Hi Ryan
On Mon, Aug 13, 2012 at 2:04 AM, Ryan Mallon <rmallon@xxxxxxxxx> wrote:
> On 13/08/12 00:53, David Herrmann wrote:
>> +static ssize_t fblog_dev_active_show(struct device *dev,
>> + struct device_attribute *attr,
>> + char *buf)
>> +{
>> + struct fblog_fb *fb = to_fblog_dev(dev);
>> +
>> + return snprintf(buf, PAGE_SIZE, "%d\n",
>> + !!test_bit(FBLOG_OPEN, &fb->flags));
>
> Nitpick. sprintf is okay here, %d is rarely longer than PAGE_SIZE :-).
>
>> +}
>> +
>> +static ssize_t fblog_dev_active_store(struct device *dev,
>> + struct device_attribute *attr,
>> + const char *buf,
>> + size_t count)
>> +{
>> + struct fblog_fb *fb = to_fblog_dev(dev);
>> + unsigned long num;
>> + int ret = 0;
>> +
>> + num = simple_strtoul(buf, NULL, 10);
>
> kstrtoul is preferred these days I think, it also catches errors.
>
>> +
>> + mutex_lock(&fb->info->lock);
>> + if (num)
>> + ret = fblog_open(fb);
>> + else
>> + fblog_close(fb, false);
>> + mutex_unlock(&fb->info->lock);
>> +
>> + return ret ? ret : count;
>
> Nitpick, you can use gcc's shortcut form of the ? operator here:
>
> return ret ?: count;
>
>> @@ -186,7 +228,20 @@ static void fblog_do_register(struct fb_info *info, bool force)
>> return;
>> }
>>
>> - fblog_open(fb);
>> + ret = device_create_file(&fb->dev, &dev_attr_active);
>> + if (ret) {
>> + pr_err("fblog: cannot create sysfs entry");
>
> Shouldn't need the "fblog: " prefix, since you have pr_fmt defined.
>
>> + /* do not open fb if we cannot create control file */
>> + do_open = false;
>> + }
>> +
>> + if (!activate_on_hotplug)
>> + do_open = false;
>> + if (main_only && info->node != 0)
>> + do_open = false;
>> +
>> + if (do_open)
>> + fblog_open(fb);
>> }
>>
>> static void fblog_register(struct fb_info *info, bool force)
All four fixes make sense, thanks!
David
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