From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, coresight@lists.linaro.org,
mike.leach@linaro.org, rjw@rjwysocki.net, robert.walker@arm.com
Subject: Re: [PATCH v2 25/36] coresight: Rearrange platform data probing
Date: Mon, 22 Apr 2019 11:16:08 -0600 [thread overview]
Message-ID: <20190422171608.GB6402@xps15> (raw)
In-Reply-To: <1555344260-12375-26-git-send-email-suzuki.poulose@arm.com>
On Mon, Apr 15, 2019 at 05:04:08PM +0100, Suzuki K Poulose wrote:
> We are about to introduce methods to clean up the platform data
> as we switch to tracking the device reference from "name" to "fwnode
> handles" for device connections. This requires us to drop the fwnode
> handle references when the data is no longer required - i.e, when
> the device probe fails or the device gets unregistered.
>
> In order to consolidate the invocation of the cleanup, we delay the
> platform probing to the very last minute, possibly before invoking
> the coresight_register. Then, we leave the coresight core code to
> do the clean up. i.e, if the coresight_register fails, it takes
> care of freeing the data. Otherwise, coresight_unregister will
> do the necessary operations.
>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> ---
> drivers/hwtracing/coresight/coresight-catu.c | 14 +++++++-------
> drivers/hwtracing/coresight/coresight-etb10.c | 10 +++++-----
> drivers/hwtracing/coresight/coresight-etm3x.c | 12 +++++++-----
> drivers/hwtracing/coresight/coresight-etm4x.c | 10 +++++-----
> drivers/hwtracing/coresight/coresight-funnel.c | 10 +++++-----
> drivers/hwtracing/coresight/coresight-replicator.c | 12 +++++++-----
> drivers/hwtracing/coresight/coresight-stm.c | 11 +++++++----
> drivers/hwtracing/coresight/coresight-tmc.c | 16 ++++++++--------
> drivers/hwtracing/coresight/coresight-tpiu.c | 9 ++++-----
> 9 files changed, 55 insertions(+), 49 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
> index 03f5b95..f249be6 100644
> --- a/drivers/hwtracing/coresight/coresight-catu.c
> +++ b/drivers/hwtracing/coresight/coresight-catu.c
> @@ -505,13 +505,6 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
> struct device *dev = &adev->dev;
> void __iomem *base;
>
> - pdata = coresight_get_platform_data(dev);
> - if (IS_ERR(pdata)) {
> - ret = PTR_ERR(pdata);
> - goto out;
> - }
> - dev->platform_data = pdata;
> -
> drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
> if (!drvdata) {
> ret = -ENOMEM;
> @@ -544,6 +537,13 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
> if (ret)
> goto out;
>
> + pdata = coresight_get_platform_data(dev);
> + if (IS_ERR(pdata)) {
> + ret = PTR_ERR(pdata);
> + goto out;
> + }
> + dev->platform_data = pdata;
> +
> drvdata->base = base;
> catu_desc.pdata = pdata;
> catu_desc.dev = dev;
> diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
> index 91a5d7a..e5b46c7 100644
> --- a/drivers/hwtracing/coresight/coresight-etb10.c
> +++ b/drivers/hwtracing/coresight/coresight-etb10.c
> @@ -682,11 +682,6 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
> struct resource *res = &adev->res;
> struct coresight_desc desc = { 0 };
>
> - pdata = coresight_get_platform_data(dev);
> - if (IS_ERR(pdata))
> - return PTR_ERR(pdata);
> - adev->dev.platform_data = pdata;
> -
> drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
> if (!drvdata)
> return -ENOMEM;
> @@ -718,6 +713,11 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
> if (!drvdata->buf)
> return -ENOMEM;
>
> + pdata = coresight_get_platform_data(dev);
> + if (IS_ERR(pdata))
> + return PTR_ERR(pdata);
> + adev->dev.platform_data = pdata;
> +
> desc.type = CORESIGHT_DEV_TYPE_SINK;
> desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;
> desc.ops = &etb_cs_ops;
> diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
> index 101fb01..f2d4616 100644
> --- a/drivers/hwtracing/coresight/coresight-etm3x.c
> +++ b/drivers/hwtracing/coresight/coresight-etm3x.c
> @@ -795,11 +795,6 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
> if (!drvdata)
> return -ENOMEM;
>
> - pdata = coresight_get_platform_data(dev);
