coresight: etm4x: Ensure valid drvdata and clock before clk_put()

This validates 'drvdata' and 'drvdata->pclk' clock before calling clk_put()
in etm4_remove_platform_dev(). The problem was detected using Smatch static
checker as reported.

Fixes: 73d779a03a76a ("coresight: etm4x: Change etm4_platform_driver driver for MMIO devices")
Cc: Suzuki K Poulose <[email protected]>
Cc: Mike Leach <[email protected]>
Cc: James Clark <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Reported-by: Dan Carpenter <[email protected]>
Closes: https://lists.linaro.org/archives/list/[email protected]/thread/G4N6P4OXELPLLQSNU3GU2MR4LOLRXRMJ/
Reviewed-by: James Clark <[email protected]>
Reviewed-by: Mike Leach <[email protected]>
Signed-off-by: Anshuman Khandual <[email protected]>
Signed-off-by: Suzuki K Poulose <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

0 files changed, 0 insertions, 0 deletions