| Message ID | 20200805025458.2978-20-tingwei@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | coresight: allow to build coresight as modules | expand |
On 08/05/2020 03:54 AM, Tingwei Zhang wrote: Missing, From:.... if this is authored by Mike Leach. > During module unload, a coresight driver module will call back into > the CTI driver to remove any links between the two devices. > > The current code has 2 issues:- > 1) in the CTI driver the matching code is matching to the wrong device > so misses all the links. > 2) The callback is called too late in the unload process resulting in a > crash. > > This fixes both the issues. > > Fixes: 177af8285b59 (coresight: cti: Enable CTI associated with devices) > Reported-by: Tingwei Zhang <tingwei@codeaurora.org> > Signed-off-by: Mike Leach <mike.leach@linaro.org> > Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org> > --- > drivers/hwtracing/coresight/coresight-cti.c | 2 +- > drivers/hwtracing/coresight/coresight.c | 4 ++-- > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti.c > index 1c34db7d1b1b..6bb06c5715db 100644 > --- a/drivers/hwtracing/coresight/coresight-cti.c > +++ b/drivers/hwtracing/coresight/coresight-cti.c > @@ -608,7 +608,7 @@ void cti_remove_assoc_from_csdev(struct coresight_device *csdev) > ctidrv = csdev_to_cti_drvdata(csdev->ect_dev); > ctidev = &ctidrv->ctidev; > list_for_each_entry(tc, &ctidev->trig_cons, node) { > - if (tc->con_dev == csdev->ect_dev) { > + if (tc->con_dev == csdev) { > cti_remove_sysfs_link(ctidrv, tc); > tc->con_dev = NULL; > break; > diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c > index 25578579559b..8b55383cfcf1 100644 > --- a/drivers/hwtracing/coresight/coresight.c > +++ b/drivers/hwtracing/coresight/coresight.c > @@ -1238,8 +1238,6 @@ static void coresight_device_release(struct device *dev) > { > struct coresight_device *csdev = to_coresight_device(dev); > > - if (cti_assoc_ops && cti_assoc_ops->remove) > - cti_assoc_ops->remove(csdev); > fwnode_handle_put(csdev->dev.fwnode); > kfree(csdev->refcnt); > kfree(csdev); > @@ -1574,6 +1572,8 @@ void coresight_unregister(struct coresight_device *csdev) > { > etm_perf_del_symlink_sink(csdev); > /* Remove references of that device in the topology */ > + if (cti_assoc_ops && cti_assoc_ops->remove) > + cti_assoc_ops->remove(csdev); Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti.c index 1c34db7d1b1b..6bb06c5715db 100644 --- a/drivers/hwtracing/coresight/coresight-cti.c +++ b/drivers/hwtracing/coresight/coresight-cti.c @@ -608,7 +608,7 @@ void cti_remove_assoc_from_csdev(struct coresight_device *csdev) ctidrv = csdev_to_cti_drvdata(csdev->ect_dev); ctidev = &ctidrv->ctidev; list_for_each_entry(tc, &ctidev->trig_cons, node) { - if (tc->con_dev == csdev->ect_dev) { + if (tc->con_dev == csdev) { cti_remove_sysfs_link(ctidrv, tc); tc->con_dev = NULL; break; diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 25578579559b..8b55383cfcf1 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -1238,8 +1238,6 @@ static void coresight_device_release(struct device *dev) { struct coresight_device *csdev = to_coresight_device(dev); - if (cti_assoc_ops && cti_assoc_ops->remove) - cti_assoc_ops->remove(csdev); fwnode_handle_put(csdev->dev.fwnode); kfree(csdev->refcnt); kfree(csdev); @@ -1574,6 +1572,8 @@ void coresight_unregister(struct coresight_device *csdev) { etm_perf_del_symlink_sink(csdev); /* Remove references of that device in the topology */ + if (cti_assoc_ops && cti_assoc_ops->remove) + cti_assoc_ops->remove(csdev); coresight_remove_conns(csdev); coresight_clear_default_sink(csdev); coresight_release_platform_data(csdev, csdev->pdata);