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

[David Laight]

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

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)