In fsl_tcon_init(), when of_clk_get_by_name() succeeds but clk_prepare_enable() fails, the function jumps to err_node_put label without releasing the clock reference obtained. This causes a clock reference leak.

Fix by calling clk_put() that properly releases the clock reference.

Found via static analysis and code review.

Fixes: fb127b7943c9 ("drm/fsl-dcu: add TCON driver") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin linmq006@gmail.com --- drivers/gpu/drm/fsl-dcu/fsl_tcon.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_tcon.c b/drivers/gpu/drm/fsl-dcu/fsl_tcon.c index 49bbd00c77ae..b7ba90814b0e 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_tcon.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_tcon.c @@ -86,7 +86,7 @@ struct fsl_tcon *fsl_tcon_init(struct device *dev) ret = clk_prepare_enable(tcon->ipg_clk); if (ret) { dev_err(dev, "Couldn't enable the TCON clock\n"); - goto err_node_put; + goto err_clk_put; }

of_node_put(np); @@ -94,6 +94,8 @@ struct fsl_tcon *fsl_tcon_init(struct device *dev)

return tcon;

+err_clk_put: + clk_put(tcon->ipg_clk); err_node_put: of_node_put(np); return NULL;