> - if (IS_ERR(pdata))
> - return PTR_ERR(pdata);
> -
> - adev->dev.platform_data = pdata;
> drvdata->use_cp14 = fwnode_property_read_bool(dev->fwnode, "arm,cp14");
> dev_set_drvdata(dev, drvdata);
>
> @@ -849,6 +844,13 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
> etm_init_trace_id(drvdata);
> etm_set_default(&drvdata->config);
>
> + pdata = coresight_get_platform_data(dev);
> + if (IS_ERR(pdata)) {
> + ret = PTR_ERR(pdata);
> + goto err_arch_supported;
> + }
> + adev->dev.platform_data = pdata;
> +
> desc.type = CORESIGHT_DEV_TYPE_SOURCE;
> desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
> desc.ops = &etm_cs_ops;
> diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
> index 7ff0989..7c53fb2 100644
> --- a/drivers/hwtracing/coresight/coresight-etm4x.c
> +++ b/drivers/hwtracing/coresight/coresight-etm4x.c
> @@ -981,11 +981,6 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
> if (!drvdata)
> return -ENOMEM;
>
> - pdata = coresight_get_platform_data(dev);
> - if (IS_ERR(pdata))
> - return PTR_ERR(pdata);
> - adev->dev.platform_data = pdata;
> -
> dev_set_drvdata(dev, drvdata);
>
> /* Validity for the resource is already checked by the AMBA core */
> @@ -1028,6 +1023,11 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
> etm4_init_trace_id(drvdata);
> etm4_set_default(&drvdata->config);
>
> + pdata = coresight_get_platform_data(dev);
> + if (IS_ERR(pdata))
> + return PTR_ERR(pdata);
Here you need to "goto err_arch_supported" instead of returning.
> + adev->dev.platform_data = pdata;
> +
> desc.type = CORESIGHT_DEV_TYPE_SOURCE;
> desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
> desc.ops = &etm4_cs_ops;
> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
> index 61a9e01..38af045 100644
> --- a/drivers/hwtracing/coresight/coresight-funnel.c
> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
> @@ -186,11 +186,6 @@ static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
> struct resource *res = &adev->res;
> struct coresight_desc desc = { 0 };
>
> - pdata = coresight_get_platform_data(dev);
> - if (IS_ERR(pdata))
> - return PTR_ERR(pdata);
> - adev->dev.platform_data = pdata;
> -
> drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
> if (!drvdata)
> return -ENOMEM;
> @@ -211,6 +206,11 @@ static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
> drvdata->base = base;
> pm_runtime_put(&adev->dev);
>
> + pdata = coresight_get_platform_data(dev);
> + if (IS_ERR(pdata))
> + return PTR_ERR(pdata);
> + adev->dev.platform_data = pdata;
> +
> desc.type = CORESIGHT_DEV_TYPE_LINK;
> desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_MERG;
> desc.ops = &funnel_cs_ops;
> diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
> index 939f20d..8fbc028 100644
> --- a/drivers/hwtracing/coresight/coresight-replicator.c
> +++ b/drivers/hwtracing/coresight/coresight-replicator.c
> @@ -179,11 +179,6 @@ static int replicator_probe(struct device *dev, struct resource *res)
> struct coresight_desc desc = { 0 };
> void __iomem *base;
>
> - pdata = coresight_get_platform_data(dev);
> - if (IS_ERR(pdata))
> - return PTR_ERR(pdata);
> - dev->platform_data = pdata;
> -
> drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
> if (!drvdata)
> return -ENOMEM;
> @@ -209,6 +204,13 @@ static int replicator_probe(struct device *dev, struct resource *res)
> desc.groups = replicator_groups;
> }
>
> + pdata = coresight_get_platform_data(dev);
> + if (IS_ERR(pdata)) {
> + ret = PTR_ERR(pdata);
> + goto out_disable_clk;
> + }
> + dev->platform_data = pdata;
> +
> dev_set_drvdata(dev, drvdata);
> desc.type = CORESIGHT_DEV_TYPE_LINK;
> desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
> diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
> index 734227f..5c7fc4a 100644
> --- a/drivers/hwtracing/coresight/coresight-stm.c
> +++ b/drivers/hwtracing/coresight/coresight-stm.c
> @@ -810,10 +810,6 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
> size_t bitmap_size;
> struct coresight_desc desc = { 0 };
>
> - pdata = coresight_get_platform_data(dev);
