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authorIan Abbott <abbotti@mev.co.uk>2019-04-26 14:54:13 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-27 15:00:35 +0200
commita4965d98b4d1ffa5b22f2039bc9e87898aff4976 (patch)
tree7b32dcae872200090020519a48c75eb9e36c0c45 /tools/perf/scripts/python/export-to-postgresql.py
parent575d927c426b83f5f8d5809f46de177cceffe40c (diff)
staging: comedi: comedi_isadma: Use a non-NULL device for DMA API
The "comedi_isadma" module calls `dma_alloc_coherent()` and `dma_free_coherent()` with a NULL device pointer which is no longer allowed. If the `hw_dev` member of the `struct comedi_device` has been set to a valid device, that can be used instead. Unfortunately, all the current users of the "comedi_isadma" module leave the `hw_dev` member set to NULL. In that case, fall back to using the comedi "class" device pointed to by the `class_dev` member if that is non-NULL. In that case, make it "DMA-capable" with a coherent DMA mask set to the ISA bus limit of 16MB (24 bits). Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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