linux-kernel - Re: [PATCH] MIPS: microMIPS: Fix incorrect mask in insn_table

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Date:   Tue, 31 Oct 2017 07:08:05 +0000
From:   James Hogan <james.hogan@...s.com>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>
CC:     Ralf Baechle <ralf@...ux-mips.org>, <linux-mips@...ux-mips.org>,
        <linux-kernel@...r.kernel.org>, Julia Lawal <julia.lawall@...6.fr>
Subject: Re: [PATCH] MIPS: microMIPS: Fix incorrect mask in insn_table_MM

On Tue, Oct 31, 2017 at 12:35:03AM -0500, Gustavo A. R. Silva wrote:
> It seems that this is a typo error and the proper bit masking is
> "RT | RS" instead of "RS | RS".
> 
> This issue was detected with the help of Coccinelle.
> 
> Reported-by: Julia Lawall <julia.lawall@...6.fr>

May I suggest adding:
Fixes: d6b3314b49e1 ("MIPS: uasm: Add lh uam instruction")

> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>

Reviewed-by: James Hogan <jhogan@@kernel.org>

Probably worthy of a stable tag too (though there will be conflicts with
ce807d5f67ed309a6f357b88cc93185d89e921d3 before 4.13):
Cc: <stable@...r.kernel.org> # 3.16+

Thanks
James

> ---
>  arch/mips/mm/uasm-micromips.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/mips/mm/uasm-micromips.c b/arch/mips/mm/uasm-micromips.c
> index c28ff53..cdb5a19 100644
> --- a/arch/mips/mm/uasm-micromips.c
> +++ b/arch/mips/mm/uasm-micromips.c
> @@ -80,7 +80,7 @@ static const struct insn const insn_table_MM[insn_invalid] = {
>  	[insn_jr]	= {M(mm_pool32a_op, 0, 0, 0, mm_jalr_op, mm_pool32axf_op), RS},
>  	[insn_lb]	= {M(mm_lb32_op, 0, 0, 0, 0, 0), RT | RS | SIMM},
>  	[insn_ld]	= {0, 0},
> -	[insn_lh]	= {M(mm_lh32_op, 0, 0, 0, 0, 0), RS | RS | SIMM},
> +	[insn_lh]	= {M(mm_lh32_op, 0, 0, 0, 0, 0), RT | RS | SIMM},
>  	[insn_ll]	= {M(mm_pool32c_op, 0, 0, (mm_ll_func << 1), 0, 0), RS | RT | SIMM},
>  	[insn_lld]	= {0, 0},
>  	[insn_lui]	= {M(mm_pool32i_op, mm_lui_op, 0, 0, 0, 0), RS | SIMM},
> -- 
> 2.7.4
> 
> 

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