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coresight: etb10: Fix check for bogus buffer depth

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We attempt to sanity check the buffer depth reported by the hardware by
making sure it is not less than zero however this check will never be true
since the buffer depth is stored in an unsigned integer. Instead change
the check to look for the top bit being set which was the intention.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mark Brown 2015-04-10 09:25:37 -06:00 committed by Greg Kroah-Hartman
parent cc5454490b
commit f5da7cb24b
1 changed files with 1 additions and 1 deletions
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drivers/hwtracing/coresight/coresight-etb10.c
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@ -457,7 +457,7 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
drvdata->buffer_depth = etb_get_buffer_depth(drvdata);
clk_disable_unprepare(drvdata->clk);
if (drvdata->buffer_depth < 0)
if (drvdata->buffer_depth & 0x80000000)
return -EINVAL;
drvdata->buf = devm_kzalloc(dev,