On Wednesday, June 11, 2014 5:58 AM, Tomasz Figa wrote:
If there is no panel node in DT and instead display timings are provided directly in FIMD node, there is no panel object created and ctx->panel becomes NULL. However during Exynos DRM initialization drm_helper_hpd_irq_event() is called, which in turns calls exynos_dpi_detect(), which dereferences ctx->panel without a check, causing a NULL pointer derefrence.
This patch fixes the issue by adding necessary NULL pointer check.
Signed-off-by: Tomasz Figa tomasz.figa@gmail.com
(+cc Inki Dae)
Reviewed-by: Jingoo Han jg1.han@samsung.com
Best regards, Jingoo Han
drivers/gpu/drm/exynos/exynos_drm_dpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dpi.c b/drivers/gpu/drm/exynos/exynos_drm_dpi.c index f1b8587..f44bd90 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dpi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dpi.c @@ -40,7 +40,7 @@ exynos_dpi_detect(struct drm_connector *connector, bool force) { struct exynos_dpi *ctx = connector_to_dpi(connector);
- if (!ctx->panel->connector)
if (ctx->panel && !ctx->panel->connector) drm_panel_attach(ctx->panel, &ctx->connector);
return connector_status_connected;
--