[PATCH v2] coresight: Use local coresight_desc instances

From: Suzuki K Poulose
Date: Wed Jul 13 2016 - 12:41:23 EST

Next message: Peter Zijlstra: "Re: [PATCH net-next 1/3] perf, events: add non-linear data support for raw records"
Previous message: Kristian Evensen: "[PATCH] rndis_host: Set random MAC for ZTE MF910"
Next in thread: Mathieu Poirier: "Re: [PATCH v2] coresight: Use local coresight_desc instances"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Each coresight device prepares a description for coresight_register()
in struct coresight_desc. Once we register the device, the description is
useless and can be freed. The coresight_desc is small enough (48bytes on
64bit)i to be allocated on the stack. Hence use an automatic variable to
avoid a needless dynamic allocation and wasting the memory(which will only
be free'd when the device is destroyed).

Cc: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Cc: Pratik Patel <pratikp@xxxxxxxxxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
---
Changes since V1:
- Fix build errors in replicator-qcom
---
drivers/hwtracing/coresight/coresight-etb10.c | 20 ++++++--------
drivers/hwtracing/coresight/coresight-etm3x.c | 20 ++++++--------
drivers/hwtracing/coresight/coresight-etm4x.c | 20 ++++++--------
drivers/hwtracing/coresight/coresight-funnel.c | 20 ++++++--------
.../coresight/coresight-replicator-qcom.c | 18 +++++--------
drivers/hwtracing/coresight/coresight-replicator.c | 20 +++++---------
drivers/hwtracing/coresight/coresight-stm.c | 22 ++++++---------
drivers/hwtracing/coresight/coresight-tmc.c | 31 ++++++++++------------
drivers/hwtracing/coresight/coresight-tpiu.c | 18 +++++--------
9 files changed, 75 insertions(+), 114 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 3b483e3..8a4927c 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -636,7 +636,7 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
struct coresight_platform_data *pdata = NULL;
struct etb_drvdata *drvdata;
struct resource *res = &adev->res;
- struct coresight_desc *desc;
+ struct coresight_desc desc = { 0 };
struct device_node *np = adev->dev.of_node;

if (np) {
@@ -682,17 +682,13 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
return -ENOMEM;
}

- desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
- if (!desc)
- return -ENOMEM;
-
- desc->type = CORESIGHT_DEV_TYPE_SINK;
- desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;
- desc->ops = &etb_cs_ops;
- desc->pdata = pdata;
- desc->dev = dev;
- desc->groups = coresight_etb_groups;
- drvdata->csdev = coresight_register(desc);
+ desc.type = CORESIGHT_DEV_TYPE_SINK;
+ desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;
+ desc.ops = &etb_cs_ops;
+ desc.pdata = pdata;
+ desc.dev = dev;
+ desc.groups = coresight_etb_groups;
+ drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);

diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
index d83ab82..beaaa2c 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -758,13 +758,9 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
struct coresight_platform_data *pdata = NULL;
struct etm_drvdata *drvdata;
struct resource *res = &adev->res;
- struct coresight_desc *desc;
+ struct coresight_desc desc = { 0 };
struct device_node *np = adev->dev.of_node;

- desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
- if (!desc)
- return -ENOMEM;
-
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
@@ -819,13 +815,13 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
etm_init_trace_id(drvdata);
etm_set_default(&drvdata->config);

- desc->type = CORESIGHT_DEV_TYPE_SOURCE;
- desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
- desc->ops = &etm_cs_ops;
- desc->pdata = pdata;
- desc->dev = dev;
- desc->groups = coresight_etm_groups;
- drvdata->csdev = coresight_register(desc);
+ desc.type = CORESIGHT_DEV_TYPE_SOURCE;
+ desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
+ desc.ops = &etm_cs_ops;
+ desc.pdata = pdata;
+ desc.dev = dev;
+ desc.groups = coresight_etm_groups;
+ drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev)) {
ret = PTR_ERR(drvdata->csdev);
goto err_arch_supported;
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index c8b44c6..2c21b1d 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c
@@ -726,13 +726,9 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
struct coresight_platform_data *pdata = NULL;
struct etmv4_drvdata *drvdata;
struct resource *res = &adev->res;
- struct coresight_desc *desc;
+ struct coresight_desc desc = { 0 };
struct device_node *np = adev->dev.of_node;

- desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
- if (!desc)
- return -ENOMEM;
-
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
@@ -778,13 +774,13 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
etm4_init_trace_id(drvdata);
etm4_set_default(&drvdata->config);

