| Message ID | 20240626022537.1887219-1-quic_jiegan@quicinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] Coresight: Set correct cs_mode for TPDM to fix disable issue | expand |
On Wed, Jun 26, 2024 at 10:25:36AM +0800, Jie Gan wrote: > The coresight_disable_source_sysfs function should verify the > mode of the coresight device before disabling the source. > > However, the mode for the TPDM device is always set to > CS_MODE_DISABLED, resulting in the check consistently failing. > As a result, TPDM cannot be properly disabled. > > Configure CS_MODE_SYSFS/CS_MODE_PERF during the enablement. > Configure CS_MODE_DISABLED during the disablement. > > Fixes: b3c71626a933 ("Coresight: Add coresight TPDM source driver") > Signed-off-by: Jie Gan <quic_jiegan@quicinc.com> > --- > drivers/hwtracing/coresight/coresight-tpdm.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c > index a9708ab0d488..90a5105f6199 100644 > --- a/drivers/hwtracing/coresight/coresight-tpdm.c > +++ b/drivers/hwtracing/coresight/coresight-tpdm.c > @@ -449,6 +449,11 @@ static int tpdm_enable(struct coresight_device *csdev, struct perf_event *event, > return -EBUSY; > } > > + if (!coresight_take_mode(csdev, mode)) { > + spin_unlock(&drvdata->spinlock); > + return -EBUSY; > + } > + > __tpdm_enable(drvdata); > drvdata->enable = true; > spin_unlock(&drvdata->spinlock); > @@ -506,6 +511,7 @@ static void tpdm_disable(struct coresight_device *csdev, > } > > __tpdm_disable(drvdata); > + coresight_set_mode(csdev, CS_MODE_DISABLED); > drvdata->enable = false; > spin_unlock(&drvdata->spinlock); > > -- > 2.34.1 > Please ignore this patch. This patch should be included by an independent email. I will correct it and send it later. Thanks Jie >
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index a9708ab0d488..90a5105f6199 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -449,6 +449,11 @@ static int tpdm_enable(struct coresight_device *csdev, struct perf_event *event, return -EBUSY; } + if (!coresight_take_mode(csdev, mode)) { + spin_unlock(&drvdata->spinlock); + return -EBUSY; + } + __tpdm_enable(drvdata); drvdata->enable = true; spin_unlock(&drvdata->spinlock); @@ -506,6 +511,7 @@ static void tpdm_disable(struct coresight_device *csdev, } __tpdm_disable(drvdata); + coresight_set_mode(csdev, CS_MODE_DISABLED); drvdata->enable = false; spin_unlock(&drvdata->spinlock);
The coresight_disable_source_sysfs function should verify the mode of the coresight device before disabling the source. However, the mode for the TPDM device is always set to CS_MODE_DISABLED, resulting in the check consistently failing. As a result, TPDM cannot be properly disabled. Configure CS_MODE_SYSFS/CS_MODE_PERF during the enablement. Configure CS_MODE_DISABLED during the disablement. Fixes: b3c71626a933 ("Coresight: Add coresight TPDM source driver") Signed-off-by: Jie Gan <quic_jiegan@quicinc.com> --- drivers/hwtracing/coresight/coresight-tpdm.c | 6 ++++++ 1 file changed, 6 insertions(+)