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Maybe fix for packets exact multiple of max sizes

Issue where multiple transfer structures were allocated, where  the transfer size is exact multiple of max size 16K, it allocated one extra before
main
Kurt Eckhardt 5 jaren geleden
bovenliggende
commit
b5246c4a73
1 gewijzigde bestanden met toevoegingen van 15 en 13 verwijderingen
  1. +15
    -13
      ehci.cpp

+ 15
- 13
ehci.cpp Bestand weergeven

@@ -745,21 +745,23 @@ bool USBHost::queue_Data_Transfer(Pipe_t *pipe, void *buffer, uint32_t len, USBD
transfer = allocate_Transfer();
if (!transfer) return false;
data = transfer;
for (count=(len >> 14); count; count--) {
next = allocate_Transfer();
if (!next) {
// free already-allocated qTDs
while (1) {
next = (Transfer_t *)transfer->qtd.next;
free_Transfer(transfer);
if (transfer == data) break;
transfer = next;
if (len) {
for (count=((len-1) >> 14); count; count--) {
next = allocate_Transfer();
if (!next) {
// free already-allocated qTDs
while (1) {
next = (Transfer_t *)transfer->qtd.next;
free_Transfer(transfer);
if (transfer == data) break;
transfer = next;
}
return false;
}
return false;
data->qtd.next = (uint32_t)next;
data = next;
}
data->qtd.next = (uint32_t)next;
data = next;
}
}
// last qTD needs info for followup
data->qtd.next = 1;
data->pipe = pipe;

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