Author: loos
Date: Fri Oct 24 19:18:39 2014
New Revision: 273599
URL: https://svnweb.freebsd.org/changeset/base/273599
Log:
Fix a bug where DMA maps created with bus_dmamap_create() won't increment
the map count and without being able to keep track of the current map
allocation, bus_dma_tag_destroy() will fail to proceed and will return
EBUSY even after all the maps have been correctly destroyed with
bus_dmamap_destroy().
Found while testing the detach method of a NIC.
Tested on: BBB (am335x)
Reviewed by: cognet, ian
MFC after: 1 week
Modified:
head/sys/arm/arm/busdma_machdep-v6.c
Modified: head/sys/arm/arm/busdma_machdep-v6.c
==============================================================================
--- head/sys/arm/arm/busdma_machdep-v6.c Fri Oct 24 18:39:15 2014
(r273598)
+++ head/sys/arm/arm/busdma_machdep-v6.c Fri Oct 24 19:18:39 2014
(r273599)
@@ -719,6 +719,8 @@ bus_dmamap_create(bus_dma_tag_t dmat, in
if (map->flags & DMAMAP_COHERENT)
atomic_add_32(&maps_coherent, 1);
atomic_add_32(&maps_total, 1);
+ dmat->map_count++;
+
return (0);
}
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