From: Christoph Hellwig <hch@lst.de>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
kernel@pengutronix.de, patchwork-lst@pengutronix.de,
Atish Patra <atish.patra@wdc.com>
Subject: Re: [PATCH] dma-direct: don't truncate dma_required_mask to bus addressing capabilities
Date: Tue, 6 Aug 2019 07:23:25 +0200 [thread overview]
Message-ID: <20190806052325.GB13409@lst.de> (raw)
In-Reply-To: <20190805155153.11021-1-l.stach@pengutronix.de>
On Mon, Aug 05, 2019 at 05:51:53PM +0200, Lucas Stach wrote:
> The dma required_mask needs to reflect the actual addressing capabilities
> needed to handle the whole system RAM. When truncated down to the bus
> addressing capabilities dma_addressing_limited() will incorrectly signal
> no limitations for devices which are restricted by the bus_dma_mask.
>
> Fixes: b4ebe6063204 (dma-direct: implement complete bus_dma_mask handling)
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Yeah, this looks sensible. Atish, can you check if this helps on the
HiFive board as well?
next prev parent reply other threads:[~2019-08-06 5:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-05 15:51 Lucas Stach
2019-08-06 5:23 ` Christoph Hellwig [this message]
2019-08-06 20:16 ` Atish Patra
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