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intel_th: Use real device index in the node names

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Most of the intel_th core supports multiple co-existing TH devices,
except for output device nodes, where intel_th device id is hardcoded
to be zero.

Fix this by fetching the actual intel_th device id from the parent
device's drvdata.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Shishkin 2016-02-15 19:12:00 +02:00 committed by Greg Kroah-Hartman
parent d7b1787161
commit 14136e368f
1 changed files with 20 additions and 3 deletions
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23
drivers/hwtracing/intel_th/core.c
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@ -124,17 +124,34 @@ static struct device_type intel_th_source_device_type = {
.release = intel_th_device_release,
};
static struct intel_th *to_intel_th(struct intel_th_device *thdev)
{
/*
* subdevice tree is flat: if this one is not a switch, its
* parent must be
*/
if (thdev->type != INTEL_TH_SWITCH)
thdev = to_intel_th_hub(thdev);
if (WARN_ON_ONCE(!thdev || thdev->type != INTEL_TH_SWITCH))
return NULL;
return dev_get_drvdata(thdev->dev.parent);
}
static char *intel_th_output_devnode(struct device *dev, umode_t *mode,
kuid_t *uid, kgid_t *gid)
{
struct intel_th_device *thdev = to_intel_th_device(dev);
struct intel_th *th = to_intel_th(thdev);
char *node;
if (thdev->id >= 0)
node = kasprintf(GFP_KERNEL, "intel_th%d/%s%d", 0, thdev->name,
thdev->id);
node = kasprintf(GFP_KERNEL, "intel_th%d/%s%d", th->id,
thdev->name, thdev->id);
else
node = kasprintf(GFP_KERNEL, "intel_th%d/%s", 0, thdev->name);
node = kasprintf(GFP_KERNEL, "intel_th%d/%s", th->id,
thdev->name);
return node;
}