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    Subject[PATCH 5.14 188/849] coresight: trbe: Fix incorrect access of the sink specific data
    Date
    From: Suzuki K Poulose <suzuki.poulose@arm.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@vger.kernel.org>
    Fixes: 3fbf7f011f24 ("coresight: sink: Add TRBE driver")
    Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
    Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.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@linaro.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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);


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