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coresight: Cleanup coresight_remove_conns

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When a device is unregistered, we remove all connection
references to it, by searching the connection records of
all devices in the coresight bus, via coresight_remove_conns.
We could avoid searching if this device doesn't have an input
port (e.g, a source). Also document the purpose of the function.

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>
This commit is contained in:
Suzuki K Poulose 2019-06-19 13:52:58 -06:00 committed by Greg Kroah-Hartman
parent 2ede79a6e8
commit d2998dc1f9
1 changed files with 13 additions and 2 deletions
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15
drivers/hwtracing/coresight/coresight.c
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@ -1096,10 +1096,21 @@ static int coresight_remove_match(struct device *dev, void *data)
return 0;
}
/*
* coresight_remove_conns - Remove references to this given devices
* from the connections of other devices.
*/
static void coresight_remove_conns(struct coresight_device *csdev)
{
bus_for_each_dev(&coresight_bustype, NULL,
csdev, coresight_remove_match);
/*
* Another device will point to this device only if there is
* an output port connected to this one. i.e, if the device
* doesn't have at least one input port, there is no point
* in searching all the devices.
*/
if (csdev->nr_inport)
bus_for_each_dev(&coresight_bustype, NULL,
csdev, coresight_remove_match);
}
/**