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authorKhalid Zubair <kzubair@cyngn.com>2016-05-17 15:22:32 -0700
committerGerrit Code Review <gerrit@cyanogenmod.org>2016-05-18 12:04:09 -0700
commit234fb3b03cd4c979286981cf77fef481700a329b (patch)
treea00bfcd795060a996761d8bc33864dc3178ec197 /api
parent507b3a7b6699ee6c4fb759d6a46396adc198af31 (diff)
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usb: ensure accessory detached sent on re-attach
It's possible for USB state change events to get swallowed if the cable is reconnected quickly because state changes are de-bounced with a 1 second interval. As a result an accessory detached event will not be sent if it re-attaches quickly. However, UsbDeviceManager will send an attached event when the USB connection is configured. This causes apps to misbehave and attempt to open the accessory without closing the previous one. The call to openAccessory fails (with EBUSY) because the underlying /dev/usb_accessory chardev is already open exclusively by the first accessory. Fix this issue by sending a detached event before sending an attached event if the previous accessory was not cleaned up properly. This change fixes a failure in CTSVerifier's USB Accessory Test where the test fails if you reconnect the USB cable quickly. OPO-688, FEIJ-471 Change-Id: I49690553213e866d200da1fb22c83348c6eb3491
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