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[RESEND] drm/msm/mdp5: Fix mdp5_cfg_init error return

Message ID 20190521150030.13609-1-jeffrey.l.hugo@gmail.com (mailing list archive)
State New, archived
Headers show
Series [RESEND] drm/msm/mdp5: Fix mdp5_cfg_init error return | expand

Commit Message

Jeffrey Hugo May 21, 2019, 3 p.m. UTC 
If mdp5_cfg_init fails because of an unknown major version, a null pointer
dereference occurs.  This is because the caller of init expects error
pointers, but init returns NULL on error.  Fix this by returning the
expected values on error.

Fixes: 2e362e1772b8 (drm/msm/mdp5: introduce mdp5_cfg module)
Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c
index ea8f7d7daf7f..52e23780fce1 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c
@@ -721,7 +721,7 @@  struct mdp5_cfg_handler *mdp5_cfg_init(struct mdp5_kms *mdp5_kms,
 	if (cfg_handler)
 		mdp5_cfg_destroy(cfg_handler);
 
-	return NULL;
+	return ERR_PTR(ret);
 }
 
 static struct mdp5_cfg_platform *mdp5_get_config(struct platform_device *dev)