linux-kernel - Re: [PATCH] MIPS: OCTEON: irq: Fix octeon_irq_force_ciu

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Date:   Wed, 7 Sep 2022 15:08:48 +0200
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Alexander A Sverdlin <alexander.sverdlin@...ia.com>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MIPS: OCTEON: irq: Fix octeon_irq_force_ciu_mapping()

On Tue, Sep 06, 2022 at 11:59:43AM +0200, Alexander A Sverdlin wrote:
> From: Alexander Sverdlin <alexander.sverdlin@...ia.com>
> 
> For irq_domain_associate() to work the virq descriptor has to be
> pre-allocated in advance. Otherwise the following happens:
> 
> WARNING: CPU: 0 PID: 0 at .../kernel/irq/irqdomain.c:527 irq_domain_associate+0x298/0x2e8
> error: virq128 is not allocated
> Modules linked in:
> CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.78-... #1
>         ...
> Call Trace:
> [<ffffffff801344c4>] show_stack+0x9c/0x130
> [<ffffffff80769550>] dump_stack+0x90/0xd0
> [<ffffffff801576d0>] __warn+0x118/0x130
> [<ffffffff80157734>] warn_slowpath_fmt+0x4c/0x70
> [<ffffffff801b83c0>] irq_domain_associate+0x298/0x2e8
> [<ffffffff80a43bb8>] octeon_irq_init_ciu+0x4c8/0x53c
> [<ffffffff80a76cbc>] of_irq_init+0x1e0/0x388
> [<ffffffff80a452cc>] init_IRQ+0x4c/0xf4
> [<ffffffff80a3cc00>] start_kernel+0x404/0x698
> 
> Use irq_alloc_desc_at() to avoid the above problem.
> 
> Signed-off-by: Alexander Sverdlin <alexander.sverdlin@...ia.com>
> ---
>  arch/mips/cavium-octeon/octeon-irq.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)

applied to mips-fixes.

Thomas.

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