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Fix hang part 2...

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I am not sure if you can also get the same hang in the periodic update list as well, but to be on the safe side added same checks as the one that was hanging.
This commit is contained in:
Kurt Eckhardt 2017-11-11 13:20:04 -08:00
parent ca070ebcd4
commit 5737d12b62
1 changed files with 17 additions and 11 deletions
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28
ehci.cpp
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@ -1254,16 +1254,6 @@ void USBHost::delete_Pipe(Pipe_t *pipe)
// find & free all the transfers which completed
println(" Free transfers");
Transfer_t *t = async_followup_first;
#if 0
if (t) {
println(" (Look at QH list first)");
Transfer_t *tr = (Transfer_t *)(pipe->qh.next);
while ((uint32_t)tr & 0xFFFFFFE0) {
println(" $ ", (uint32_t)tr);
tr = (Transfer_t *)(tr->qtd.next);
}
}
#endif
while (t) {
print(" * ", (uint32_t)t);
Transfer_t *next = t->next_followup;
@ -1312,12 +1302,28 @@ void USBHost::delete_Pipe(Pipe_t *pipe)
// TODO: subtract bandwidth from uframe_bandwidth array
// find & free all the transfers which completed
println(" Free transfers");
Transfer_t *t = periodic_followup_first;
while (t) {
print(" * ", (uint32_t)t);
Transfer_t *next = t->next_followup;
if (t->pipe == pipe) {
print(" * remove");
remove_from_periodic_followup_list(t);
free_Transfer(t);
// Only free if not in QH list
Transfer_t *tr = (Transfer_t *)(pipe->qh.next);
while (((uint32_t)tr & 0xFFFFFFE0) && (tr != t)){
tr = (Transfer_t *)(tr->qtd.next);
}
if (tr == t) {
println(" * defer free until QH");
} else {
println(" * free");
free_Transfer(t); // The later code should actually free it...
}
} else {
println("");
}
t = next;
}