lkml.org 
[lkml]   [2021]   [Jun]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [RFC PATCH] cw1200: use kmalloc() allocation instead of stack
Date
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)
\
 
 \ /
  Last update: 2021-06-30 18:09    [W:0.056 / U:0.796 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site