From: Laurent Pinchart <laurent.pinch...@ideasonboard.com> The async subdev notifier .bound(), .unbind() and .complete() operations are function pointers stored directly in the v4l2_async_subdev structure. As the structure isn't immutable, this creates a potential security risk as the function pointers are mutable.
To fix this, move the function pointers to a new v4l2_async_subdev_operations structure that can be made const in drivers. Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com> Acked-by: Hans Verkuil <hans.verk...@cisco.com> --- drivers/media/platform/am437x/am437x-vpfe.c | 8 +++++-- drivers/media/platform/atmel/atmel-isc.c | 10 ++++++--- drivers/media/platform/atmel/atmel-isi.c | 10 ++++++--- drivers/media/platform/davinci/vpif_capture.c | 8 +++++-- drivers/media/platform/davinci/vpif_display.c | 8 +++++-- drivers/media/platform/exynos4-is/media-dev.c | 8 +++++-- drivers/media/platform/omap3isp/isp.c | 6 +++++- drivers/media/platform/pxa_camera.c | 8 +++++-- drivers/media/platform/qcom/camss-8x16/camss.c | 8 +++++-- drivers/media/platform/rcar-vin/rcar-core.c | 10 ++++++--- drivers/media/platform/rcar_drif.c | 10 ++++++--- drivers/media/platform/soc_camera/soc_camera.c | 14 +++++++------ drivers/media/platform/stm32/stm32-dcmi.c | 10 ++++++--- drivers/media/platform/ti-vpe/cal.c | 8 +++++-- drivers/media/platform/xilinx/xilinx-vipp.c | 8 +++++-- drivers/media/v4l2-core/v4l2-async.c | 20 +++++++++--------- drivers/staging/media/imx/imx-media-dev.c | 8 +++++-- include/media/v4l2-async.h | 29 +++++++++++++++++--------- 18 files changed, 131 insertions(+), 60 deletions(-) diff --git a/drivers/media/platform/am437x/am437x-vpfe.c b/drivers/media/platform/am437x/am437x-vpfe.c index dfcc484cab89..0997c640191d 100644 --- a/drivers/media/platform/am437x/am437x-vpfe.c +++ b/drivers/media/platform/am437x/am437x-vpfe.c @@ -2417,6 +2417,11 @@ static int vpfe_async_complete(struct v4l2_async_notifier *notifier) return vpfe_probe_complete(vpfe); } +static const struct v4l2_async_notifier_operations vpfe_async_ops = { + .bound = vpfe_async_bound, + .complete = vpfe_async_complete, +}; + static struct vpfe_config * vpfe_get_pdata(struct platform_device *pdev) { @@ -2590,8 +2595,7 @@ static int vpfe_probe(struct platform_device *pdev) vpfe->notifier.subdevs = vpfe->cfg->asd; vpfe->notifier.num_subdevs = ARRAY_SIZE(vpfe->cfg->asd); - vpfe->notifier.bound = vpfe_async_bound; - vpfe->notifier.complete = vpfe_async_complete; + vpfe->notifier.ops = &vpfe_async_ops; ret = v4l2_async_notifier_register(&vpfe->v4l2_dev, &vpfe->notifier); if (ret) { diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c index d7103c5f92c3..48544c4137cb 100644 --- a/drivers/media/platform/atmel/atmel-isc.c +++ b/drivers/media/platform/atmel/atmel-isc.c @@ -1639,6 +1639,12 @@ static int isc_async_complete(struct v4l2_async_notifier *notifier) return 0; } +static const struct v4l2_async_notifier_operations isc_async_ops = { + .bound = isc_async_bound, + .unbind = isc_async_unbind, + .complete = isc_async_complete, +}; + static void isc_subdev_cleanup(struct isc_device *isc) { struct isc_subdev_entity *subdev_entity; @@ -1851,9 +1857,7 @@ static int atmel_isc_probe(struct platform_device *pdev) list_for_each_entry(subdev_entity, &isc->subdev_entities, list) { subdev_entity->notifier.subdevs = &subdev_entity->asd; subdev_entity->notifier.num_subdevs = 1; - subdev_entity->notifier.bound = isc_async_bound; - subdev_entity->notifier.unbind = isc_async_unbind; - subdev_entity->notifier.complete = isc_async_complete; + subdev_entity->notifier.ops = &isc_async_ops; ret = v4l2_async_notifier_register(&isc->v4l2_dev, &subdev_entity->notifier); diff --git