Am Samstag, den 13.11.2010, 06:39 -0800 schrieb Greg KH: > On Fri, Nov 12, 2010 at 10:06:34PM -0800, Dmitry Torokhov wrote: > > On Fri, Nov 12, 2010 at 04:52:32PM -0800, Greg KH wrote: > > > On Fri, Nov 12, 2010 at 04:21:45PM -0800, Eric Biederman wrote: > > > > On Fri, Nov 12, 2010 at 10:18 AM, Stefan Achatz <stefan_achatz@xxxxxx> wrote: > > > > > hid-roccat-kone now uses new group functions for creating binary > > > > > sysfs attributes. > > > > > > > > Looking at this, I have a problem with the way this works. > > > > You are still doing this the hard and racy way. > > > > > > > > sysfs attributes that are only added when we initialize the hardware and > > > > are only removed when we remove the driver should use the device layer > > > > functions to create their attributes. > > > > > > > > This achieves two things. The code is easier to write because there > > > > is less of it. > > > > The notification to user space happens after the attributes appear so > > > > that you don't > > > > have strange hotplug races. > > > > > > > > If there a chance you can look at implementing this in the simpler > > > > race free way? > > > > > > Good point, just attach this attribute group to the device and the > > > driver core will automatically create the files for you. > > > > > > > Attribute group in device structure is normally owned and managed by > > subsystem core; without additional plumbing drivers should not be > > touching it, at least not normally. > > > > Plus we do not have binary attribute group in device structure [yet]. > > In thinking about it a bit more, why do you have so many binary > attributes for this driver? binary sysfs files are rare, so adding a > binary attribute group pointer to the device or driver would just waste > a lot of space that no one else uses. > > What are these binary files for? Who uses them? I don't seem to be > able to find them in the Documentation/ABI directory, or am I missing > something here? Documentation/ABI/testing/sysfs-driver-hid-roccat-kone Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
