drm/msm/dsi: Fix missing put_device() call in dsi_get_phy

BugLink: https://bugs.launchpad.net/bugs/1959879
commit c04c3148ca12227d92f91b355b4538cc333c9922 upstream.

If of_find_device_by_node() succeeds, dsi_get_phy() doesn't
a corresponding put_device(). Thus add put_device() to fix the exception
handling.

Fixes: ec31abf ("drm/msm/dsi: Separate PHY to another platform device")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211230070943.18116-1-linmq006@gmail.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
index fc280cc4349437f0b21b452542cb5019c5233d60..122fadcf7cc1ec251193b156ee490dfdc298bb6d 100644 (file)
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -40,7 +40,12 @@ static int dsi_get_phy(struct msm_dsi *msm_dsi)
 
        of_node_put(phy_node);
 
-       if (!phy_pdev || !msm_dsi->phy) {
+       if (!phy_pdev) {
+               DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
+               return -EPROBE_DEFER;
+       }
+       if (!msm_dsi->phy) {
+               put_device(&phy_pdev->dev);
                DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
                return -EPROBE_DEFER;
        }