From 143e92c2248c24712e453aef2a43fbe164d37d37 Mon Sep 17 00:00:00 2001 From: Mathieu Poirier Date: Tue, 3 May 2016 11:33:41 -0600 Subject: 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: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman (cherry picked from commit b5af0a26da84b75376706a92c7a58036a0bf3541) --- drivers/hwtracing/coresight/coresight-etb10.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c index 2461d5c8c157..b0d402dbfeae 100644 --- a/drivers/hwtracing/coresight/coresight-etb10.c +++ b/drivers/hwtracing/coresight/coresight-etb10.c @@ -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. -- cgit v1.2.3