On Tue, Jun 05, 2018 at 10:43:17PM +0100, Suzuki K Poulose wrote:
> If we fail to find the input / output port for a LINK component
> while enabling a path, we should fail gracefully rather than
> assuming port "0".
>
> Cc: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> ---
> drivers/hwtracing/coresight/coresight.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
> index 69e9136..3c1c058 100644
> --- a/drivers/hwtracing/coresight/coresight.c
> +++ b/drivers/hwtracing/coresight/coresight.c
> @@ -107,7 +107,7 @@ static int coresight_find_link_inport(struct coresight_device *csdev,
> dev_err(&csdev->dev, "couldn't find inport, parent: %s, child: %s\n",
> dev_name(&parent->dev), dev_name(&csdev->dev));
>
> - return 0;
> + return -ENODEV;
> }
>
> static int coresight_find_link_outport(struct coresight_device *csdev,
> @@ -125,7 +125,7 @@ static int coresight_find_link_outport(struct coresight_device *csdev,
> dev_err(&csdev->dev, "couldn't find outport, parent: %s, child: %s\n",
> dev_name(&csdev->dev), dev_name(&child->dev));
>
> - return 0;
> + return -ENODEV;
> }
>
> static int coresight_enable_sink(struct coresight_device *csdev, u32 mode)
> @@ -178,6 +178,9 @@ static int coresight_enable_link(struct coresight_device *csdev,
> else
> refport = 0;
>
> + if (refport < 0)
> + return refport;
> +
> if (atomic_inc_return(&csdev->refcnt[refport]) == 1) {
> if (link_ops(csdev)->enable) {
> ret = link_ops(csdev)->enable(csdev, inport, outport);
Queued for the next rc - no need to resend.
Thanks,
Mathieu
> --
> 2.7.4
>
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