Commit 82a9c908 authored by Committed by ROOL
Ensure IIC bus list is fully initialised
IICInit only initialises the entries for valid IIC buses (i.e up to the limit returned by HAL_IICBuses), but some code accesses the array without checking against the HAL_IICBuses limit. This causes problems because the array lives in the SkippedTables area of workspace, meaning it isn't zero-initialised automatically. Ensure that the entries for the invalid bus numbers are zero-initialised, so that code which doesn't check against HAL_IICBuses won't mistake the invalid entries for valid IRQ-driven buses (InitialiseIRQ1Vtable, Reset_IRQ_Handler, etc.) Also, protect against overwriting the end of the array if HAL_IICBuses is more than the OS supports. Fixes hang on startup on Pi 4 if memory is filled with -1 (and OS is told that RAM isn't clear), and on Pi400 with normal memory: https://www.riscosopen.org/forum/forums/11/topics/16313 Version 6.55. Tagged as 'Kernel-6_55'
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