From: owen Date: Mon, 17 Jan 2022 10:09:49 +0000 (+0800) Subject: drm/bridge: anx7625: Return -EPROBE_DEFER if the dsi host was not found X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=269332997a160b3785690a32d2c5496bce7dae51;p=linux.git drm/bridge: anx7625: Return -EPROBE_DEFER if the dsi host was not found It will connect to the mipi dsi host and find the corresponding mipi dsi host node, but the node registered by the mipi dsi host has not been loaded yet. of_find_mipi_dsi_host_by_node() returns -EINVAL which causes the calling driver to fail. If the anx7625 driver is loaded afterwards the driver requesting the mipi dsi host will not notice this. Better approach is to return -EPROBE_DEFER in such case. Then when the anx7625 driver appears the driver requesting the mipi dsi host will be probed again. Signed-off-by: owen Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20220117100949.9542-1-qwt9588@gamil.com Reviewed-by: Robert Foss --- diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 0528c3c6168db..76662fce4ce61 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -1917,7 +1917,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx) host = of_find_mipi_dsi_host_by_node(ctx->pdata.mipi_host_node); if (!host) { DRM_DEV_ERROR(dev, "fail to find dsi host.\n"); - return -EINVAL; + return -EPROBE_DEFER; } dsi = devm_mipi_dsi_device_register_full(dev, host, &info);