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usb_keyboard: Try clearing endpoint stall on transfer failure.

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As the keyboard is used from usb_hid in the userland as well, we quite
probably are not in sync with the data toggle. Clearing the stall
should restore the toggle and make things work.
This commit is contained in:
Michael Lotz
2014-08-31 23:02:31 +02:00
parent e31cac6e5a
commit dbd527de10
1 changed files with 7 additions and 1 deletions
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src/add-ons/kernel/debugger/usb_keyboard/usb_keyboard.cpp
+7 -1
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@@ -206,9 +206,15 @@ debugger_getchar(void)
set_debug_variable("_usbTransferLength", (uint64)sUSBTransferLength);
status_t status = evaluate_debug_command("usb_process_transfer");
if (status != B_OK)
if (status == B_DEV_PENDING)
return -1;
if (status != B_OK) {
// try clearing a possibly set halt due to toggle mismatches
evaluate_debug_command("usb_clear_stall");
return -1;
}
bool phantomState = true;
for (size_t i = 2; i < sUSBTransferLength; i++) {
if (sUSBTransferData[i] != 0x01) {