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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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