linux-kernel - [PATCH 5.14 188/849] coresight: trbe: Fix incorrect access of the sink specific data

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Date:   Mon, 15 Nov 2021 17:54:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Suzuki K Poulose <suzuki.poulose@....com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>
Subject: [PATCH 5.14 188/849] coresight: trbe: Fix incorrect access of the sink specific data

From: Suzuki K Poulose <suzuki.poulose@....com>

commit bb5293e334af51b19b62d8bef1852ea13e935e9b upstream.

The TRBE driver wrongly treats the aux private data as the TRBE driver
specific buffer for a given perf handle, while it is the ETM PMU's
event specific data. Fix this by correcting the instance to use
appropriate helper.

Cc: stable <stable@...r.kernel.org>
Fixes: 3fbf7f011f24 ("coresight: sink: Add TRBE driver")
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>
Link: https://lore.kernel.org/r/20210921134121.2423546-2-suzuki.poulose@arm.com
[Fixed 13 character SHA down to 12]
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/hwtracing/coresight/coresight-trbe.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -366,7 +366,7 @@ static unsigned long __trbe_normal_offse
 
 static unsigned long trbe_normal_offset(struct perf_output_handle *handle)
 {
-	struct trbe_buf *buf = perf_get_aux(handle);
+	struct trbe_buf *buf = etm_perf_sink_config(handle);
 	u64 limit = __trbe_normal_offset(handle);
 	u64 head = PERF_IDX2OFF(handle->head, buf);