arch/arm/sama5: Fix OHCI SchedulingOverrun interrupt storm. #9215
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The following message is printed continuously and the nsh shell is unusable on sama5d3-xplained. "OHCI ERROR: Unhandled interrupts pending: 000001". This happens when a keyboard is removed and reinserted on port3 (lower port) while a bluetooth dongle is in port2.
xiaoxiang781216
approved these changes
May 9, 2023
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Summary
The following message is printed continuously and the nsh shell is unusable on sama5d3-xplained.
"OHCI ERROR: Unhandled interrupts pending: 000001". This happens when a keyboard is removed and reinserted on port3 (lower port) while a bluetooth dongle is in port2.
Impact
Less OHCI bugs on sama5
Testing
There are probably many ways to trigger this bug.
Unplugging a USB keyboard and quickly reinserting it causes the message (see above) to be printed forever. NuttX has to start with both the keyboard and BT dongle plugged in.