From: Christophe Leroy <christophe.leroy@c-s.fr>
Date: Wed, 28 Feb 2018 18:21:45 +0000 (+0100)
Subject: powerpc/dma: remove unnecessary BUG()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9887334b804892f10262fa7f805998d554e04367;p=linux.git

powerpc/dma: remove unnecessary BUG()

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>
---

diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
index da20569de9d43..e1cd6e979348c 100644
--- a/arch/powerpc/kernel/dma.c
+++ b/arch/powerpc/kernel/dma.c
@@ -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);