leds: lp5523: check return value of lp5xx_read and jump to cleanup code

Check return value of lp5xx_read and if non-zero, jump to code at end of
the function, causing lp5523_stop_all_engines to be executed before
returning the error value up the call chain. This fixes the original
commit (248b5701) which was reverted due to the University of Minnesota
problems.

Cc: stable <stable@vger.kernel.org>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210503115736.2104747-10-gregkh@linuxfoundation.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/leds/leds-lp5523.c

@@ -305,7 +305,9 @@ static int lp5523_init_program_engine(struct lp55xx_chip *chip)
 
 	/* Let the programs run for couple of ms and check the engine status */
 	usleep_range(3000, 6000);
-	lp55xx_read(chip, LP5523_REG_STATUS, &status);
+	ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
+	if (ret)
+		goto out;
 	status &= LP5523_ENG_STATUS_MASK;
 
 	if (status != LP5523_ENG_STATUS_MASK) {