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Patch by Matthias: The residue field is not maintained 

correctly by all USB devices, so calculate it instead.
Gets some USB disk devices working like the SuperTOP.
MacOS X is doing the same thing, as researched by Jérôme.
Closes ticket #6604. Thanks!


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38836 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus 2010-09-28 17:30:15 +00:00
parent af3b61f013
commit 395346c411
1 changed files with 10 additions and 10 deletions
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20
src/add-ons/kernel/drivers/disk/usb/usb_disk/usb_disk.cpp
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@ -362,16 +362,14 @@ usb_disk_operation(device_lun *lun, uint8 operation, uint8 opLength,
switch (status.status) {
case CSW_STATUS_COMMAND_PASSED:
case CSW_STATUS_COMMAND_FAILED: {
if (status.data_residue > command.data_transfer_length) {
// command status wrapper is not meaningful
TRACE_ALWAYS("command status wrapper has invalid residue\n");
usb_disk_reset_recovery(device);
return B_ERROR;
}
case CSW_STATUS_COMMAND_FAILED:
{
// The residue from "status.data_residue" is not maintained
// correctly by some devices, so calculate it instead.
uint32 residue = command.data_transfer_length - transferedData;
if (dataLength != NULL) {
*dataLength -= status.data_residue;
*dataLength -= residue;
if (transferedData < *dataLength) {
TRACE_ALWAYS("less data transfered than indicated\n");
*dataLength = transferedData;
@ -393,14 +391,16 @@ usb_disk_operation(device_lun *lun, uint8 operation, uint8 opLength,
}
}
case CSW_STATUS_PHASE_ERROR: {
case CSW_STATUS_PHASE_ERROR:
{
// a protocol or device error occured
TRACE_ALWAYS("phase error in operation 0x%02x\n", operation);
usb_disk_reset_recovery(device);
return B_ERROR;
}
default: {
default:
{
// command status wrapper is not meaningful
TRACE_ALWAYS("command status wrapper has invalid status\n");
usb_disk_reset_recovery(device);