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Re: [RFC 4/4] iwlwifi: use writeb,writel,readl directly

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On Mon, Feb 06, 2012 at 08:32:52AM -0800, wwguy wrote:
> I believe iwl driver were use readl/writel before switch to
> ioread32/iowrite32 (long time ago)
> 
> http://www.gossamer-threads.com/lists/linux/kernel/960145
>
> also, AFAIK, the readl/writel IO functions still works but their use in
> new code is discouraged.
I do not think so, we have tons of drivers that use readl/writel.
PCI express devices can not use port-based IO, they will be
incredible slow then.

I think confusion come from a fact that iwlwifi use pci_ioremp() for
mapping registers, which can also maps port-based IO areas. Simply
changing that into pci_ioremap_bar(), and make driver depend on
CONFIG_HAS_IOMEM will remove that inconsistency.

Stanislaw 
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