lkml.org 
[lkml]   [2005]   [Feb]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject
Date
Russell King <rmk+lkml@arm.linux.org.uk> wrote:

> Since we map the whole lot in one go, if you get one page, there's no
> reason why you shouldn't get the lot. This is why I'm wondering if
> it has something to do with your other modifications.

my colleage has found the bug: in the function dma_mmap in
arch/arm/mm/consistent.c the call to remap_pfn_range uses user_size in
PAGE_SIZE units, but looks like it is expected in bytes. When using
(user_size << PAGE_SHIFT), it works.

I don't know, where to fix it: Should the lower level calls get the size in
bytes (most function arguments in Linux kernel sources are not commented),
this means fixing the dma_mmap, or should PAGE_SIZE be used, then the lower
level functions needs to be fixed.

--
Frank Buß, fb@frank-buss.de
http://www.frank-buss.de, http://www.it4-systems.de

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:10    [W:0.020 / U:3.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site