Ignore disabled Kinetis USB endpoint interrupts

[c1728p9]

Description

Ignore interrupts on disabled USB endpoints. This prevents handling interrupts when in the wrong state.

Prior to this patch when running the serial test on a K64F the assert on line 908 of USBDevice.cpp would sometimes be triggered. This assert indicates that an endpoint 0 IN interrupt occurred before the device was ready.

This occurs during the test_cdc_usb_reconnect test when the host sends a "Set Control Line State" USB request and the device acknowledges it just before USB is disconnected.

Pull request type

[x] Fix
[ ] Refactor
[ ] Target update
[ ] Functionality change
[ ] Docs update
[ ] Test update
[ ] Breaking change

[c1728p9]

This fixes failures here:
#7755

[0xc0170]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 3512
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/8596/

Triggering tests

/morph test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 3131
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/8596/

[mbed-ci]

Test : FAILURE

Build number : 3298
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8596/3298

[0xc0170]

/morph test

[mbed-ci]

Test : FAILURE

Build number : 3303
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8596/3303

[cmonr]

I find this re-result highly suspect. Don't think it's related to the PR, but it's exactly the same...

Going to rerun once more, but if it fails, @c1728p9 you'll need to look into it. Maybe the branch needs a rebase?

/morph test

[mbed-ci]

Test : FAILURE

Build number : 3309
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8596/3309

[cmonr]

@c1728p9 When was the last time the feature branch was rebased?

[c1728p9]

@cmonr I think it was about a month ago.

[cmonr]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 3537
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/8596/

Triggering tests

/morph test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 3148
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/8596/

[mbed-ci]

Test : FAILURE

Build number : 3321
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8596/3321

[NirSonnenschein]

failure seems unrelated, retrying :
/morph build

[mbed-ci]

Build : SUCCESS

Build number : 3542
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/8596/

Triggering tests

/morph test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 3153
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/8596/

[mbed-ci]

Test : SUCCESS

Build number : 3326
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8596/3326