> - if (IS_ERR(pdata))
> - return PTR_ERR(pdata);
> - adev->dev.platform_data = pdata;
> drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
> if (!drvdata)
> return -ENOMEM;
> @@ -866,6 +862,13 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
> return -EPROBE_DEFER;
> }
>
> + pdata = coresight_get_platform_data(dev);
> + if (IS_ERR(pdata)) {
> + ret = PTR_ERR(pdata);
> + goto stm_unregister;
> + }
> + adev->dev.platform_data = pdata;
> +
> desc.type = CORESIGHT_DEV_TYPE_SOURCE;
> desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE;
> desc.ops = &stm_cs_ops;
> diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
> index 02c5cb5..94d3ebf 100644
> --- a/drivers/hwtracing/coresight/coresight-tmc.c
> +++ b/drivers/hwtracing/coresight/coresight-tmc.c
> @@ -396,13 +396,6 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
> struct resource *res = &adev->res;
> struct coresight_desc desc = { 0 };
>
> - pdata = coresight_get_platform_data(dev);
> - if (IS_ERR(pdata)) {
> - ret = PTR_ERR(pdata);
> - goto out;
> - }
> - adev->dev.platform_data = pdata;
> -
> ret = -ENOMEM;
> drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
> if (!drvdata)
> @@ -430,7 +423,6 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
> else
> drvdata->size = readl_relaxed(drvdata->base + TMC_RSZ) * 4;
>
> - desc.pdata = pdata;
> desc.dev = dev;
> desc.groups = coresight_tmc_groups;
> desc.name = dev_name(dev);
> @@ -461,6 +453,14 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
> goto out;
> }
>
> + pdata = coresight_get_platform_data(dev);
> + if (IS_ERR(pdata)) {
> + ret = PTR_ERR(pdata);
> + goto out;
> + }
> + adev->dev.platform_data = pdata;
> + desc.pdata = pdata;
> +
> drvdata->csdev = coresight_register(&desc);
> if (IS_ERR(drvdata->csdev)) {
> ret = PTR_ERR(drvdata->csdev);
> diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
> index 792f1d6..39a509f 100644
> --- a/drivers/hwtracing/coresight/coresight-tpiu.c
> +++ b/drivers/hwtracing/coresight/coresight-tpiu.c
> @@ -121,11 +121,6 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
> struct resource *res = &adev->res;
> struct coresight_desc desc = { 0 };
>
> - pdata = coresight_get_platform_data(dev);
> - if (IS_ERR(pdata))
> - return PTR_ERR(pdata);
> - dev->platform_data = pdata;
> -
> drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
> if (!drvdata)
> return -ENOMEM;
> @@ -148,6 +143,10 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
> /* Disable tpiu to support older devices */
> tpiu_disable_hw(drvdata);
>
> + pdata = coresight_get_platform_data(dev);
> + if (IS_ERR(pdata))
> + return PTR_ERR(pdata);
> + dev->platform_data = pdata;
>
> desc.type = CORESIGHT_DEV_TYPE_SINK;
> desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_PORT;
> --
> 2.7.4
>
next prev parent reply other threads:[~2019-04-22 17:16 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-15 16:03 [PATCH v2 00/36] coresight: Support for ACPI bindings Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 01/36] coresight: Fix freeing up the coresight connections Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 02/36] coresight: etb10: Cleanup power management Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 03/36] coresight: tpiu: " Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 04/36] coresight: catu: " Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 05/36] coresight: tmc: " Suzuki K Poulose
2019-04-17 20:03 ` Mathieu Poirier
2019-04-23 9:33 ` Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 06/36] coresight: funnel: Clean up device book keeping Suzuki K Poulose
2019-04-17 20:14 ` Mathieu Poirier
2019-04-15 16:03 ` [PATCH v2 07/36] coresight: replicator: Cleanup device tracking Suzuki K Poulose
2019-04-17 20:34 ` Mathieu Poirier
2019-04-15 16:03 ` [PATCH v2 08/36] coresight: tmc: Clean up device specific data Suzuki K Poulose
2019-04-17 21:23 ` Mathieu Poirier
2019-05-03 17:13 ` Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 09/36] coresight: catu: Cleanup " Suzuki K Poulose
2019-04-17 21:40 ` Mathieu Poirier
