Messages in this thread | | | From | David Laight <> | Subject | RE: [RFC PATCH] cw1200: use kmalloc() allocation instead of stack | Date | Wed, 30 Jun 2021 16:08:05 +0000 |
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From: Ulf Hansson > Sent: 30 June 2021 11:03 ... > > It turns out that if CONFIG_VMAP_STACK is enabled and src or dst is > > memory allocated on stack, SDIO operations fail due to invalid memory > > address conversion: ... > > Fix that by using kmalloc() allocated memory for read/write 16/32 > > funtions.
Could a field be added to 'struct cw1200_common' that the functions could use as a bounce buffer?
ISTM that is DMA are being done there must be some serialisation in there somewhere that will stop concurrent accesses.
David
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