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coresight: byte-cntr: Add ETR status check in bypass notifier

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Add ETR status check while receiving USB_QDSS_CONNECT event.
Otherwise, there will cause crash due to NULL pointer issue.
Since ETR buffer will be released if ETR is disabled.

Change-Id: I358d25477c938844df5bff5c29ddbee307b770e3
Signed-off-by: Tao Zhang <taozha@codeaurora.org>
This commit is contained in:
Tao Zhang 2021-05-19 14:31:20 +08:00
commit e97e4f01dd
1 changed files with 5 additions and 0 deletions
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5
drivers/hwtracing/coresight/coresight-byte-cntr.c
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@ -630,6 +630,11 @@ void usb_bypass_notifier(void *priv, unsigned int event,
switch (event) {
case USB_QDSS_CONNECT:
if (tmcdrvdata->mode == CS_MODE_DISABLED) {
dev_err_ratelimited(&tmcdrvdata->csdev->dev,
"%s: ETR is disabled.\n", __func__);
return;
}
ret = usb_bypass_start(drvdata);
if (ret < 0)
return;