Re: [PATCH 8/9] riscv: print the unexpected interrupt cause

From: Nick Kossifidis <mick@ics.forth.gr>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-riscv@lists.infradead.org, Palmer Dabbelt <palmer@sifive.com>
Subject: Re: [PATCH 8/9] riscv: print the unexpected interrupt cause
Date: Thu, 11 Apr 2019 18:52:06 +0300	[thread overview]
Message-ID: <79115ffcf1cd752c3c0fed37c45d9b8d@mailhost.ics.forth.gr> (raw)
In-Reply-To: <20190411115623.5749-9-hch@lst.de>

Στις 2019-04-11 14:56, Christoph Hellwig έγραψε:
> This has been helpful when debugging my pending nommu port.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  arch/riscv/kernel/irq.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c
> index 48e6b7db83a1..b10af8ccd656 100644
> --- a/arch/riscv/kernel/irq.c
> +++ b/arch/riscv/kernel/irq.c
> @@ -54,7 +54,8 @@ asmlinkage void __irq_entry do_IRQ(struct pt_regs 
> *regs)
>  		handle_arch_irq(regs);
>  		break;
>  	default:
> -		panic("unexpected interrupt cause");
> +		pr_alert("unexpected interrupt cause 0x%lx", regs->xcause);
> +		BUG();
>  	}
>  	irq_exit();

Did you mean regs->scause ? There is no xcause field on struct pt_regs 
and
also there is no such register name:
https://github.com/torvalds/linux/blob/master/arch/riscv/include/asm/ptrace.h

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