media: bcm2835-unicam: Correctly handle error propagation for stream on

raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

On a failure in start_streaming(), the error code would not propagate to
the calling function on all conditions. This would cause the userland
caller to not know of the failure.
Signed-off-by: NNaushir Patuck <naush@raspberrypi.com>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/media/platform/bcm2835/bcm2835-unicam.c

@@ -1730,8 +1730,7 @@ static int unicam_start_streaming(struct vb2_queue *vq, unsigned int count)
 	unicam_disable(dev);
 	clk_disable_unprepare(dev->clock);
 err_vpu_clock:
-	ret = clk_set_min_rate(dev->vpu_clock, 0);
-	if (ret)
+	if (clk_set_min_rate(dev->vpu_clock, 0))
 		unicam_err(dev, "failed to reset the VPU clock\n");
 	clk_disable_unprepare(dev->vpu_clock);
 err_pm_put: