[PATCH] drm/imx/dcss: Fix clock leak on blkctl init failure

[laixiangwu]

dcss_submodules_init() enables the DCSS clocks before initializing the
submodules, but if the first submodule (blkctl) fails to initialize the
function returns directly, without disabling the clocks again. All the
later error paths already jump to ctxld_err, which calls
dcss_clocks_disable().

Since the clocks are only devm-managed for their reference (devm_clk_get),
a blkctl init failure leaves all five DCSS clocks prepared and enabled.

Jump to ctxld_err so the clocks are disabled like on the other error
paths.

Fixes: 9021c317b770 ("drm/imx: Add initial support for DCSS on iMX8MQ")
Signed-off-by: laixiangwu <laixiangwu at cmss.chinamobile.com>
---
 drivers/gpu/drm/imx/dcss/dcss-dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/imx/dcss/dcss-dev.c b/drivers/gpu/drm/imx/dcss/dcss-dev.c
index 7fd0c4c14..551786060 100644
--- a/drivers/gpu/drm/imx/dcss/dcss-dev.c
+++ b/drivers/gpu/drm/imx/dcss/dcss-dev.c
@@ -70,7 +70,7 @@ static int dcss_submodules_init(struct dcss_dev *dcss)
 
 	ret = dcss_blkctl_init(dcss, base_addr + devtype->blkctl_ofs);
 	if (ret)
-		return ret;
+		goto ctxld_err;
 
 	ret = dcss_ctxld_init(dcss, base_addr + devtype->ctxld_ofs);
 	if (ret)