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dma-debug: add a check dma memory leaks

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Impact: allow architectures to monitor busses for dma mem leakage

This patch adds checking code to detect if a device has pending DMA
operations when it is about to be unbound from its device driver.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel
2009-03-16 17:32:14 +01:00
parent 2e34bde185
commit 41531c8f5f
2 changed files with 62 additions and 0 deletions
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7
include/linux/dma-debug.h
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@ -24,9 +24,12 @@
struct device;
struct scatterlist;
struct bus_type;
#ifdef CONFIG_DMA_API_DEBUG
extern void dma_debug_add_bus(struct bus_type *bus);
extern void dma_debug_init(u32 num_entries);
extern void debug_dma_map_page(struct device *dev, struct page *page,
@ -80,6 +83,10 @@ extern void debug_dma_dump_mappings(struct device *dev);
#else /* CONFIG_DMA_API_DEBUG */
void dma_debug_add_bus(struct bus_type *bus)
{
}
static inline void dma_debug_init(u32 num_entries)
{
}