drm/mipi-dsi: Detach devices when removing the host

[ Upstream commit 668a8f17b5290d04ef7343636a5588a0692731a1 ]

Whenever the MIPI-DSI host is unregistered, the code of
mipi_dsi_host_unregister() loops over every device currently found on that
bus and will unregister it.

However, it doesn't detach it from the bus first, which leads to all kind
of resource leaks if the host wants to perform some clean up whenever a
device is detached.

Fixes: 068a00233969 ("drm: Add MIPI DSI bus support")
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20220711173939.1132294-2-maxime@cerno.tech
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 6f0de951b75d53a4d6a415c889b51a72473d53f8..bd5e8661f826a596c99f191298bb948da9a503d7 100644 (file)
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -305,6 +305,7 @@ static int mipi_dsi_remove_device_fn(struct device *dev, void *priv)
 {
        struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
 
+       mipi_dsi_detach(dsi);
        mipi_dsi_device_unregister(dsi);
 
        return 0;