[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH 3/4] usb-serial: Increase receive buffer to 496
From: |
Jason Andryuk |
Subject: |
[PATCH 3/4] usb-serial: Increase receive buffer to 496 |
Date: |
Thu, 12 Mar 2020 08:55:22 -0400 |
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 <address@hidden>
---
hw/usb/dev-serial.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/usb/dev-serial.c b/hw/usb/dev-serial.c
index 96b6c34202..ef33bcd127 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
--
2.24.1
- [PATCH 0/4] usb-serial: xHCI and timeout fixes, Jason Andryuk, 2020/03/12
- [PATCH 1/4] usb-serial: Move USB_TOKEN_IN into a helper function, Jason Andryuk, 2020/03/12
- [PATCH 2/4] usb-serial: chunk data to wMaxPacketSize, Jason Andryuk, 2020/03/12
- [PATCH 3/4] usb-serial: Increase receive buffer to 496,
Jason Andryuk <=
- [PATCH 4/4] usb-serial: Fix timeout closing the device, Jason Andryuk, 2020/03/12
- Re: [PATCH 0/4] usb-serial: xHCI and timeout fixes, no-reply, 2020/03/12
- Re: [PATCH 0/4] usb-serial: xHCI and timeout fixes, no-reply, 2020/03/12