lkml.org 
[lkml]   [2013]   [May]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v3] pinctrl: move subsystem mutex to pinctrl_dev struct
From
On Fri, May 24, 2013 at 5:22 PM, James Hogan <james.hogan@imgtec.com> wrote:
> On 26 April 2013 16:08, Linus Walleij <linus.walleij@stericsson.com> wrote:
>> @@ -608,7 +610,7 @@ static int pinconf_dbg_config_print(struct seq_file *s, void *d)
>> bool found = false;
>> unsigned long config;
>>
>> - mutex_lock(&pinctrl_mutex);
>> + mutex_lock(&pctldev->mutex);
>>
>> /* Parse the pinctrl map and look for the elected pin/state */
>> for_each_maps(maps_node, i, map) {
>
> This change causes an oops on v3.10-rc2 when you read pinconf-config
> because pctldev is initialised to NULL and not set until inside the
> loop.

It is taking the wrong mutex. The function right below it is
also iterating the maps, and then it shall take the maps
mutex and nothing else.

I just sent a patch fixing it up.

> If this debugfs file
> isn't meant to be specific to a pinctrl device should it be in the
> root pinctrl directory instead of in each pinctrl device's directory?

Yes. We need to fix this after this immediate fixup, for the next
merge window.

Yours,
Linus Walleij


\
 
 \ /
  Last update: 2013-05-27 16:21    [W:0.068 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site