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Commit b5af0a26 authored by Mathieu Poirier's avatar Mathieu Poirier Committed by Greg Kroah-Hartman
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coresight: etb10: fixing the right amount of words to read 



This patch rectifies the amount of words to read when the internal
buffer is deemed bigger than the amount of space available in the
perf ring buffer.

The amount to read is set to the amount of space in the perf ring
buffer rather than being subtracted by it.

Reported-by: default avatarSuzuki K Poulose <Suzuki.Poulose@arm.com>
Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 237483aa

drivers/hwtracing/coresight/coresight-etb10.c

+1 −1
Original line number Diff line number Diff line
@@ -440,7 +440,7 @@ static void etb_update_buffer(struct coresight_device *csdev, 
		u32 mask = ~(ETB_FRAME_SIZE_WORDS - 1);



		/* The new read pointer must be frame size aligned */

		to_read -= handle->size & mask;

		to_read = handle->size & mask;

		/*

		 * Move the RAM read pointer up, keeping in mind that

		 * everything is in frame size units.