diff options
| author |   Suzuki K Poulose <suzuki.poulose@arm.com> | 2018-09-20 13:18:09 -0600 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-25 20:09:18 +0200 |
| commit | 62563e84a8c9c682e07b8cce8678e583a24be504 (patch) | |
| tree | e2e0ba55e89a87e928bcf4af31b6a1831d7cde64 /drivers/hwtracing | |
| parent | coresight: etm3: Add support for handling errors (diff) | |
| download | linux-dev-62563e84a8c9c682e07b8cce8678e583a24be504.tar.xz linux-dev-62563e84a8c9c682e07b8cce8678e583a24be504.zip | |
coresight: etb10: Handle errors enabling the device
Prepare the etb10 driver to return errors in enabling
the device.
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 | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c index 08fa660098f8..824be0c5f592 100644 --- a/drivers/hwtracing/coresight/coresight-etb10.c +++ b/drivers/hwtracing/coresight/coresight-etb10.c @@ -106,7 +106,7 @@ static unsigned int etb_get_buffer_depth(struct etb_drvdata *drvdata) return depth; } -static void etb_enable_hw(struct etb_drvdata *drvdata) +static void __etb_enable_hw(struct etb_drvdata *drvdata) { int i; u32 depth; @@ -134,6 +134,12 @@ static void etb_enable_hw(struct etb_drvdata *drvdata) CS_LOCK(drvdata->base); } +static int etb_enable_hw(struct etb_drvdata *drvdata) +{ + __etb_enable_hw(drvdata); + return 0; +} + static int etb_enable_sysfs(struct coresight_device *csdev) { int ret = 0; @@ -152,8 +158,9 @@ static int etb_enable_sysfs(struct coresight_device *csdev) if (drvdata->mode == CS_MODE_SYSFS) goto out; - drvdata->mode = CS_MODE_SYSFS; - etb_enable_hw(drvdata); + ret = etb_enable_hw(drvdata); + if (!ret) + drvdata->mode = CS_MODE_SYSFS; out: spin_unlock_irqrestore(&drvdata->spinlock, flags); @@ -183,8 +190,9 @@ static int etb_enable_perf(struct coresight_device *csdev, void *data) if (ret) goto out; - drvdata->mode = CS_MODE_PERF; - etb_enable_hw(drvdata); + ret = etb_enable_hw(drvdata); + if (!ret) + drvdata->mode = CS_MODE_PERF; out: spin_unlock_irqrestore(&drvdata->spinlock, flags); |