Unverified Commit 1e90de2c authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Mark Brown
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ASoC: SOF: ipc3-dtrace: Return from dtrace_read if there is no new data available 



If no new trace data is available then return immediately, there is no
need to continue with the execution of the trace_read() function.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: default avatarBard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220610080119.30880-4-peter.ujfalusi@linux.intel.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b66f9e70

sound/soc/sof/ipc3-dtrace.c

+4 −0
Original line number Diff line number Diff line
@@ -353,6 +353,10 @@ static ssize_t dfsentry_dtrace_read(struct file *file, char __user *buffer, 
		return -EIO;

	}



	/* no new trace data */

	if (!avail)

		return 0;



	/* make sure count is <= avail */

	if (count > avail)

		count = avail;