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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2018-09-20 13:18:14 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-25 20:09:19 +0200 |
| commit | f92201b1ab95b3f17c3fa9df8f88dc521e0b604f (patch) | |
| tree | 2aac53008737e605c99280d68bd42abb89326ba6 /drivers/hwtracing | |
| parent | f13d7c0835c383e318e28cc9f34b002fc8c85f61 (diff) | |
| download | linux-f92201b1ab95b3f17c3fa9df8f88dc521e0b604f.tar.gz linux-f92201b1ab95b3f17c3fa9df8f88dc521e0b604f.tar.bz2 linux-f92201b1ab95b3f17c3fa9df8f88dc521e0b604f.zip | |
coresight: catu: Claim device before use
Use the CLAIM protocol to grab the ownership of the component when
in use.
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-catu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c index ff94e58845b7..170fbb66bda2 100644 --- a/drivers/hwtracing/coresight/coresight-catu.c +++ b/drivers/hwtracing/coresight/coresight-catu.c @@ -406,6 +406,7 @@ static inline int catu_wait_for_ready(struct catu_drvdata *drvdata) static int catu_enable_hw(struct catu_drvdata *drvdata, void *data) { + int rc; u32 control, mode; struct etr_buf *etr_buf = data; @@ -418,6 +419,10 @@ static int catu_enable_hw(struct catu_drvdata *drvdata, void *data) return -EBUSY; } + rc = coresight_claim_device_unlocked(drvdata->base); + if (rc) + return rc; + control |= BIT(CATU_CONTROL_ENABLE); if (etr_buf && etr_buf->mode == ETR_MODE_CATU) { @@ -459,6 +464,7 @@ static int catu_disable_hw(struct catu_drvdata *drvdata) int rc = 0; catu_write_control(drvdata, 0); + coresight_disclaim_device_unlocked(drvdata->base); if (catu_wait_for_ready(drvdata)) { dev_info(drvdata->dev, "Timeout while waiting for READY\n"); rc = -EAGAIN; |