linux-kernel - Re: [BISECTED REGRESSION] b43legacy broken on G4 PowerBook

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Message-ID: <87ftogau95.fsf@igel.home>
Date:   Tue, 11 Jun 2019 19:48:06 +0200
From:   Andreas Schwab <schwab@...ux-m68k.org>
To:     Larry Finger <Larry.Finger@...inger.net>
Cc:     Christoph Hellwig <hch@....de>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Christian Zigotzky <chzigotzky@...osoft.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [BISECTED REGRESSION] b43legacy broken on G4 PowerBook

On Jun 10 2019, Larry Finger <Larry.Finger@...inger.net> wrote:

> I do not understand why the if statement returns true as neither of the
> values is zero.

That's because the format string does not make any sense.  You are
printing garbage.

> diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
> index f7afdad..ba2489d 100644
> --- a/kernel/dma/mapping.c
> +++ b/kernel/dma/mapping.c
> @@ -317,9 +317,12 @@ int dma_supported(struct device *dev, u64 mask)
>
>  int dma_set_mask(struct device *dev, u64 mask)
>  {
> +       pr_info("mask 0x%llx, dma_mask 0x%llx, dma_supported 0x%llx\n",
> mask, dev->dma_mask,
> +               dma_supported(dev, mask));

None of the format directives match the type of the arguments.

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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