arm64: Remove pointless WARN_ON in DMA teardown
authorRobin Murphy <robin.murphy@arm.com>
Wed, 26 Oct 2016 18:19:31 +0000 (19:19 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Mon, 7 Nov 2016 18:15:03 +0000 (18:15 +0000)
commitb7b941afe557638b29aa6bab7070cc706f3231c1
treee609cf6a1b848618d1405041bf965ec7e10c0952
parent4890ae46911c99d61fb622605c2d81bf8c86b209
arm64: Remove pointless WARN_ON in DMA teardown

We expect arch_teardown_dma_ops() to be called very late in a device's
life, after it has been removed from its bus, and thus after the IOMMU
bus notifier has run. As such, even if this funny little check did make
sense, it's unlikely to achieve what it thinks it's trying to do anyway.
It's a residual trace of an earlier implementation which didn't belong
here from the start; belatedly snuff it out.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm64/mm/dma-mapping.c