RE: [RFC PATCH] cw1200: use kmalloc() allocation instead of stack

From: Ulf Hansson

Sent: 30 June 2021 11:03

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quoted

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:

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quoted

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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