drm/stm: Fix an error handling path in stm_drm_platform_probe()

[ Upstream commit ce7c90bfda2656418c69ba0dd8f8a7536b8928d4 ]

If drm_dev_register() fails, a call to drv_load() must be undone, as
already done in the remove function.

Fixes: b759012c5fa7 ("drm/stm: Add STM32 LTDC driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20fff7f853f20a48a96db8ff186124470ec4d976.1704560028.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c
index e8523abef27a5062b3dfe8f69a0bb21ff7957641..4d2db079ad4ff37c0d0d75e0d16c792788595868 100644 (file)
--- a/drivers/gpu/drm/stm/drv.c
+++ b/drivers/gpu/drm/stm/drv.c
@@ -203,12 +203,14 @@ static int stm_drm_platform_probe(struct platform_device *pdev)
 
        ret = drm_dev_register(ddev, 0);
        if (ret)
-               goto err_put;
+               goto err_unload;
 
        drm_fbdev_dma_setup(ddev, 16);
 
        return 0;
 
+err_unload:
+       drv_unload(ddev);
 err_put:
        drm_dev_put(ddev);