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coresight: etf: Release CLAIM tag after disabling the HW

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This patch rectifies the sequence of events in function
tmc_etb_disable_hw() by disabling the HW first and then releasing the
CLAIM tag.  Otherwise we could be corrupting the configuration done by an
external agent that would have claimed the device after we have released
it.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier 2018-11-30 11:43:04 -07:00 • committed by Greg Kroah-Hartman
parent acaf5a06b9
commit 32c58c4d3b
1 changed files with 1 additions and 1 deletions
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2
drivers/hwtracing/coresight/coresight-tmc-etf.c
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@ -86,8 +86,8 @@ static void __tmc_etb_disable_hw(struct tmc_drvdata *drvdata)
static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata) static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata)
{ {
coresight_disclaim_device(drvdata->base);
__tmc_etb_disable_hw(drvdata); __tmc_etb_disable_hw(drvdata);
coresight_disclaim_device(drvdata->base);
} }
static void __tmc_etf_enable_hw(struct tmc_drvdata *drvdata) static void __tmc_etf_enable_hw(struct tmc_drvdata *drvdata)