linux-kernel - Re: [PATCH V4] Fix pointer cast for 32 bits arch

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Message-ID: <20150417082017.GO10964@mwanda>
Date:	Fri, 17 Apr 2015 11:20:17 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Peter Senna Tschudin <peter.senna@...il.com>
Cc:	Alan Cox <alan@...ux.intel.com>,
	driverdevel <devel@...verdev.osuosl.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jun Tian <jun.j.tian@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Garret Kelly <garret.kelly@...il.com>,
	Octavian Purdila <octavian.purdila@...el.com>,
	Andreas <schwab@...ux-m68k.org>, Nick Kralevich <nnk@...gle.com>
Subject: Re: [PATCH V4] Fix pointer cast for 32 bits arch

Actually, my patch seems like a good idea to me but it's one of those
things that someone should probably test.  Unless someone can test
goldfish on a 32 bit system with 64 bit dma addresses then maybe the
thing to is to write the new function but preserve the current behavior.

static inline void gf_write_dma_addr(dma_addr_t addr, void __iomem *portl,
				     void __iomem *porth)
{
	writel((u32)data, portl);
	/*
	 * This should be CONFIG_ARCH_DMA_ADDR_T_64BIT but someone needs to
	 * test it.
	 */
#ifdef CONFIG_64BIT
	writel(data >> 32, porth);
#endif
}

regards,
dan carpenter

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