Messages in this thread Patch in this message | | | From | Johan Hovold <> | Subject | [PATCH 1/2] Input: usbtouchscreen - suppress empty array warnings | Date | Mon, 20 Jun 2022 10:46:27 +0200 |
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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.
Signed-off-by: Johan Hovold <johan@kernel.org> --- drivers/input/touchscreen/usbtouchscreen.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c index 43c521f50c85..6683554f0e92 100644 --- a/drivers/input/touchscreen/usbtouchscreen.c +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -128,6 +128,7 @@ enum { DEVTYPE_NEXIO, DEVTYPE_ELO, DEVTYPE_ETOUCH, + DEVTYPE_COUNT }; #define USB_DEVICE_HID_CLASS(vend, prod) \ @@ -1379,6 +1380,7 @@ static struct usbtouch_device_info usbtouch_dev_info[] = { .read_data = etouch_read_data, }, #endif + [DEVTYPE_COUNT] = { } /* Make sure array is non-empty */ }; -- 2.35.1
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