linux-kernel - Re: [PATCH 4/4] atl1: Ancillary C files for Attansic L1 driver

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Date:	Mon, 22 Jan 2007 21:00:04 +0100
From:	Luca Tettamanti <kronos.it@...il.com>
To:	Jay Cliburn <jacliburn@...lsouth.net>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>, jeff@...zik.org,
	shemminger@...l.org, csnook@...hat.com, hch@...radead.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	atl1-devel@...ts.sourceforge.net, kronos.it@...il.com
Subject: Re: [PATCH 4/4] atl1: Ancillary C files for Attansic L1 driver

Il Sun, Jan 21, 2007 at 09:33:39PM -0600, Jay Cliburn ha scritto: 
> Randy Dunlap wrote:
> >On Sun, 21 Jan 2007 15:07:37 -0600 Jay Cliburn wrote:
> [snip]
> 
> >>+	value = ioread16(hw->hw_addr + REG_PCIE_CAP_LIST);
> >>+	return ((value & 0xFF00) == 0x6C00) ? 0 : 1;
> >
> >Are there defines or enums for these?
> >Fewer magic numbers would be nice/helpful/readable.
> [snip]
> >>+	s32 ret;
> >>+	ret = atl1_write_phy_reg(hw, 29, 0x0029);
> >
> >Fewer magic numbers?
> 
> Unfortunately, we don't have a spec.  This is how the vendor coded it.
> 
> [snip]
> >>+
> >>+int enable_msi;
> >>+module_param(enable_msi, int, 0444);
> >>+MODULE_PARM_DESC(enable_msi, "Enable PCI MSI");
> >
> >Hm, I thought that we didn't want individual drivers having MSI config
> >options...
> 
> Luca?  This one was yours IIRC.  Care to chime in?

I remember that discussion, but since there's no sistem-wide MSI
blacklist (or whitelist) I don't think it's safe to enable it
unconditionally. Judging from bug reports on lkml it's not safe to
assume that MSI support is sane on non-Intel chipsets.

Luca
-- 
Il coraggio non mi manca.
E` la paura che mi frega...
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