lkml.org 
[lkml]   [2019]   [Apr]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 02/36] coresight: etb10: Cleanup power management
Date
We drop the power before we complete the probe successfully. We
are supposed to drop it only when we are successful. Also, probing
the etb_buffer_length happens with the power turned up. So we don't
need to do that again in the helper.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
drivers/hwtracing/coresight/coresight-etb10.c | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 105782e..13c0a60 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -93,17 +93,9 @@ struct etb_drvdata {
static int etb_set_buffer(struct coresight_device *csdev,
struct perf_output_handle *handle);

-static unsigned int etb_get_buffer_depth(struct etb_drvdata *drvdata)
+static inline unsigned int etb_get_buffer_depth(struct etb_drvdata *drvdata)
{
- u32 depth = 0;
-
- pm_runtime_get_sync(drvdata->dev);
-
- /* RO registers don't need locking */
- depth = readl_relaxed(drvdata->base + ETB_RAM_DEPTH_REG);
-
- pm_runtime_put(drvdata->dev);
- return depth;
+ return readl_relaxed(drvdata->base + ETB_RAM_DEPTH_REG);
}

static void __etb_enable_hw(struct etb_drvdata *drvdata)
@@ -720,7 +712,6 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
spin_lock_init(&drvdata->spinlock);

drvdata->buffer_depth = etb_get_buffer_depth(drvdata);
- pm_runtime_put(&adev->dev);

if (drvdata->buffer_depth & 0x80000000)
return -EINVAL;
@@ -747,6 +738,7 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
if (ret)
goto err_misc_register;

+ pm_runtime_put(&adev->dev);
return 0;

err_misc_register:
--
2.7.4
\
 
 \ /
  Last update: 2019-04-15 18:09    [W:0.214 / U:3.148 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site