coresight: etm: Clean up device specific data

Hello Suzuki K Poulose,

This is a semi-automatic email about new static checker warnings.

The patch 21d26b905c05: "coresight: etm: Clean up device specific data" from May 22, 2019, leads to the following Smatch complaint:

./drivers/hwtracing/coresight/coresight-etm3x.c:460 etm_get_trace_id()
warn: variable dereferenced before check 'drvdata' (see line 458)

./drivers/hwtracing/coresight/coresight-etm3x.c
457 int trace_id = -1;

   458		struct device *etm_dev = drvdata->csdev->dev.parent;
                                         ^^^^^^^^^

New dereference

459
460 if (!drvdata)

                    ^^^^^^^^

Checked too late. Delete the check?

461 goto out;
462

regards,
dan carpenter

Hi Dan

Thanks for the report. I have sent a patch to fix it.

Cheers
Suzuki

Thanks!

regards,
dan carpenter