- desc->type = CORESIGHT_DEV_TYPE_SOURCE;
- desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
- desc->ops = &etm4_cs_ops;
- desc->pdata = pdata;
- desc->dev = dev;
- desc->groups = coresight_etmv4_groups;
- drvdata->csdev = coresight_register(desc);
+ desc.type = CORESIGHT_DEV_TYPE_SOURCE;
+ desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
+ desc.ops = &etm4_cs_ops;
+ desc.pdata = pdata;
+ desc.dev = dev;
+ desc.groups = coresight_etmv4_groups;
+ drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev)) {
ret = PTR_ERR(drvdata->csdev);
goto err_arch_supported;
diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index 05df789..860fe6e 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -176,7 +176,7 @@ static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
struct coresight_platform_data *pdata = NULL;
struct funnel_drvdata *drvdata;
struct resource *res = &adev->res;
- struct coresight_desc *desc;
+ struct coresight_desc desc = { 0 };
struct device_node *np = adev->dev.of_node;

if (np) {
@@ -207,17 +207,13 @@ static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
drvdata->base = base;
pm_runtime_put(&adev->dev);

- desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
- if (!desc)
- return -ENOMEM;
-
- desc->type = CORESIGHT_DEV_TYPE_LINK;
- desc->subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_MERG;
- desc->ops = &funnel_cs_ops;
- desc->pdata = pdata;
- desc->dev = dev;
- desc->groups = coresight_funnel_groups;
- drvdata->csdev = coresight_register(desc);
+ desc.type = CORESIGHT_DEV_TYPE_LINK;
+ desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_MERG;
+ desc.ops = &funnel_cs_ops;
+ desc.pdata = pdata;
+ desc.dev = dev;
+ desc.groups = coresight_funnel_groups;
+ drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);

diff --git a/drivers/hwtracing/coresight/coresight-replicator-qcom.c b/drivers/hwtracing/coresight/coresight-replicator-qcom.c
index 700f710..0a3d15f 100644
--- a/drivers/hwtracing/coresight/coresight-replicator-qcom.c
+++ b/drivers/hwtracing/coresight/coresight-replicator-qcom.c
@@ -102,7 +102,7 @@ static int replicator_probe(struct amba_device *adev, const struct amba_id *id)
struct resource *res = &adev->res;
struct coresight_platform_data *pdata = NULL;
struct replicator_state *drvdata;
- struct coresight_desc *desc;
+ struct coresight_desc desc = { 0 };
struct device_node *np = adev->dev.of_node;
void __iomem *base;

@@ -134,16 +134,12 @@ static int replicator_probe(struct amba_device *adev, const struct amba_id *id)
dev_set_drvdata(dev, drvdata);
pm_runtime_put(&adev->dev);

- desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
- if (!desc)
- return -ENOMEM;
-
- desc->type = CORESIGHT_DEV_TYPE_LINK;
- desc->subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
- desc->ops = &replicator_cs_ops;
- desc->pdata = adev->dev.platform_data;
- desc->dev = &adev->dev;
- drvdata->csdev = coresight_register(desc);
+ desc.type = CORESIGHT_DEV_TYPE_LINK;
+ desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
+ desc.ops = &replicator_cs_ops;
+ desc.pdata = adev->dev.platform_data;
+ desc.dev = &adev->dev;
+ drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);

diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index c6982e3..3756e71 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -69,7 +69,7 @@ static int replicator_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct coresight_platform_data *pdata = NULL;
struct replicator_drvdata *drvdata;
- struct coresight_desc *desc;
+ struct coresight_desc desc = { 0 };
struct device_node *np = pdev->dev.of_node;

if (np) {
@@ -95,18 +95,12 @@ static int replicator_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
platform_set_drvdata(pdev, drvdata);

- desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
- if (!desc) {
- ret = -ENOMEM;
- goto out_disable_pm;
- }
-
- desc->type = CORESIGHT_DEV_TYPE_LINK;
- desc->subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
- desc->ops = &replicator_cs_ops;
- desc->pdata = pdev->dev.platform_data;
- desc->dev = &pdev->dev;
- drvdata->csdev = coresight_register(desc);
+ desc.type = CORESIGHT_DEV_TYPE_LINK;
+ desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
+ desc.ops = &replicator_cs_ops;
+ desc.pdata = pdev->dev.platform_data;
+ desc.dev = &pdev->dev;
+ drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev)) {
ret = PTR_ERR(drvdata->csdev);
goto out_disable_pm;
diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index 73be58a..c221de0 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -778,7 +778,7 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
struct resource *res = &adev->res;
struct resource ch_res;
size_t res_size, bitmap_size;
- struct coresight_desc *desc;
+ struct coresight_desc desc = { 0 };
struct device_node *np = adev->dev.of_node;

if (np) {
@@ -843,19 +843,13 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
return -EPROBE_DEFER;
}

- desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
- if (!desc) {
- ret = -ENOMEM;
- goto stm_unregister;
- }
-
- desc->type = CORESIGHT_DEV_TYPE_SOURCE;
- desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE;
- desc->ops = &stm_cs_ops;
- desc->pdata = pdata;
- desc->dev = dev;
- desc->groups = coresight_stm_groups;
- drvdata->csdev = coresight_register(desc);
+ desc.type = CORESIGHT_DEV_TYPE_SOURCE;
+ desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE;
+ desc.ops = &stm_cs_ops;
+ desc.pdata = pdata;
+ desc.dev = dev;
+ desc.groups = coresight_stm_groups;
+ drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev)) {
ret = PTR_ERR(drvdata->csdev);
goto stm_unregister;
diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
index 84052c7..4cbcaf9 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c
@@ -302,7 +302,7 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
struct coresight_platform_data *pdata = NULL;
struct tmc_drvdata *drvdata;
struct resource *res = &adev->res;
- struct coresight_desc *desc;
+ struct coresight_desc desc = { 0 };
struct device_node *np = adev->dev.of_node;

if (np) {
@@ -319,10 +319,6 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
if (!drvdata)
goto out;

- desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
- if (!desc)
- goto out;
-
drvdata->dev = &adev->dev;
dev_set_drvdata(dev, drvdata);

@@ -354,24 +350,25 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)

pm_runtime_put(&adev->dev);

- desc->pdata = pdata;
- desc->dev = dev;
- desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;
- desc->groups = coresight_tmc_groups;
+ desc.pdata = pdata;
+ desc.dev = dev;
+ desc.groups = coresight_tmc_groups;

if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) {
- desc->type = CORESIGHT_DEV_TYPE_SINK;
- desc->ops = &tmc_etb_cs_ops;
+ desc.type = CORESIGHT_DEV_TYPE_SINK;
+ desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;
+ desc.ops = &tmc_etb_cs_ops;
} else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) {
- desc->type = CORESIGHT_DEV_TYPE_SINK;
- desc->ops = &tmc_etr_cs_ops;
+ desc.type = CORESIGHT_DEV_TYPE_SINK;
+ desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;
+ desc.ops = &tmc_etr_cs_ops;
} else {
- desc->type = CORESIGHT_DEV_TYPE_LINKSINK;
- desc->subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_FIFO;
- desc->ops = &tmc_etf_cs_ops;
+ desc.type = CORESIGHT_DEV_TYPE_LINKSINK;
+ desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_FIFO;
+ desc.ops = &tmc_etf_cs_ops;
}

- drvdata->csdev = coresight_register(desc);
+ drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev)) {
ret = PTR_ERR(drvdata->csdev);
goto out;
diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
index 4e471e2..0673baf 100644
--- a/drivers/hwtracing/coresight/coresight-tpiu.c
+++ b/drivers/hwtracing/coresight/coresight-tpiu.c
@@ -119,7 +119,7 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
struct coresight_platform_data *pdata = NULL;
struct tpiu_drvdata *drvdata;
struct resource *res = &adev->res;
- struct coresight_desc *desc;
+ struct coresight_desc desc = { 0 };
struct device_node *np = adev->dev.of_node;

if (np) {
@@ -154,16 +154,12 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)

pm_runtime_put(&adev->dev);

- desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
- if (!desc)
- return -ENOMEM;
-
- desc->type = CORESIGHT_DEV_TYPE_SINK;
- desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_PORT;
- desc->ops = &tpiu_cs_ops;
- desc->pdata = pdata;
- desc->dev = dev;
- drvdata->csdev = coresight_register(desc);
+ desc.type = CORESIGHT_DEV_TYPE_SINK;
+ desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_PORT;
+ desc.ops = &tpiu_cs_ops;
+ desc.pdata = pdata;
+ desc.dev = dev;
+ drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);

--
2.7.4

Next message: Peter Zijlstra: "Re: [PATCH net-next 1/3] perf, events: add non-linear data support for raw records"
Previous message: Kristian Evensen: "[PATCH] rndis_host: Set random MAC for ZTE MF910"
Next in thread: Mathieu Poirier: "Re: [PATCH v2] coresight: Use local coresight_desc instances"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]