Messages in this thread | | | From | Florian Fainelli <> | Subject | [PATCH 0/2] dma-debug: prevent early callers from crashing | Date | Thu, 13 Nov 2014 20:31:00 -0800 |
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Hi Dan,
This patch series addresses a problem seen on the brcmstb ARM platform where dma_debug_init is called by the ARM kernel at fs_initcall time, while some of our callers using the DMA-API were running at arch_initcall time.
Unless CONFIG_DMA_API_DEBUG is set, this is completely silent.
First patch introduces a helper function to check whether a DMA-API debug implementation is allowed to proceed, while the second patch introduces an initialization flag and uses the helper. A complete writeup of how and why this crashes is provided in patch 2.
Thank you!
Florian Fainelli (2): dma-debug: introduce dma_debug_disabled dma-debug: prevent early callers from crashing
lib/dma-debug.c | 43 ++++++++++++++++++++++++++++--------------- 1 file changed, 28 insertions(+), 15 deletions(-)
-- 1.9.1
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