[PATCH] drm/exynos: fimd: fix clock leak on resume error path

[Jiawen Liu]

From: jiawen <1298662399 at qq.com>

exynos_fimd_resume() can fail when clk_prepare_enable() succeeds for
bus_clk but fails for lcd_clk. The function returns the error without
disabling bus_clk, leaving it prepared and enabled.

Disable bus_clk before returning the error to keep the clock state
balanced.

Signed-off-by: jiawen <1298662399 at qq.com>
---
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -1325,6 +1325,7 @@
 		DRM_DEV_ERROR(dev,
 			      "Failed to prepare_enable the lcd clk [%d]\n",
 			      ret);
+		clk_disable_unprepare(ctx->bus_clk);
 		return ret;
 	}