From: Segher Boessenkool <segher@kernel.crashing.org>
To: michael@ellerman.id.au
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>,
Kumar Gala <kumar.gala@freescale.com>,
Jin Zhengxiong <Jason.Jin@freescale.com>
Subject: Re: [PATCH 1/3] MSI driver for Freescale 83xx/85xx/86xx cpu
Date: Tue, 22 Apr 2008 15:22:16 +0200 [thread overview]
Message-ID: <e642c15622ac3ca89a6a43f439f2c222@kernel.crashing.org> (raw)
In-Reply-To: <1208838916.12660.10.camel@concordia.ozlabs.ibm.com>
>>>> +static void fsl_compose_msi_msg(struct pci_dev *pdev, int hwirq,
>>>> + struct msi_msg *msg)
> No I mean I'm confused about the maths here. If we pull out the
> variables it boils down to:
>
> data = ((hwirq / 32) << 5) | ((hwirq % 32) & 0x1F)
>
> Which doesn't seem to actually do anything?
It's not a no-op, because hwirq is signed. It probably should be
unsigned, like most things.
Segher
next prev parent reply other threads:[~2008-04-22 13:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-19 9:27 [PATCH 1/3] MSI driver for Freescale 83xx/85xx/86xx cpu Jason Jin
[not found] ` <1208597267-30960-2-git-send-email-Jason.jin@freescale.com>
2008-04-19 9:27 ` [PATCH 3/3] Enable MSI support for 85xxds board Jason Jin
2008-04-18 11:51 ` Segher Boessenkool
2008-04-21 6:21 ` [PATCH 1/3] MSI driver for Freescale 83xx/85xx/86xx cpu Michael Ellerman
2008-04-21 10:01 ` Jin Zhengxiong
2008-04-22 4:35 ` Michael Ellerman
2008-04-22 5:15 ` Jin Zhengxiong
2008-04-22 13:22 ` Segher Boessenkool [this message]
2008-04-23 5:45 ` Michael Ellerman
2008-04-23 16:05 ` Segher Boessenkool
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