diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2019-04-25 13:52:47 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-25 22:00:15 +0200 |
| commit | 850ccfe3e891b668605a663c7024c3f187443c76 (patch) | |
| tree | 80d5c99398e469f66e93c17d72996d8a14145588 /drivers/hwtracing | |
| parent | 1b015ef28a443a89985db2a67080bf7c660d66d2 (diff) | |
| download | linux-850ccfe3e891b668605a663c7024c3f187443c76.tar.bz2 | |
coresight: etb10: Cleanup power management
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>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etb10.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c index 105782ea64c7..13c0a601d3be 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: |