linux-kernel - Re: [PATCH v16 03/10]USB/ppc4xx: Add Synopsys DWC OTG Core Interface Layer (CIL)

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Date:	Thu, 3 May 2012 13:40:29 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Rupjyoti Sarmah <rsarmah@...c.com>
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	rsarmah@....com
Subject: Re: [PATCH v16 03/10]USB/ppc4xx: Add Synopsys DWC OTG Core
 Interface Layer (CIL)

O> +void dwc_otg_flush_rx_fifo(struct core_if *core_if)
> +{
> +	ulong global_regs = core_if->core_global_regs;


These are all a bit odd. The register has a given size so they ought to
be u32 or u64 etc as appropriate for the register in question, ditto the
cache in the structure.



> +	for (i = 0; i < MAX_EPS_CHANNELS; i++) {
> +		offset = i * DWC_EP_REG_OFFSET;
> +
> +		dev_if->in_ep_regs[i] = (ulong)(reg_base +
> +					       DWC_DEV_IN_EP_REG_OFFSET +
> +					       offset);

And again some of the casting seems odd. If these are bus addresses they
should be typed as such.


> +static inline u32 dwc_reg_read(ulong reg , u32 offset)
> +{
> +
> +#ifdef CONFIG_DWC_OTG_REG_LE
> +	return in_le32((void __iomem *)(reg + offset));
> +#else
> +	return in_be32((void __iomem *)(reg + offset));

All this casting is a symptom of the same typing problems. They would all
go away if the types were right in the first place.

> +	u32 global_regs = (u32) core_if->core_global_regs;

And again we keep finding these casts caused by wrong types


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