Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Tony Lindgren <tony@atomide.com>
To:     Tomi Valkeinen <tomba@kernel.org>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>
Cc:     Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Sebastian Reichel <sre@kernel.org>,
        dri-devel@lists.freedesktop.org, linux-omap@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH] drm/omap: dsi: Fix deferred probe warnings
Date:   Wed, 12 Apr 2023 10:39:53 +0300
Message-Id: <20230412073954.20601-1-tony@atomide.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

We may not have dsi->dsidev initialized during probe, and that can
lead into various dsi related warnings as omap_dsi_host_detach() gets
called with dsi->dsidev set to NULL.

The warnings can be "Fixed dependency cycle(s)" followed by a
WARNING: CPU: 0 PID: 787 at drivers/gpu/drm/omapdrm/dss/dsi.c:4414.

Let's fix the warnings by checking for a valid dsi->dsidev.

Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/gpu/drm/omapdrm/dss/dsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
--- a/drivers/gpu/drm/omapdrm/dss/dsi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -4411,7 +4411,7 @@ static int omap_dsi_host_detach(struct mipi_dsi_host *host,
 {
 	struct dsi_data *dsi = host_to_omap(host);
 
-	if (WARN_ON(dsi->dsidev != client))
+	if (dsi->dsidev && WARN_ON(dsi->dsidev != client))
 		return -EINVAL;
 
 	cancel_delayed_work_sync(&dsi->dsi_disable_work);
-- 
2.40.0