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-rw-r--r--drivers/hwtracing/coresight/coresight-etb10.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 92f942321e1e..4d20b0be0c0b 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -428,7 +428,8 @@ static void etb_update_buffer(struct coresight_device *csdev,
read_ptr = (write_ptr + drvdata->buffer_depth) -
to_read / ETB_FRAME_SIZE_WORDS;
/* Wrap around if need be*/
- read_ptr &= ~(drvdata->buffer_depth - 1);
+ if (read_ptr > (drvdata->buffer_depth - 1))
+ read_ptr -= drvdata->buffer_depth;
/* let the decoder know we've skipped ahead */
local_inc(&buf->lost);
}