[PATCH V6 1/6] coresight: etm4x: Allocate and device assign 'struct etmv4_drvdata' earlier

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Allocate and device assign 'struct etmv4_drvdata' earlier during the driver
probe, ensuring that it can be retrieved in power management based runtime
callbacks if required. This will also help in dropping iomem base address
argument from the function etm4_probe() later.

Cc: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Cc: Mike Leach <mike.leach@xxxxxxxxxx>
Cc: Leo Yan <leo.yan@xxxxxxxxxx>
Cc: coresight@xxxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
 .../coresight/coresight-etm4x-core.c          | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 7e307022303a..264242ba345b 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -2046,17 +2046,14 @@ static int etm4_add_coresight_dev(struct etm4_init_arg *init_arg)
 
 static int etm4_probe(struct device *dev, void __iomem *base, u32 etm_pid)
 {
-	struct etmv4_drvdata *drvdata;
+	struct etmv4_drvdata *drvdata = dev_get_drvdata(dev);
 	struct csdev_access access = { 0 };
 	struct etm4_init_arg init_arg = { 0 };
 	struct etm4_init_arg *delayed;
 
-	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
-	if (!drvdata)
+	if (WARN_ON(!drvdata))
 		return -ENOMEM;
 
-	dev_set_drvdata(dev, drvdata);
-
 	if (pm_save_enable == PARAM_PM_SAVE_FIRMWARE)
 		pm_save_enable = coresight_loses_context_with_cpu(dev) ?
 			       PARAM_PM_SAVE_SELF_HOSTED : PARAM_PM_SAVE_NEVER;
@@ -2108,6 +2105,7 @@ static int etm4_probe(struct device *dev, void __iomem *base, u32 etm_pid)
 
 static int etm4_probe_amba(struct amba_device *adev, const struct amba_id *id)
 {
+	struct etmv4_drvdata *drvdata;
 	void __iomem *base;
 	struct device *dev = &adev->dev;
 	struct resource *res = &adev->res;
@@ -2118,6 +2116,11 @@ static int etm4_probe_amba(struct amba_device *adev, const struct amba_id *id)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
+	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
+	if (!drvdata)
+		return -ENOMEM;
+
+	dev_set_drvdata(dev, drvdata);
 	ret = etm4_probe(dev, base, id->id);
 	if (!ret)
 		pm_runtime_put(&adev->dev);
@@ -2127,8 +2130,14 @@ static int etm4_probe_amba(struct amba_device *adev, const struct amba_id *id)
 
 static int etm4_probe_platform_dev(struct platform_device *pdev)
 {
+	struct etmv4_drvdata *drvdata;
 	int ret;
 
+	drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
+	if (!drvdata)
+		return -ENOMEM;
+
+	dev_set_drvdata(&pdev->dev, drvdata);
 	pm_runtime_get_noresume(&pdev->dev);
 	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
-- 
2.25.1




[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]
  Powered by Linux