2019-04-15 16:03 ` [PATCH v2 10/36] coresight: tpiu: Clean up " Suzuki K Poulose
2019-04-17 21:41 ` Mathieu Poirier
2019-04-15 16:03 ` [PATCH v2 11/36] coresight: stm: Cleanup " Suzuki K Poulose
2019-04-18 16:50 ` Mathieu Poirier
2019-04-15 16:03 ` [PATCH v2 12/36] coresight: etm: Clean up " Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 13/36] coresight: etb10: " Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 14/36] coresight: Rename of_coresight to coresight-platform Suzuki K Poulose
2019-04-18 17:22 ` Mathieu Poirier
2019-04-15 16:03 ` [PATCH v2 15/36] coresight: etm3x: Rearrange cp14 access detection Suzuki K Poulose
2019-04-15 16:03 ` [PATCH v2 16/36] coresight: stm: Rearrange probing the stimulus area Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 17/36] coresight: tmc-etr: Rearrange probing default buffer size Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 18/36] coresight: platform: Make memory allocation helper generic Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 19/36] coresight: Introduce generic platform data helper Suzuki K Poulose
2019-04-22 18:09 ` Mathieu Poirier
2019-04-23 9:43 ` Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 20/36] coresight: Make device to CPU mapping generic Suzuki K Poulose
2019-04-18 18:14 ` Mathieu Poirier
2019-04-15 16:04 ` [PATCH v2 21/36] coresight: Remove cpu field from platform data Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 22/36] coresight: Remove name from platform description Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 23/36] coresight: Cleanup coresight_remove_conns Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 24/36] coresight: Reuse platform data structure for connection tracking Suzuki K Poulose
2019-04-22 17:06 ` Mathieu Poirier
2019-04-15 16:04 ` [PATCH v2 25/36] coresight: Rearrange platform data probing Suzuki K Poulose
2019-04-22 17:16 ` Mathieu Poirier [this message]
2019-04-25 17:12 ` Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 26/36] coresight: Add support for releasing platform specific data Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 27/36] drivers: Add a generic helper to match device by fwnode handle Suzuki K Poulose
2019-04-16 10:20 ` Rafael J. Wysocki
2019-04-16 10:34 ` Suzuki K Poulose
2019-04-16 10:45 ` Rafael J. Wysocki
2019-04-16 10:39 ` [RESEND][PATCH " Suzuki K Poulose
2019-04-16 10:48 ` Rafael J. Wysocki
2019-04-16 10:56 ` Suzuki K Poulose
2019-04-18 14:39 ` Rafael J. Wysocki
2019-04-18 15:18 ` Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 28/36] coresight: platform: Use fwnode handle for device search Suzuki K Poulose
2019-04-23 16:17 ` Mathieu Poirier
2019-04-15 16:04 ` [PATCH v2 29/36] coresight: Use fwnode handle instead of device names Suzuki K Poulose
2019-04-23 16:14 ` Mathieu Poirier
2019-04-15 16:04 ` [PATCH v2 30/36] coresight: Use platform agnostic names Suzuki K Poulose
2019-04-23 17:38 ` Mathieu Poirier
2019-04-15 16:04 ` [PATCH v2 31/36] coresight: stm: ACPI support for parsing stimulus base Suzuki K Poulose
2019-04-23 17:59 ` Mathieu Poirier
2019-04-25 16:17 ` Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 32/36] coresight: Support for ACPI bindings Suzuki K Poulose
2019-04-25 16:50 ` Mathieu Poirier
2019-04-25 17:30 ` Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 33/36] coresight: acpi: Support for components Suzuki K Poulose
2019-04-25 17:45 ` Mathieu Poirier
2019-04-29 8:54 ` Suzuki K Poulose
2019-04-15 16:04 ` [PATCH v2 34/36] [RFC] coresight: Pass coresight_device for coresight_release_platform_data Suzuki K Poulose
2019-04-29 17:40 ` Mathieu Poirier
2019-04-15 16:04 ` [PATCH v2 35/36] [RFC] coresight: add return value for fixup connections Suzuki K Poulose
2019-04-29 17:44 ` Mathieu Poirier
2019-04-15 16:04 ` [PATCH v2 36/36] [RFC] coresight: Expose device connections via sysfs Suzuki K Poulose
2019-04-29 20:50 ` Mathieu Poirier
2019-04-15 16:04 ` [TEST PATCH 37/36][EDK2] edk2-platform: juno: Update ACPI CoreSight Bindings Suzuki K Poulose
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