a/drivers/media/platform/atmel/atmel-isi.c b/drivers/media/platform/atmel/atmel-isi.c index 891fa2505efa..eadbf9def358 100644 --- a/drivers/media/platform/atmel/atmel-isi.c +++ b/drivers/media/platform/atmel/atmel-isi.c @@ -1105,6 +1105,12 @@ static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier, return 0; } +static const struct v4l2_async_notifier_operations isi_graph_notify_ops = { + .bound = isi_graph_notify_bound, + .unbind = isi_graph_notify_unbind, + .complete = isi_graph_notify_complete, +}; + static int isi_graph_parse(struct atmel_isi *isi, struct device_node *node) { struct device_node *ep = NULL; @@ -1152,9 +1158,7 @@ static int isi_graph_init(struct atmel_isi *isi) isi->notifier.subdevs = subdevs; isi->notifier.num_subdevs = 1; - isi->notifier.bound = isi_graph_notify_bound; - isi->notifier.unbind = isi_graph_notify_unbind; - isi->notifier.complete = isi_graph_notify_complete; + isi->notifier.ops = &isi_graph_notify_ops; ret = v4l2_async_notifier_register(&isi->v4l2_dev, &isi->notifier); if (ret < 0) { diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c index 0ef36cec21d1..a89367ab1e06 100644 --- a/drivers/media/platform/davinci/vpif_capture.c +++ b/drivers/media/platform/davinci/vpif_capture.c @@ -1500,6 +1500,11 @@ static int vpif_async_complete(struct v4l2_async_notifier *notifier) return vpif_probe_complete(); } +static const struct v4l2_async_notifier_operations vpif_async_ops = { + .bound = vpif_async_bound, + .complete = vpif_async_complete, +}; + static struct vpif_capture_config * vpif_capture_get_pdata(struct platform_device *pdev) { @@ -1691,8 +1696,7 @@ static __init int vpif_probe(struct platform_device *pdev) } else { vpif_obj.notifier.subdevs = vpif_obj.config->asd; vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0]; - vpif_obj.notifier.bound = vpif_async_bound; - vpif_obj.notifier.complete = vpif_async_complete; + vpif_obj.notifier.ops = &vpif_async_ops; err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev, &vpif_obj.notifier); if (err) { diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c index 56fe4e5b396e..ff2f75a328c9 100644 --- a/drivers/media/platform/davinci/vpif_display.c +++ b/drivers/media/platform/davinci/vpif_display.c @@ -1232,6 +1232,11 @@ static int vpif_async_complete(struct v4l2_async_notifier *notifier) return vpif_probe_complete(); } +static const struct v4l2_async_notifier_operations vpif_async_ops = { + .bound = vpif_async_bound, + .complete = vpif_async_complete, +}; + /* * vpif_probe: This function creates device entries by register itself to the * V4L2 driver and initializes fields of each channel objects @@ -1313,8 +1318,7 @@ static __init int vpif_probe(struct platform_device *pdev) } else { vpif_obj.notifier.subdevs = vpif_obj.config->asd; vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0]; - vpif_obj.notifier.bound = vpif_async_bound; - vpif_obj.notifier.complete = vpif_async_complete; + vpif_obj.notifier.ops = &vpif_async_ops; err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev, &vpif_obj.notifier); if (err) { diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c index d4656d5175d7..c15596b56dc9 100644 --- a/drivers/media/platform/exynos4-is/media-dev.c +++ b/drivers/media/platform/exynos4-is/media-dev.c @@ -1405,6 +1405,11 @@ static int subdev_notifier_complete(struct v4l2_async_notifier *notifier) return media_device_register(&fmd->media_dev); } +static const struct v4l2_async_notifier_operations subdev_notifier_ops = { + .bound = subdev_notifier_bound, + .complete = subdev_notifier_complete, +}; + static int fimc_md_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1479,8 +1484,7 @@ static int