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a8ec3ee861
ARC cores on reset have all interrupt lines of built-in INTC enabled. Which means once we globally enable interrupts (very early on boot) faulty hardware blocks may trigger an interrupt that Linux kernel cannot handle yet as corresponding handler is not yet installed. In that case system falls in "interrupt storm" and basically never does anything useful except entering and exiting generic IRQ handling code. One real example of that kind of problematic hardware is DW GMAC which also has interrupts enabled on reset and if Ethernet PHY informs GMAC about link state, GMAC immediately reports that upstream to ARC core and here we are. Now with that change we mask all individual IRQ lines making entire system more fool-proof. [This patch was motivated by Adaptrum platform support] Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Eugeniy Paltsev <paltsev@synopsys.com> Tested-by: Alexandru Gagniuc <alex.g@adaptrum.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> |
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| Makefile | ||