Re: [BUG 5.14] arm64/mm: dma memory mapping fails (in some cases)
From: Christoph Hellwig <hch@lst.de>
Date: 2021-09-21 15:38:15
Also in:
linux-mm, lkml
On Tue, Sep 21, 2021 at 12:34:10PM +0300, Mike Rapoport wrote:
quoted
It doesn't create any new mappings. The only real issue is that it does the wrong thing for RAM in a way that might not be noticed on simple (x86/PC) platforms.But if the mapping request was rejected by devm_ioremap_resource() because of an attempt to map RAM, why we would get to dma_map_resource() at all?
dma_map_resource takes a phys_addr_t that could come from anywhere. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel