lkml.org 
[lkml]   [2010]   [Feb]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] isp1760: Flush the D-cache for the pipe-in transfer buffers
* Catalin Marinas | 2010-02-02 11:11:35 [+0000]:

>When the HDC driver writes the data to the transfer buffers it pollutes
>the D-cache (unlike DMA drivers where the device writes the data). If
>the corresponding pages get mapped into user space, there are no
>additional cache flushing operations performed and this causes random
>user space faults on architectures with separate I and D caches
>(Harvard) or those with aliasing D-cache.

After looking through lib/scatterlist.c it uses
#include <linux/highmem.h>

and

flush_kernel_dcache_page().
Wouldn't this do the job here as well?

Sebastain


\
 
 \ /
  Last update: 2010-02-02 13:11    [W:0.046 / U:0.380 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site