Hi Johan, On Mon, Jun 20, 2022 at 10:46:27AM +0200, Johan Hovold wrote: > When compile-testing the USB touchscreen driver without enabling any of > the device type options the usbtouch_dev_info array ends up being empty, > something which triggers compiler warning with -Warray-bounds > (gcc-11.3.0). > > drivers/input/touchscreen/usbtouchscreen.c: In function 'usbtouch_probe': > drivers/input/touchscreen/usbtouchscreen.c:1668:16:warning: array subscript <unknown> is outside array bounds of 'struct usbtouch_device_info[0]' [-Warray-bounds] > 1668 | type = &usbtouch_dev_info[id->driver_info]; > > Suppress the warnings by making sure that the array is always non-empty. Does it still warn if you add a check for type, something like if (type >= ARRAY_SIZE(usbtouch_device_info)) return -ENODEV; ? Thanks. -- Dmitry
