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Merge "coresight-tmc-etr: Fix deadlock issue while switching mode"

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qctecmdr 2021-03-22 00:50:46 -07:00 • committed by Gerrit - the friendly Code Review server
commit 09f4de94dc
1 changed files with 4 additions and 2 deletions
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6
drivers/hwtracing/coresight/coresight-tmc-etr.c
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@ -2102,23 +2102,25 @@ int tmc_etr_switch_mode(struct tmc_drvdata *drvdata, const char *out_mode)
return 0;
}
mutex_unlock(&drvdata->mem_lock);
coresight_disable_all_source_link();
mutex_lock(&drvdata->mem_lock);
_tmc_disable_etr_sink(drvdata->csdev, true);
old_mode = drvdata->out_mode;
drvdata->out_mode = new_mode;
if (tmc_enable_etr_sink_sysfs(drvdata->csdev)) {
drvdata->out_mode = old_mode;
tmc_enable_etr_sink_sysfs(drvdata->csdev);
mutex_unlock(&drvdata->mem_lock);
coresight_enable_all_source_link();
dev_err(&drvdata->csdev->dev,
"Switch to %s failed. Fall back to %s.\n",
str_tmc_etr_out_mode[new_mode],
str_tmc_etr_out_mode[old_mode]);
mutex_unlock(&drvdata->mem_lock);
return -EINVAL;
}
coresight_enable_all_source_link();
mutex_unlock(&drvdata->mem_lock);
coresight_enable_all_source_link();
return 0;
}