[lkml]   [2016]   [Jun]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] dsa: b53: fix big-endian register access
On 06/16/2016 02:00 AM, Arnd Bergmann wrote:
> The b53 dsa register access confusingly uses __raw register accessors
> when both the CPU and the device are big-endian, but it uses little-
> endian accessors when the same device is used from a little-endian
> CPU, which makes no sense.
> This uses normal accessors in device-endianess all the time, which
> will work in all four combinations of register and CPU endianess,
> and it will have the same barrier semantics in all cases.
> This also seems to take care of a (false positive) warning I'm getting:
> drivers/net/dsa/b53/b53_mmap.c: In function 'b53_mmap_read64':
> drivers/net/dsa/b53/b53_mmap.c:109:10: error: 'hi' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> *val = ((u64)hi << 32) | lo;
> I originally planned to submit another patch for that warning
> and did this one as a preparation cleanup, but it does seem to be
> sufficient by itself.
> Signed-off-by: Arnd Bergmann <>

Acked-by: Florian Fainelli <>

 \ /
  Last update: 2016-06-16 20:21    [W:0.025 / U:23.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site