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powerpc/dma: remove unnecessary BUG()

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Direction is already checked in all calling functions in
include/linux/dma-mapping.h and also in called function __dma_sync()

So really no need to check it once more here.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2018-02-28 19:21:45 +01:00 committed by Michael Ellerman
parent 5a61640e32
commit 9887334b80
1 changed files with 0 additions and 2 deletions
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2
arch/powerpc/kernel/dma.c
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@ -235,8 +235,6 @@ static inline dma_addr_t dma_nommu_map_page(struct device *dev,
enum dma_data_direction dir,
unsigned long attrs)
{
BUG_ON(dir == DMA_NONE);
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
__dma_sync_page(page, offset, size, dir);