media: platform: stm32: Add check for clk_enable()

Add check for the return value of clk_enable() to gurantee the success.

Fixes: 002e8f0d59 ("media: stm32-dma2d: STM32 DMA2D driver")
Cc: stable@vger.kernel.org
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

drivers/media/platform/st/stm32/dma2d/dma2d.c

@@ -490,7 +490,8 @@ static void device_run(void *prv)
 	dst->sequence = frm_cap->sequence++;
 	v4l2_m2m_buf_copy_metadata(src, dst, true);
 
-	clk_enable(dev->gate);
+	if (clk_enable(dev->gate))
+		goto end;
 
 	dma2d_config_fg(dev, frm_out,
 			vb2_dma_contig_plane_dma_addr(&src->vb2_buf, 0));