fimc_md_probe(struct platform_device *pdev) if (fmd->num_sensors > 0) { fmd->subdev_notifier.subdevs = fmd->async_subdevs; fmd->subdev_notifier.num_subdevs = fmd->num_sensors; - fmd->subdev_notifier.bound = subdev_notifier_bound; - fmd->subdev_notifier.complete = subdev_notifier_complete; + fmd->subdev_notifier.ops = &subdev_notifier_ops; fmd->num_sensors = 0; ret = v4l2_async_notifier_register(&fmd->v4l2_dev, diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c index 9a694924e46e..0f08d602f756 100644 --- a/drivers/media/platform/omap3isp/isp.c +++ b/drivers/media/platform/omap3isp/isp.c @@ -2171,6 +2171,10 @@ static int isp_subdev_notifier_complete(struct v4l2_async_notifier *async) return media_device_register(&isp->media_dev); } +static const struct v4l2_async_notifier_operations isp_subdev_notifier_ops = { + .complete = isp_subdev_notifier_complete, +}; + /* * isp_probe - Probe ISP platform device * @pdev: Pointer to ISP platform device @@ -2341,7 +2345,7 @@ static int isp_probe(struct platform_device *pdev) if (ret < 0) goto error_register_entities; - isp->notifier.complete = isp_subdev_notifier_complete; + isp->notifier.ops = &isp_subdev_notifier_ops; ret = v4l2_async_notifier_register(&isp->v4l2_dev, &isp->notifier); if (ret) diff --git a/drivers/media/platform/pxa_camera.c b/drivers/media/platform/pxa_camera.c index edca993c2b1f..9d3f0cb1d95a 100644 --- a/drivers/media/platform/pxa_camera.c +++ b/drivers/media/platform/pxa_camera.c @@ -2221,6 +2221,11 @@ static void pxa_camera_sensor_unbind(struct v4l2_async_notifier *notifier, mutex_unlock(&pcdev->mlock); } +static const struct v4l2_async_notifier_operations pxa_camera_sensor_ops = { + .bound = pxa_camera_sensor_bound, + .unbind = pxa_camera_sensor_unbind, +}; + /* * Driver probe, remove, suspend and resume operations */ @@ -2489,8 +2494,7 @@ static int pxa_camera_probe(struct platform_device *pdev) pcdev->asds[0] = &pcdev->asd; pcdev->notifier.subdevs = pcdev->asds; pcdev->notifier.num_subdevs = 1; - pcdev->notifier.bound = pxa_camera_sensor_bound; - pcdev->notifier.unbind = pxa_camera_sensor_unbind; + pcdev->notifier.ops = &pxa_camera_sensor_ops; if (!of_have_populated_dt()) pcdev->asd.match_type = V4L2_ASYNC_MATCH_I2C; diff --git a/drivers/media/platform/qcom/camss-8x16/camss.c b/drivers/media/platform/qcom/camss-8x16/camss.c index a3760b5dd1d1..390a42c17b66 100644 --- a/drivers/media/platform/qcom/camss-8x16/camss.c +++ b/drivers/media/platform/qcom/camss-8x16/camss.c @@ -601,6 +601,11 @@ static int camss_subdev_notifier_complete(struct v4l2_async_notifier *async) return media_device_register(&camss->media_dev); } +static const struct v4l2_async_notifier_operations camss_subdev_notifier_ops = { + .bound = camss_subdev_notifier_bound, + .complete = camss_subdev_notifier_complete, +}; + static const struct media_device_ops camss_media_ops = { .link_notify = v4l2_pipeline_link_notify, }; @@ -655,8 +660,7 @@ static int camss_probe(struct platform_device *pdev) goto err_register_entities; if (camss->notifier.num_subdevs) { - camss->notifier.bound = camss_subdev_notifier_bound; - camss->notifier.complete = camss_subdev_notifier_complete; + camss->notifier.ops = &camss_subdev_notifier_ops; ret = v4l2_async_notifier_register(&camss->v4l2_dev, &camss->notifier); diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c index bd551f0be213..f55b0ef29a56 100644 --- a/drivers/media/platform/rcar-vin/rcar-core.c +++ b/drivers/media/platform/rcar-vin/rcar-core.c @@ -134,6 +134,12 @@ static int rvin_digital_notify_bound(struct v4l2_async_notifier *notifier, return 0; } +static const struct v4l2_async_notifier_operations rvin_digital_notify_ops = { + .bound = rvin_digital_notify_bound, + .unbind = rvin_digital_notify_unbind, + .complete = rvin_digital_notify_complete, +}; + static int rvin_digital_parse_v4l2(struct device *dev, struct v4l2_fwnode_endpoint *vep, @@ -182,9 +188,7 @@ static int rvin_digital_graph_init(struct rvin_dev *vin) to_of_node( vin->notifier.subdevs[0]->match.fwnode.fwnode)); - vin->notifier.bound = rvin_digital_notify_bound; - vin->notifier.unbind = rvin_digital_notify_unbind; - vin->notifier.complete = rvin_digital_notify_complete; + vin->notifier.ops = &rvin_digital_notify_ops; ret = v4l2_async_notifier_register(&vin->v4l2_dev, &vin->notifier); if (ret < 0) { vin_err(vin, "Notifier registration failed\n"); diff --git a/drivers/media/platform/rcar_drif.c b/drivers/media/platform/rcar_drif.c index 522364ff0d5d..0b2214d6d621 100644 --- a/drivers/media/platform/rcar_drif.c +++ b/drivers/media/platform/rcar_drif.c @@ -1185,6 +1185,12 @@ static int rcar_drif_notify_complete(struct v4l2_async_notifier *notifier) return ret; } +static const struct v4l2_async_notifier_operations rcar_drif_notify_ops = { + .bound = rcar_drif_notify_bound, + .unbind = rcar_drif_notify_unbind, + .complete = rcar_drif_notify_complete, +}; + /* Read endpoint properties */ static void rcar_drif_get_ep_properties(struct rcar_drif_sdr *sdr, struct fwnode_handle *fwnode) @@ -1347,9 +1353,7 @@ static int rcar_drif_sdr_probe(struct rcar_drif_sdr *sdr) if (ret) goto error; - sdr->notifier.bound = rcar_drif_notify_bound; - sdr->notifier.unbind = rcar_drif_notify_unbind; - sdr->notifier.complete = rcar_drif_notify_complete; + sdr->notifier.ops = &rcar_drif_notify_ops; /* Register notifier */ ret = v4l2_async_notifier_register(&sdr->v4l2_dev, &sdr->notifier); diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c index 1f3c450c7a69..916ff68b73d4 100644 --- a/drivers/media/platform/soc_camera/soc_camera.c +++ b/drivers/media/platform/soc_camera/soc_camera.c @@ -1391,6 +1391,12 @@ static int soc_camera_async_complete(struct v4l2_async_notifier *notifier) return 0; } +static const struct v4l2_async_notifier_operations soc_camera_async_ops = { + .bound = soc_camera_async_bound, + .unbind = soc_camera_async_unbind, + .complete = soc_camera_async_complete, +}; + static int scan_async_group(struct soc_camera_host *ici, struct v4l2_async_subdev **asd, unsigned int size) { @@ -1437,9 +1443,7 @@ static int scan_async_group(struct soc_camera_host *ici, sasc->notifier.subdevs = asd; sasc->notifier.num_subdevs = size; - sasc->notifier.bound = soc_camera_async_bound; - sasc->notifier.unbind = soc_camera_async_unbind; - sasc->notifier.complete = soc_camera_async_complete; + sasc->notifier.ops = &soc_camera_async_ops; icd->sasc = sasc; icd->parent = ici->v4l2_dev.dev; @@ -1537,9 +1541,7 @@ static int soc_of_bind(struct soc_camera_host *ici, sasc->notifier.subdevs = &info->subdev; sasc->notifier.num_subdevs = 1; - sasc->notifier.bound = soc_camera_async_bound; - sasc->notifier.unbind = soc_camera_async_unbind; - sasc->notifier.complete = soc_camera_async_complete; + sasc->notifier.ops = &soc_camera_async_ops; icd->sasc = sasc; icd->parent = ici->v4l2_dev.dev; diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c index 35ba6f211b79..ac4c450a6c7d 100644 --- a/drivers/media/platform/stm32/stm32-dcmi.c +++ b/drivers/media/platform/stm32/stm32-dcmi.c @@ -1495,6 +1495,12 @@ static int dcmi_graph_notify_bound(struct v4l2_async_notifier *notifier, return 0; } +static const struct v4l2_async_notifier_operations dcmi_graph_notify_ops = { + .bound = dcmi_graph_notify_bound, + .unbind = dcmi_graph_notify_unbind, + .complete = dcmi_graph_notify_complete, +}; + static int dcmi_graph_parse(struct stm32_dcmi *dcmi, struct