On Mon, 20 Feb 2017, Sudip Mukherjee wrote: > On Sun, Feb 19, 2017 at 08:26:18AM +0000, Daniel Thompson wrote: > > On Sat, Feb 18, 2017 at 04:31:43PM +0000, Sudip Mukherjee wrote: > > > On Monday 30 January 2017 11:04 PM, Sudip Mukherjee wrote: > > > > On Wednesday 18 January 2017 09:23 PM, Sudip Mukherjee wrote: > > > > > It is possible to update the backlight power and the brightness using > > > > > the sysfs and on writing it either returns the count or if the callback > > > > > function does not exist then returns the error code 'ENXIO'. > > > > > > > > > > We have a situation where the userspace client is writing to the sysfs > > > > > to update the power and since the callback function exists the client > > > > > receives the return value as count and considers the operation to be > > > > > successful. That is correct as the write to the sysfs was successful. > > > > > But there is no way to know if the actual operation was done or not. > > > > > > > > > > backlight_update_status() returns the error code if it fails. Pass that > > > > > to the userspace client who is trying to update the power so that the > > > > > client knows that the operation failed. > > > > > > > > > > Signed-off-by: Sudip Mukherjee <sudip.mukherjee@xxxxxxxxxxxxxxx> > > > > > --- > > > > > > > > A gentle ping. > > > > > > Hi Andrew, > > > > > > Its more than one month now that this patch was submitted. Can you please > > > take it through your tree... else it will miss the merge window. > > > > Sorry you've been waiting so long for a review. Your "gentle ping" did > > result in a few minor tweaks to the maintainers but what it didn't > > (until today) provoke was review! > > what tweaks? I can see that now you are the new maintainer.Is that the > result of my ping? :) Pings never have any effect and are thus always discouraged. ;) The amount of pending reviews on Backlight patches were what provoked me to find a new, diligent Maintainer for the subsystem. -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
