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/openbmc/linux/drivers/dma/ |
H A D | mpc512x_dma.c | a2769913 Tue Oct 26 18:52:58 CDT 2010 Ilya Yanok <yanok@emcraft.com> powerpc/512x: try to free dma descriptors in case of allocation failure
Currently completed descriptors are processed in the tasklet. This can lead to dead lock in case of CONFIG_NET_DMA enabled (new requests are submitted from softirq context and dma_memcpy_to_iovec() busy loops until the requests is submitted). To prevent this we should process completed descriptors from the allocation failure path in prepare_memcpy too.
Signed-off-by: Ilya Yanok <yanok@emcraft.com> Cc: Piotr Ziecik <kosmo@semihalf.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> a2769913 Tue Oct 26 18:52:58 CDT 2010 Ilya Yanok <yanok@emcraft.com> powerpc/512x: try to free dma descriptors in case of allocation failure Currently completed descriptors are processed in the tasklet. This can lead to dead lock in case of CONFIG_NET_DMA enabled (new requests are submitted from softirq context and dma_memcpy_to_iovec() busy loops until the requests is submitted). To prevent this we should process completed descriptors from the allocation failure path in prepare_memcpy too. Signed-off-by: Ilya Yanok <yanok@emcraft.com> Cc: Piotr Ziecik <kosmo@semihalf.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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