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| author | Tony Lindgren <tony@atomide.com> | 2018-11-08 09:32:24 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2018-11-08 09:32:24 -0800 |
| commit | 91e43395820baad80248987608216c35da9df65b (patch) | |
| tree | 29d41d1a036eb1abd6a60f16ad37aa578acd8159 /kernel/dma/debug.c | |
| parent | eef3dc34a1e0b01d53328b88c25237bcc7323777 (diff) | |
| parent | cec83ff1241ec98113a19385ea9e9cfa9aa4125b (diff) | |
Merge branch 'fixes-dts' into omap-for-v4.20/fixes
Diffstat (limited to 'kernel/dma/debug.c')
| -rw-r--r-- | kernel/dma/debug.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c index c007d25bee09..231ca4628062 100644 --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -1312,6 +1312,22 @@ static void check_sg_segment(struct device *dev, struct scatterlist *sg) #endif } +void debug_dma_map_single(struct device *dev, const void *addr, + unsigned long len) +{ + if (unlikely(dma_debug_disabled())) + return; + + if (!virt_addr_valid(addr)) + err_printk(dev, NULL, "DMA-API: device driver maps memory from invalid area [addr=%p] [len=%lu]\n", + addr, len); + + if (is_vmalloc_addr(addr)) + err_printk(dev, NULL, "DMA-API: device driver maps memory from vmalloc area [addr=%p] [len=%lu]\n", + addr, len); +} +EXPORT_SYMBOL(debug_dma_map_single); + void debug_dma_map_page(struct device *dev, struct page *page, size_t offset, size_t size, int direction, dma_addr_t dma_addr, bool map_single) |