[PATCH 0/2] Fix v4.11 malta_defconfig regressions

Matt Redfearn
2017-03-31T11:05:42Z

Since v4.11-rc1, 3 regressions have been observed on the Malta platform,
using malta_defconfig. which prevent it booting. These patches fix 2 of
them. The third one is that malta_defconfig, which uses SMP-MT, no
longer sets up its IPIs correctly resulting is a string of messages
like:

irq 23: nobody cared (try booting with the "irqpoll" option)
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W 4.11.0-rc4 #421
Stack : 00000000 00000000 00000000 00000000 807cdff2 00000047 00000000 0000003d
80741327 8f093194 806c191c 00000000 00000001 807c9acc 80756078 807d0000
807cdbe4 80177c78 00000003 0000003c 00000006 80177a04 806c70a8 8f02be8c
00000006 801b4c8c 00000000 00000000 ffffffff 00000000 8f02be8c 80740000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
...
Call Trace:
[<8010c6c0>] show_stack+0x88/0xa4
[<80380fb8>] dump_stack+0x88/0xd0
[<8017cf64>] __report_bad_irq+0x48/0x108
[<8017d2d4>] note_interrupt+0x1c0/0x2fc
[<80179ed4>] handle_irq_event_percpu+0x4c/0x64
[<8017eafc>] handle_percpu_irq+0x88/0xb8
[<801791c0>] generic_handle_irq+0x40/0x58
[<80108664>] do_IRQ+0x18/0x24
[<803b83fc>] plat_irq_dispatch+0x54/0xa8
handlers:
Disabling IRQ #23

This regression is fixed by Paul Burtons series "MIPS/irqchip: Use IPI
IRQ domains for CPU interrupt controller IPIs", but it is a large change
for this stage in the cycle so I don't know how best to proceed with
that one.

Matt Redfearn (2):
MIPS: Malta: Fix i8259 irqchip setup
irqchip/mips-gic: Fix Local compare interrupt

arch/mips/mti-malta/malta-int.c | 13 +++++++++++++
drivers/irqchip/irq-mips-gic.c | 4 ++++
2 files changed, 17 insertions(+)

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2.7.4