From 03006bd0880ad23600eff76f7c6b7eb8c87fe3d7 Mon Sep 17 00:00:00 2001 From: Rui Miguel Silva Date: Tue, 30 Apr 2019 18:25:23 -0400 Subject: [PATCH] media: imx7_mipi_csis: fix racy entity pads init Setting the media entity pads after the async register subdev can be racy with probe complete callback. So, make sure that the media pads are initialized before the probe complete is called. For that move the media entity pads initialization to the registered subdev internal operation. Signed-off-by: Rui Miguel Silva Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/imx/imx7-mipi-csis.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c index 19455f4..042837b 100644 --- a/drivers/staging/media/imx/imx7-mipi-csis.c +++ b/drivers/staging/media/imx/imx7-mipi-csis.c @@ -784,6 +784,17 @@ static irqreturn_t mipi_csis_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } +static int mipi_csis_registered(struct v4l2_subdev *mipi_sd) +{ + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd); + + state->pads[CSIS_PAD_SINK].flags = MEDIA_PAD_FL_SINK; + state->pads[CSIS_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE; + + return media_entity_pads_init(&state->mipi_sd.entity, CSIS_PADS_NUM, + state->pads); +} + static const struct v4l2_subdev_core_ops mipi_csis_core_ops = { .log_status = mipi_csis_log_status, }; @@ -809,6 +820,10 @@ static const struct v4l2_subdev_ops mipi_csis_subdev_ops = { .pad = &mipi_csis_pad_ops, }; +static const struct v4l2_subdev_internal_ops mipi_csis_internal_ops = { + .registered = mipi_csis_registered, +}; + static int mipi_csis_parse_dt(struct platform_device *pdev, struct csi_state *state) { @@ -869,6 +884,7 @@ static int mipi_csis_subdev_init(struct v4l2_subdev *mipi_sd, mipi_sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE; mipi_sd->entity.ops = &mipi_csis_entity_ops; + mipi_sd->internal_ops = &mipi_csis_internal_ops; mipi_sd->dev = &pdev->dev; @@ -990,13 +1006,6 @@ static int mipi_csis_probe(struct platform_device *pdev) if (ret < 0) goto disable_clock; - state->pads[CSIS_PAD_SINK].flags = MEDIA_PAD_FL_SINK; - state->pads[CSIS_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE; - ret = media_entity_pads_init(&state->mipi_sd.entity, CSIS_PADS_NUM, - state->pads); - if (ret < 0) - goto unregister_subdev; - memcpy(state->events, mipi_csis_events, sizeof(state->events)); mipi_csis_debugfs_init(state); @@ -1016,7 +1025,6 @@ static int mipi_csis_probe(struct platform_device *pdev) unregister_all: mipi_csis_debugfs_exit(state); media_entity_cleanup(&state->mipi_sd.entity); -unregister_subdev: v4l2_async_unregister_subdev(&state->mipi_sd); disable_clock: mipi_csis_clk_disable(state); -- 2.7.4