Commit 8d64f42a authored Mar 16, 2016 by Liam Mark Committed by Patrick Daly Aug 24, 2016

arm64: mm: dma: panic on dummy dma alloc



On the 4.4 kernel non platform devices now have to call
arch_setup_dma_ops to setup their dma ops otherwise the
dummy dma opts will be used.
This because of change the following change:
1dccb598 arm64: simplify dma_get_ops

Introduce a panic if a the dummy dma alloc is used to
help clients more easily identify why their dma allocations
are failing.

This patch can later be reverted once all non platform devices
have fixed their code.

Change-Id: I2dd7eb0694c8c403da21133601eb7e831ead2dfd
Signed-off-by: Liam Mark <lmark@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>

parent 36e8282d

arch/arm64/mm/dma-mapping.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -554,6 +554,7 @@ static void __dummy_alloc(struct device dev, size_t size,
		dma_addr_t *dma_handle, gfp_t flags,
		unsigned long attrs)
		{
		WARN(1, "dma alloc failure, device may be missing a call to arch_setup_dma_ops");
		return NULL;
		}