From: Peng Fan peng.fan@nxp.com
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 Acked-by: Marcel Ziswiler marcel.ziswiler@toradex.com (cherry picked from commit df0052575b2bc9d66ae73584768e1a457ed5d914)
--- This comes from NXP's downstream and has proven to tremendously improve the situation with those odd USB mass storage aka memory sticks. This is why I post it here asking whether or not this may be something benefiting more people. Any feedback and suggestions are welcome.
Changes in v2: - Fixed spelling in comment as suggested by Igor.
common/usb_storage.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/common/usb_storage.c b/common/usb_storage.c index 8c889bb1a6..4e284645f5 100644 --- a/common/usb_storage.c +++ b/common/usb_storage.c @@ -949,7 +949,11 @@ static void usb_stor_set_max_xfer_blk(struct usb_device *udev, * there is enough free heap space left, but the SCSI READ(10) and * WRITE(10) commands are limited to 65535 blocks. */ - blk = USHRT_MAX; + /* + * Some USB mass storage devices have issues, limiting this to 256 + * fixes this. + */ + blk = 256; #else blk = 20; #endif