device_node *node) { struct device_node *ep = NULL; @@ -1542,9 +1548,7 @@ static int dcmi_graph_init(struct stm32_dcmi *dcmi) dcmi->notifier.subdevs = subdevs; dcmi->notifier.num_subdevs = 1; - dcmi->notifier.bound = dcmi_graph_notify_bound; - dcmi->notifier.unbind = dcmi_graph_notify_unbind; - dcmi->notifier.complete = dcmi_graph_notify_complete; + dcmi->notifier.ops = &dcmi_graph_notify_ops; ret = v4l2_async_notifier_register(&dcmi->v4l2_dev, &dcmi->notifier); if (ret < 0) { diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c index 42e383a48ffe..8b586c864524 100644 --- a/drivers/media/platform/ti-vpe/cal.c +++ b/drivers/media/platform/ti-vpe/cal.c @@ -1522,6 +1522,11 @@ static int cal_async_complete(struct v4l2_async_notifier *notifier) return 0; } +static const struct v4l2_async_notifier_operations cal_async_ops = { + .bound = cal_async_bound, + .complete = cal_async_complete, +}; + static int cal_complete_ctx(struct cal_ctx *ctx) { struct video_device *vfd; @@ -1736,8 +1741,7 @@ static int of_cal_create_instance(struct cal_ctx *ctx, int inst) ctx->asd_list[0] = asd; ctx->notifier.subdevs = ctx->asd_list; ctx->notifier.num_subdevs = 1; - ctx->notifier.bound = cal_async_bound; - ctx->notifier.complete = cal_async_complete; + ctx->notifier.ops = &cal_async_ops; ret = v4l2_async_notifier_register(&ctx->v4l2_dev, &ctx->notifier); if (ret) { diff --git a/drivers/media/platform/xilinx/xilinx-vipp.c b/drivers/media/platform/xilinx/xilinx-vipp.c index ebfdf334d99c..d881cf09876d 100644 --- a/drivers/media/platform/xilinx/xilinx-vipp.c +++ b/drivers/media/platform/xilinx/xilinx-vipp.c @@ -351,6 +351,11 @@ static int xvip_graph_notify_bound(struct v4l2_async_notifier *notifier, return -EINVAL; } +static const struct v4l2_async_notifier_operations xvip_graph_notify_ops = { + .bound = xvip_graph_notify_bound, + .complete = xvip_graph_notify_complete, +}; + static int xvip_graph_parse_one(struct xvip_composite_device *xdev, struct device_node *node) { @@ -548,8 +553,7 @@ static int xvip_graph_init(struct xvip_composite_device *xdev) xdev->notifier.subdevs = subdevs; xdev->notifier.num_subdevs = num_subdevs; - xdev->notifier.bound = xvip_graph_notify_bound; - xdev->notifier.complete = xvip_graph_notify_complete; + xdev->notifier.ops = &xvip_graph_notify_ops; ret = v4l2_async_notifier_register(&xdev->v4l2_dev, &xdev->notifier); if (ret < 0) { diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c index 7bd595c4094a..f7eb3713207a 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -107,16 +107,16 @@ static int v4l2_async_match_notify(struct v4l2_async_notifier *notifier, { int ret; - if (notifier->bound) { - ret = notifier->bound(notifier, sd, asd); + if (notifier->ops->bound) { + ret = notifier->ops->bound(notifier, sd, asd); if (ret < 0) return ret; } ret = v4l2_device_register_subdev(notifier->v4l2_dev, sd); if (ret < 0) { - if (notifier->unbind) - notifier->unbind(notifier, sd, asd); + if (notifier->ops->unbind) + notifier->ops->unbind(notifier, sd, asd); return ret; } @@ -128,8 +128,8 @@ static int v4l2_async_match_notify(struct v4l2_async_notifier *notifier, /* Move from the global subdevice list to notifier's done */ list_move(&sd->async_list, ¬ifier->done); - if (list_empty(¬ifier->waiting) && notifier->complete) - return notifier->complete(notifier); + if (list_empty(¬ifier->waiting) && notifier->ops->complete) + return notifier->ops->complete(notifier); return 0; } @@ -215,8 +215,8 @@ void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier) list_for_each_entry_safe(sd, tmp, ¬ifier->done, async_list) { v4l2_async_cleanup(sd); - if (notifier->unbind) - notifier->unbind(notifier, sd, sd->asd); + if (notifier->ops->unbind) + notifier->ops->unbind(notifier, sd, sd->asd); } mutex_unlock(&list_lock); @@ -294,8 +294,8 @@ void v4l2_async_unregister_subdev(struct v4l2_subdev *sd) v4l2_async_cleanup(sd); - if (notifier->unbind) - notifier->unbind(notifier, sd, sd->asd); + if (notifier->ops->unbind) + notifier->ops->unbind(notifier, sd, sd->asd); mutex_unlock(&list_lock); } diff --git a/drivers/staging/media/imx/imx-media-dev.c b/drivers/staging/media/imx/imx-media-dev.c index d96f4512224f..e8dc2c93658a 100644 --- a/drivers/staging/media/imx/imx-media-dev.c +++ b/drivers/staging/media/imx/imx-media-dev.c @@ -440,6 +440,11 @@ static int imx_media_probe_complete(struct v4l2_async_notifier *notifier) return media_device_register(&imxmd->md); } +static const struct v4l2_async_notifier_operations imx_media_subdev_ops = { + .bound = imx_media_subdev_bound, + .complete = imx_media_probe_complete, +}; + /* * adds controls to a video device from an entity subdevice. * Continues upstream from the entity's sink pads. @@ -608,8 +613,7 @@ static int imx_media_probe(struct platform_device *pdev) /* prepare the async subdev notifier and register it */ imxmd->subdev_notifier.subdevs = imxmd->async_ptrs; - imxmd->subdev_notifier.bound = imx_media_subdev_bound; - imxmd->subdev_notifier.complete = imx_media_probe_complete; + imxmd->subdev_notifier.ops = &imx_media_subdev_ops; ret = v4l2_async_notifier_register(&imxmd->v4l2_dev, &imxmd->subdev_notifier); if (ret) { diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h index 96fa1afc00dd..3c48f8b66d12 100644 --- a/include/media/v4l2-async.h +++ b/include/media/v4l2-async.h @@ -18,6 +18,7 @@ struct device; struct device_node; struct v4l2_device; struct v4l2_subdev; +struct v4l2_async_notifier; /* A random max subdevice number, used to allocate an array on stack */ #define V4L2_MAX_SUBDEVS 128U @@ -79,8 +80,25 @@ struct v4l2_async_subdev { }; /** + * struct v4l2_async_notifier_operations - Asynchronous V4L2 notifier operations + * @bound: a subdevice driver has successfully probed one of the subdevices + * @complete: all subdevices have been probed successfully + * @unbind: a subdevice is leaving + */ +struct v4l2_async_notifier_operations { + int (*bound)(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd); + int (*complete)(struct v4l2_async_notifier *notifier); + void (*unbind)(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd); +}; + +/** * struct v4l2_async_notifier - v4l2_device notifier data * + * @ops: notifier operations * @num_subdevs: number of subdevices used in the subdevs array * @max_subdevs: number of subdevices allocated in the subdevs array * @subdevs: array of pointers to subdevice descriptors @@ -88,11 +106,9 @@ struct v4l2_async_subdev { * @waiting: list of struct v4l2_async_subdev, waiting for their drivers * @done: list of struct v4l2_subdev, already probed * @list: member in a global list of notifiers - * @bound: a subdevice driver has successfully probed one of subdevices - * @complete: all subdevices have been probed successfully - * @unbind: a subdevice is leaving */ struct v4l2_async_notifier { + const struct v4l2_async_notifier_operations *ops; unsigned int num_subdevs; unsigned int max_subdevs; struct v4l2_async_subdev **subdevs; @@ -100,13 +116,6 @@ struct v4l2_async_notifier { struct list_head waiting; struct list_head done; struct list_head list; - int (*bound)(struct v4l2_async_notifier *notifier, - struct v4l2_subdev *subdev, - struct v4l2_async_subdev *asd); - int (*complete)(struct v4l2_async_notifier *notifier); - void (*unbind)(struct v4l2_async_notifier *notifier, - struct v4l2_subdev *subdev, - struct v4l2_async_subdev *asd); }; /** -- 2.11.0