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Date: Thu, 1 May 2008 11:36:18 -0400 From: Christoph Hellwig <hch@...radead.org> To: Michael Buesch <mb@...sch.de> Cc: Jesse Barnes <jbarnes@...tuousgeek.org>, John Linville <linville@...driver.com>, Andi Kleen <andi@...stfloor.org>, David Miller <davem@...emloft.net>, Alan Cox <alan@...rguk.ukuu.org.uk>, Ingo Molnar <mingo@...e.hu>, bcm43xx-dev@...ts.berlios.de, linux-wireless@...r.kernel.org, linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 0/3] Add API for weak DMA masks On Thu, May 01, 2008 at 04:38:15PM +0200, Michael Buesch wrote: > This patchset adds API and one user for a "weak" dma_set_mask(). > Weak means that it will fallback to smaller masks in case the > DMA subsystem rejects a big mask. > Currently such rejection may happen if the driver requests a 64bit > mask on a VIA machine, for example. dma_set_mask_weak() will fallback > to 32bit, in that case, and tell the caller about it by modifying the > passed mask. Why do we need it? Is the call to set the 32bit mask when it fails a too big burden for the driver author? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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