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authorHarsha Priya <harshapriya.n@intel.com>2020-09-30 13:41:39 +0200
committerTakashi Iwai <tiwai@suse.de>2020-09-30 16:52:48 +0200
commita0645daf16101bb9a6d87598c17e9a8b7bd60ea7 (patch)
tree59a61c0248b82ca63c4cca82ad45f1cb498c06d2 /crypto/ecdh.c
parentALSA: hda - Don't register a cb func if it is registered already (diff)
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ALSA: HDA: Early Forbid of runtime PM
For certain codecs (like Realtek), pm_runtime_forbid() is invoked in the probe function after build_controls(). In a stress test, its observed occasionally that runtime PM calls are invoked before controls are built. This causes the codec to be runtime suspended before probe completes. Because of this, not all controls are enumerated correctly, and audio does not work until system is rebooted. This issue being common across all codecs, pm_runtime_forbid() is called when the codec object is created to fix this issue. A codec enables or disables runtime pm in its own probe function. Multiple stress tests of 2000+ cycles has been done to test the fix. Signed-off-by: Harsha Priya <harshapriya.n@intel.com> Signed-off-by: Emmanuel Jillela <emmanuel.jillela@intel.com> Reviewed-by: Kailang Yang <kailang@realtek.com> Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Link: https://lore.kernel.org/r/20200930114140.3839617-2-kai.vehmanen@linux.intel.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
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