fbdev: au1100fb: Check return value of clk_enable() in .resume()

Check the return value of clk_enable() in au1100fb_drv_resume() and
return the error on failure.
This ensures the system is aware of the resume failure and can track
its state accurately.

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Helge Deller <deller@gmx.de>

Author: Chen Ni

drivers/video/fbdev/au1100fb.c

@@ -567,13 +567,16 @@ int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
 int au1100fb_drv_resume(struct platform_device *dev)
 {
 	struct au1100fb_device *fbdev = platform_get_drvdata(dev);
+	int ret;
 
 	if (!fbdev)
 		return 0;
 
 	memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 
-	clk_enable(fbdev->lcdclk);
+	ret = clk_enable(fbdev->lcdclk);
+	if (ret)
+		return ret;
 
 	/* Unblank the LCD */
 	au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);