diff options
| author | Peng Fan <peng.fan@nxp.com> | 2016-06-06 13:53:43 +0800 |
|---|---|---|
| committer | Stefan Agner <stefan.agner@toradex.com> | 2017-08-31 19:57:39 -0700 |
| commit | 6d6a643ea12c6fe1a2feaa52f4c6cccfb556bd68 (patch) | |
| tree | 861a216c5e564c6b0f40feb64d1b6e0bc879638a | |
| parent | 4e1c703ed18362d5f0f49a8ab8df86fb1f1ee9ef (diff) | |
MLK-12883 usb: limit USB_MAX_XFER_BLK to 256
For Some USB mass storage devices, such as:
"
- Kingston DataTraveler 2.0 001D7D06CF09B04199C7B3EA
- Class: (from Interface) Mass Storage
- PacketSize: 64 Configurations: 1
- Vendor: 0x0930 Product 0x6545 Version 1.16
"
When `usb read 0x80000000 0 0x2000`, we met
"EHCI timed out on TD - token=0x80008d80".
The devices does not support scsi VPD page, we are not able
to get the maximum transfer length for READ(10)/WRITE(10).
So we limit this to 256 blocks as READ(6).
Signed-off-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit df0052575b2bc9d66ae73584768e1a457ed5d914)
| -rw-r--r-- | common/usb_storage.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/common/usb_storage.c b/common/usb_storage.c index 0345aa22ef..90f12c7ed1 100644 --- a/common/usb_storage.c +++ b/common/usb_storage.c @@ -18,6 +18,8 @@ * BBB support based on /sys/dev/usb/umass.c from * FreeBSD. * + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * * SPDX-License-Identifier: GPL-2.0+ */ @@ -106,7 +108,7 @@ struct us_data { * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are * limited to 65535 blocks. */ -#define USB_MAX_XFER_BLK 65535 +#define USB_MAX_XFER_BLK 256 #else #define USB_MAX_XFER_BLK 20 #endif |