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make bus_dmamem_alloc always allocate a new map like we are suppose to..

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This was found when I tried to run the usb code on my arm board...

Approved by:	cognet
This commit is contained in:
John-Mark Gurney 2005-03-16 00:35:59 +00:00
parent f3011a7c10
commit de71467ca7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=143671
1 changed files with 11 additions and 11 deletions
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22
sys/arm/arm/busdma_machdep.c
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@ -332,18 +332,16 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
if (flags & BUS_DMA_ZERO)
mflags |= M_ZERO;
if (!*mapp) {
newmap = malloc(sizeof(*newmap), M_DEVBUF, M_NOWAIT | M_ZERO);
if (newmap == NULL) {
CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d",
__func__, dmat, dmat->flags, ENOMEM);
return (ENOMEM);
}
dmat->map_count++;
newmap->flags = 0;
*mapp = newmap;
newmap->dmat = dmat;
newmap = malloc(sizeof(*newmap), M_DEVBUF, M_NOWAIT | M_ZERO);
if (newmap == NULL) {
CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d",
__func__, dmat, dmat->flags, ENOMEM);
return (ENOMEM);
}
dmat->map_count++;
newmap->flags = 0;
*mapp = newmap;
newmap->dmat = dmat;
if (dmat->maxsize <= PAGE_SIZE) {
*vaddr = malloc(dmat->maxsize, M_DEVBUF, mflags);
@ -536,6 +534,8 @@ bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
bus_dma_segment_t dm_segments[BUS_DMAMAP_NSEGS];
#endif
KASSERT(dmat != NULL, ("dmatag is NULL"));
KASSERT(map != NULL, ("dmamap is NULL"));
map->flags &= ~DMAMAP_TYPE_MASK;
map->flags |= DMAMAP_LINEAR|DMAMAP_COHERENT;
map->buffer = buf;