366..77b964588b5 100644
--- a/hw/usb/dev-serial.c
+++ b/hw/usb/dev-serial.c
@@ -29,7 +29,7 @@ do { printf("usb-serial: " fmt , ## __VA_ARGS__); } while (0)
 #define DPRINTF(fmt, ...) do {} while(0)
 #endif
 
-#define RECV_BUF 384
+#define RECV_BUF (512 - (2 * 8))
 
 /* Commands */
 #define FTDI_RESET		0