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Catch amd64 up with the pending busdma async callback locking. Though this

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mechanism might change in the near future, it's best to keep everything in
sync right now.

Reminded by:	peter
This commit is contained in:
Scott Long 2003-06-28 06:07:06 +00:00
parent e493a5d90c
commit 7f95801188
1 changed files with 5 additions and 0 deletions
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5
sys/amd64/amd64/busdma_machdep.c
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@ -90,6 +90,7 @@ struct bus_dmamap {
bus_size_t buflen; /* unmapped buffer length */
bus_dmamap_callback_t *callback;
void *callback_arg;
struct mtx *callback_mtx;
STAILQ_ENTRY(bus_dmamap) links;
};
@ -867,8 +868,12 @@ busdma_swi(void)
while ((map = STAILQ_FIRST(&bounce_map_callbacklist)) != NULL) {
STAILQ_REMOVE_HEAD(&bounce_map_callbacklist, links);
mtx_unlock(&bounce_lock);
if (map->callback_mtx != NULL)
mtx_lock(map->callback_mtx);
bus_dmamap_load(map->dmat, map, map->buf, map->buflen,
map->callback, map->callback_arg, /*flags*/0);
if (map->callback_mtx != NULL)
mtx_unlock(map->callback_mtx);
mtx_lock(&bounce_lock);
}
mtx_unlock(&bounce_lock);