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CONFIG_DMA_API_DEBUG: Enable debugging of DMA-API usage

General informations

The Linux kernel configuration item CONFIG_DMA_API_DEBUG:

• prompt: Enable debugging of DMA-API usage
• type: bool
• depends on: CONFIG_HAVE_DMA_API_DEBUG
• defined in lib/Kconfig.debug
• found in Linux kernels: 2.6.30–2.6.39, 3.0–3.9, 3.10-rc+HEAD

Help text

Enable this option to debug the use of the DMA API by device drivers. With this option you will be able to detect common bugs in device drivers like double-freeing of DMA mappings or freeing mappings that were never allocated. This option causes a performance degredation. Use only if you want to debug device drivers. If unsure, say N.

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