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authorKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>2023-05-17 18:37:49 +0200
committerVinod Koul <vkoul@kernel.org>2023-05-29 10:49:46 +0530
commit9f9914b178a7935d2d94ee3e1bf55f2b42b18528 (patch)
treef9c285af9f0ce49f36122cf89b1a0d293a68bbb9 /mm/ptdump.c
parent4830bfa2c812689e6007f42536eeb86df08f9d29 (diff)
soundwire: qcom: fix unbalanced pm_runtime_put()
This reverts commit 57ed510b0547 ("soundwire: qcom: use pm_runtime_resume_and_get()") which introduced unbalanced pm_runtime_put(), when device did not have runtime PM enabled. If pm_runtime_resume_and_get() failed with -EACCES, the driver continued execution and finally called pm_runtime_put_autosuspend(). Since pm_runtime_resume_and_get() drops the usage counter on every error, this lead to double decrement of that counter visible in certain debugfs actions on unattached devices (still in reset state): $ cat /sys/kernel/debug/soundwire/master-0-0/sdw:0:0217:f001:00:0/registers qcom-soundwire 3210000.soundwire-controller: swrm_wait_for_wr_fifo_avail err write overflow soundwire sdw-master-0: trf on Slave 1 failed:-5 read addr e36 count 1 soundwire sdw:0:0217:f001:00:0: Runtime PM usage count underflow! Fixes: 57ed510b0547 ("soundwire: qcom: use pm_runtime_resume_and_get()") Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20230517163750.997629-1-krzysztof.kozlowski@linaro.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
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