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- Don't check the dma map address for a static DMA mapping against NULL

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to determine if the mapping is valid.
- Don't explicitly destroy the dmap map for static DMA mappings.

Reviewed by:	adrian
This commit is contained in:
John Baldwin 2014-06-13 19:40:02 +00:00
parent 8d461aafd8
commit 0f698bd800
1 changed files with 6 additions and 10 deletions
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16
sys/dev/iwn/if_iwn.c
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@ -1733,16 +1733,12 @@ fail: iwn_dma_contig_free(dma);
static void
iwn_dma_contig_free(struct iwn_dma_info *dma)
{
if (dma->map != NULL) {
if (dma->vaddr != NULL) {
bus_dmamap_sync(dma->tag, dma->map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(dma->tag, dma->map);
bus_dmamem_free(dma->tag, dma->vaddr, dma->map);
dma->vaddr = NULL;
}
bus_dmamap_destroy(dma->tag, dma->map);
dma->map = NULL;
if (dma->vaddr != NULL) {
bus_dmamap_sync(dma->tag, dma->map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(dma->tag, dma->map);
bus_dmamem_free(dma->tag, dma->vaddr, dma->map);
dma->vaddr = NULL;
}
if (dma->tag != NULL) {
bus_dma_tag_destroy(dma->tag);