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coresight tmc etr: Make memory check consistent in the same function

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While operating from sysFS the TMC-ETR driver needs to make sure it has
memory to work with but doesn't allocate memory uselessly either.  Since
the main memory handle for this driver is drvdata::vaddr, use it throughout
function tmc_enable_etr_sink_sysfs() so that things are consistent.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier 2018-05-09 12:06:05 -06:00 committed by Greg Kroah-Hartman
parent ad0dfdfd87
commit 3606a1dcb4
1 changed files with 2 additions and 2 deletions
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4
drivers/hwtracing/coresight/coresight-tmc-etr.c
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@ -153,11 +153,11 @@ static int tmc_enable_etr_sink_sysfs(struct coresight_device *csdev)
goto out;
/*
* If drvdata::buf == NULL, use the memory allocated above.
* If drvdata::vaddr == NULL, use the memory allocated above.
* Otherwise a buffer still exists from a previous session, so
* simply use that.
*/
if (drvdata->buf == NULL) {
if (drvdata->vaddr == NULL) {
used = true;
drvdata->vaddr = vaddr;
drvdata->paddr = paddr;