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Reduce code duplication and simplify error handling in drivers. Signed-off-by: Frank Li --- drivers/media/v4l2-core/v4l2-async.c | 30 ++++++++++++++++++++++++++++++ include/media/v4l2-async.h | 18 ++++++++++++++++++ 2 files changed, 48 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core= /v4l2-async.c index 1c08bba9ecb91f46b7479da613d6c1688d4b0b5c..65e4aa46372a02f9ddc04571436= f46c90259e200 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -19,6 +19,7 @@ #include #include =20 +#include #include #include #include @@ -881,6 +882,35 @@ int __v4l2_async_register_subdev(struct v4l2_subdev *s= d, struct module *module) } EXPORT_SYMBOL(__v4l2_async_register_subdev); =20 +int __v4l2_async_pad_init_and_register_subdev(struct v4l2_subdev *sd, + u16 num_pads, + struct media_pad *pads, + struct module *module) +{ + int ret; + + ret =3D media_entity_pads_init(&sd->entity, num_pads, pads); + if (ret) + return ret; + + ret =3D v4l2_subdev_init_finalize(sd); + if (ret) + goto err_entity_cleanup; + + ret =3D __v4l2_async_register_subdev(sd, module); + if (ret) + goto err_subdev_cleanup; + + return 0; + +err_subdev_cleanup: + v4l2_subdev_cleanup(sd); +err_entity_cleanup: + media_entity_cleanup(&sd->entity); + return ret; +} +EXPORT_SYMBOL(__v4l2_async_pad_init_and_register_subdev); + void v4l2_async_unregister_subdev(struct v4l2_subdev *sd) { struct v4l2_async_connection *asc, *asc_tmp; diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h index f26c323e9c963065fd7c19d6d9835df1194bc069..81f1f418a246902178d5fa8f9d5= e48b14301386f 100644 --- a/include/media/v4l2-async.h +++ b/include/media/v4l2-async.h @@ -336,6 +336,24 @@ int __v4l2_async_register_subdev(struct v4l2_subdev *s= d, struct module *module); int __must_check v4l2_async_register_subdev_sensor(struct v4l2_subdev *sd); =20 +struct media_pad; +int __must_check +__v4l2_async_pad_init_and_register_subdev(struct v4l2_subdev *sd, u16 num_= pads, + struct media_pad *pads, + struct module *module); +/** + * v4l2_async_pad_init_and_register_subdev - Initialize the entity pads and + * registers a sub-device to the + * asynchronous subdevice framework + * @sd: pointer to &struct v4l2_subdev + * @num_pads: total number of sink and source pads + * @pads: Array of @num_pads pads. + * + * Returns an error on failure, 0 on success. + */ +#define v4l2_async_pad_init_and_register_subdev(sd, num_pads, pads) \ + __v4l2_async_pad_init_and_register_subdev(sd, num_pads, pads, \ + THIS_MODULE) /** * v4l2_async_unregister_subdev - unregisters a sub-device to the asynchro= nous * subdevice framework --=20 2.43.0 From nobody Thu Apr 2 15:44:06 2026 Received: from MRWPR03CU001.outbound.protection.outlook.com (mail-francesouthazon11011067.outbound.protection.outlook.com [40.107.130.67]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B587334C36; 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No functional changes. Signed-off-by: Frank Li --- drivers/media/platform/synopsys/dw-mipi-csi2rx.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/drivers/media/platform/synopsys/dw-mipi-csi2rx.c b/drivers/med= ia/platform/synopsys/dw-mipi-csi2rx.c index 5dc55b59d6aeed4b6cb207c8e2ebe0fb3c462644..64ad7ac62c085400e2544cceb91= cfa55c66910bd 100644 --- a/drivers/media/platform/synopsys/dw-mipi-csi2rx.c +++ b/drivers/media/platform/synopsys/dw-mipi-csi2rx.c @@ -681,15 +681,10 @@ static int dw_mipi_csi2rx_register(struct dw_mipi_csi= 2rx_device *csi2) pads[DW_MIPI_CSI2RX_PAD_SINK].flags =3D MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT; pads[DW_MIPI_CSI2RX_PAD_SRC].flags =3D MEDIA_PAD_FL_SOURCE; - ret =3D media_entity_pads_init(&sd->entity, DW_MIPI_CSI2RX_PAD_MAX, pads); - if (ret) - goto err_notifier_unregister; - - ret =3D v4l2_subdev_init_finalize(sd); - if (ret) - goto err_entity_cleanup; =20 - ret =3D v4l2_async_register_subdev(sd); + ret =3D v4l2_async_pad_init_and_register_subdev(sd, + DW_MIPI_CSI2RX_PAD_MAX, + pads); 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No functional changes. Signed-off-by: Frank Li --- build test only --- drivers/media/platform/cadence/cdns-csi2rx.c | 18 ++++-------------- 1 file changed, 4 insertions(+), 14 deletions(-) diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/p= latform/cadence/cdns-csi2rx.c index 8c19f125da3e50f55a0ae280b05e7918ce115101..1a18a9d0ea602c91c07a4bf4573= ec0346edc7650 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -855,11 +855,6 @@ static int csi2rx_probe(struct platform_device *pdev) csi2rx->subdev.flags |=3D V4L2_SUBDEV_FL_HAS_DEVNODE; csi2rx->subdev.entity.ops =3D &csi2rx_media_ops; =20 - ret =3D media_entity_pads_init(&csi2rx->subdev.entity, CSI2RX_PAD_MAX, - csi2rx->pads); - if (ret) - goto err_cleanup; - csi2rx->error_irq =3D platform_get_irq_byname_optional(pdev, "error_irq"); =20 if (csi2rx->error_irq < 0) { @@ -875,13 +870,11 @@ static int csi2rx_probe(struct platform_device *pdev) } } =20 - ret =3D v4l2_subdev_init_finalize(&csi2rx->subdev); - if (ret) - goto err_cleanup; - - ret =3D v4l2_async_register_subdev(&csi2rx->subdev); + ret =3D v4l2_async_pad_init_and_register_subdev(&csi2rx->subdev, + CSI2RX_PAD_MAX, + csi2rx->pads); if (ret < 0) - goto err_free_state; + goto err_cleanup; =20 dev_info(&pdev->dev, "Probed CSI2RX with %u/%u lanes, %u streams, %s D-PHY\n", @@ -891,12 +884,9 @@ static int csi2rx_probe(struct platform_device *pdev) =20 return 0; =20 -err_free_state: - v4l2_subdev_cleanup(&csi2rx->subdev); err_cleanup: v4l2_async_nf_unregister(&csi2rx->notifier); v4l2_async_nf_cleanup(&csi2rx->notifier); - media_entity_cleanup(&csi2rx->subdev.entity); err_free_priv: kfree(csi2rx); return ret; --=20 2.43.0